2021 North Indian Ocean cyclone season#Depression BOB 01

No systems formed in the basin until April 2, when a depression near the Myanmar coast in the North Andaman Sea formed, however it dissipated the next day. It was considered rare since the storm formation usually begins from mid-April to May. After a month of inactivity, another depression formed off the coasts of Kerala and Lakshadweep. It intensified into a deep depression on the same day and later into a cyclonic storm, being assigned the name Tauktae by the IMD. It continued intensifying, and on May 17, Tauktae peaked as an extremely severe cyclonic storm before making landfall in Gujarat hours later, dissipating on May 19. A few days after Tauktae dissipated, a depression formed in the Bay of Bengal on May 23. It intensified gradually to a cyclonic storm and assigned the name Yaas. It further intensified into a very severe cyclonic storm on May 25 and made landfall in the state of Odisha by the next day, becoming the second cyclone to hit the nation within a span of ten days.

After a long gap of three and a half months, a depression formed in the Bay of Bengal on September 12, becoming the first system in the monsoon season. Not a week later, another depression formed over the east-central Bay of Bengal, making the second system in the post-monsoon season. It later intensified into a deep depression and on 25 September 2021, it intensified into cyclonic storm which was named Gulab, marking the first named storm in the post-monsoon season. Then, after only two days, the remnants of Cyclonic Storm Gulab entered the Arabian sea and regenerated into a Depression and became ARB 02. ARB 02 intensified into a cyclonic storm and was named Shaheen by the IMD. After an unusual month of inactivity, Depression ARB 03 formed in early November and remained out to sea. A couple of days later, Depression BOB 05 formed in the Bay of Bengal but failed to further intensify due to high wind shear. BOB 05 impacted portions of southern India with flooding, and some areas experienced cyclonic storm sustained winds. A few days later, Depression BOB 06 formed which gave additional rainfall and damages to the same places in southern India which were affected by BOB 05 earlier with the worst damages being in Rayalaseema region of Andhra Pradesh. In the month of December, a low pressure area entered into the Andaman Sea from the West Pacific Ocean and it intensified gradually into a cyclonic storm named as Jawad. Initially expected to make landfall over Odisha but due to extremely high wind shear, it weakened rapidly into a low pressure area without making a landfall.

{{Infobox tropical cyclone small

|Basin=NIO

|Image=BOB 01 2021-04-02 0204Z.jpg

|Track=BOB01 2021 track.png

|Formed=April 2

|Dissipated=April 3

|3-min winds=25

|1-min winds=

|Pressure=1000

}}

A tropical wave developed stretching between the Malay Peninsula and the equatorial Indian Ocean. From this wave a cyclonic circulation formed on March 26 over the southeast Bay of Bengal. The strong pulse of the Madden–Julian oscillation, high Tropical Cyclone Heat Potential, moderate sea surface temperatures up to {{cvt|29-30|C}}, and moderate wind shear, caused the system intensify into a low-pressure area on March 31. An anticyclonic circulation in southeast Asia and an upper tropospheric ridge in the westerlies caused the system to move north-northeastwards. These conditions influenced the system and its intensification as it became a well-marked low-pressure area on April 1 at 09:00 UTC (14:30 IST), and later becoming a depression on April 2 at 00:00 UTC (05:30 IST). Satellite imagery revealed that during its intensification, the clouds of the system organised and developed a low-level circulation center with intense to very intense convection at its center. It continued to maintain its intensity, however, at 00:00 UTC (05:30 IST) on April 3, vertical wind shear increased, causing the system to weaken slightly and the system's clouds to become disorganised, however, a scatterometer pass revealed that it still maintained its intensity. On April 3, at 03:00 UTC (08:30 IST), the clouds further became disorganised, while maintaining its low-level circulation. The system continued to weaken under similar unfavourable conditions with further disorganising of clouds, and at 06:00 UTC (11:30 IST), the system was downgraded to a well-marked low-pressure area, with the system barely having a circulation.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/report/26/26_eaf8e1_Preliminary%20Report%20on%20Depression%20April%202021.pdf|title=Preliminary Report of a Depression over North Andaman Sea neighbourhood during 2–3 April|website=www.rsmcnewdelhi.imd.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=April 2021|access-date=April 25, 2021|archive-url=https://web.archive.org/web/20210914122731/https://rsmcnewdelhi.imd.gov.in/uploads/report/26/26_eaf8e1_Preliminary%20Report%20on%20Depression%20April%202021.pdf|archive-date=September 14, 2021}}

The influence of the system caused light to moderate rainfall in most places of Andaman Islands and heavy rainfall in few places. The system's remnant low caused isolated rainfall over the Myanmar coast. Estimated winds of up to {{cvt|40 to 50|km/h|round=5}} gusting up to {{cvt|60|km/h|round=5}} were recorded on the island. The first tropical depression of the basin, it was also a rare disturbance since it formed in early April while the most cyclogenesis occurs during mid-April or throughout May.

{{clear}}

{{Main|Cyclone Tauktae}}

{{Infobox tropical cyclone small

|Basin=NIO

|Image=Tauktae 2021-05-17 0835Z.jpg

|Track=Tauktae 2021 track.png

|Formed=May 14

|Dissipated=May 19

|3-min winds=100

|1-min winds=120

|Pressure=950

}}

On May 14, a depression formed in the Arabian Sea off the coast of Kerala.{{Cite web|date=May 14, 2021|title=Special Tropical Weather Outlook For North India Ocean|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php#.|url-status=dead|archive-url=https://web.archive.org/web/20200725083517/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php#.|archive-date=July 25, 2020|access-date=May 14, 2021|website=mausam.imd.gov.in|publisher=India Meteorological Department}} The JTWC began monitoring the depression, and designated it as Tropical Cyclone 01A.{{Cite web|date=May 14, 2021|title=Tropical Cyclone Warning for Tropical Cyclone 01A|url=https://www.metoc.navy.mil/jtwc/products/io0121web.txt|url-status=dead|archive-url=https://web.archive.org/web/20210514100035/https://www.metoc.navy.mil/jtwc/products/io0121web.txt|archive-date=May 14, 2021|access-date=May 14, 2021|website=metoc.navy.mil|publisher=Joint Typhoon Warning Center|location=Pearl Harbor, Hawaii}} The system gradually intensified, before intensifying into a Deep Depression by 12:00 UTC (17:30 IST) that day.{{Cite web|title=Special Tropical Cyclone Outlook for North Indian Ocean 02|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php#.|url-status=live|archive-url=https://web.archive.org/web/20210514120450/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|date=May 14, 2021|archive-date=May 14, 2021|access-date=May 14, 2021|website=mausam.imd.gov.in|publisher=India Meteorological Department}} Around 18:00 UTC (23:30 IST) that day, the system intensified into a Cyclonic Storm, and it was given the name Tauktae by the IMD.{{cite web|author=|date=May 14, 2021|title=Tropical Cyclone Advisory Bulletin No. 1|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|url-status=dead|archive-url=https://web.archive.org/web/20210514215843/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|archive-date=May 14, 2021|access-date=May 14, 2021|website=mausam.imd.gov.in|publisher=India Meteorological Department}} The name Tauktae was contributed to the naming list by Myanmar, and it means gecko in the Burmese language.{{Cite web|date=May 23, 2021|title=Explained: Cyclone Yaas to hit West Bengal, Odisha on May 26 {{!}} Here's why and how cyclones are named|url=https://english.jagran.com/india/explained-cyclone-yaas-to-hit-west-bengal-odisha-on-may-26-heres-why-and-how-cyclones-are-named-10027031|access-date=May 24, 2021|website=Jagran English|archive-date=May 24, 2021|archive-url=https://web.archive.org/web/20210524124415/https://english.jagran.com/india/explained-cyclone-yaas-to-hit-west-bengal-odisha-on-may-26-heres-why-and-how-cyclones-are-named-10027031|url-status=live}} It later intensified into a Severe Cyclonic Storm at 15:00 UTC (20:30 IST) in May 15.{{Cite web|title=Special Tropical Cyclone Outlook for Cyclone Tauktae 07|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php#.|url-status=dead|archive-url=https://web.archive.org/web/20210515172759/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|archive-date=May 15, 2021|access-date=May 15, 2021|website=mausam.imd.gov.in}} Tauktae's intensification was unusual as it intensified from a depression to a severe cyclonic storm over a period of just two days, with equivalent storms generally taking four to five days to intensify into a severe cyclonic storm.{{Cite web|title=Cyclone Tauktae shows why north Indian Ocean is now whacky|url=https://www.downtoearth.org.in/news/environment/cyclone-tauktae-shows-why-north-indian-ocean-is-now-whacky-77023|access-date=June 5, 2021|website=www.downtoearth.org.in|language=en|archive-date=June 5, 2021|archive-url=https://web.archive.org/web/20210605113819/https://www.downtoearth.org.in/news/environment/cyclone-tauktae-shows-why-north-indian-ocean-is-now-whacky-77023|url-status=live}} Three hours later, the JTWC upgraded Tauktae to a Category 1-equivalent tropical cyclone on the Saffir–Simpson scale.{{Cite web|last=|first=|date=May 17, 2021|title=Tropical Cyclone 01A (Tauktae) Warning NR 007|url=https://wiki.chlod.net/jtwc/text/2021-05-15-2120-io0121web.txt|access-date=May 14, 2021|publisher=United States Joint Typhoon Warning Center|archive-date=May 25, 2021|archive-url=https://web.archive.org/web/20210525000401/https://wiki.chlod.net/jtwc/text/2021-05-15-2120-io0121web.txt|url-status=live}} Tauktae further intensified into a Very Severe Cyclonic Storm at 00:00 UTC (05:30 IST) May 16.{{Cite web|title=Tropical Cyclone Advisory Bulletin No.10 on Cyclone Tauktae|url=http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d8862f_10.%20RSMC%20TC%20ADVISORY-10%20BASED%20ON%202100%20UTC%20OF%2015.05.2021.pdf|access-date=May 16, 2021|website=India Meteorological Department|archive-date=May 21, 2021|archive-url=https://web.archive.org/web/20210521093242/http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d8862f_10.%20RSMC%20TC%20ADVISORY-10%20BASED%20ON%202100%20UTC%20OF%2015.05.2021.pdf|url-status=live}} At 06:00 UTC (11:30 IST) that day, the JTWC upgraded the storm further to a Category 2 tropical cyclone.{{Cite web|date=May 15, 2021|title=Tropical Cyclone Warning for Tropical Cyclone 01A (Tauktae)|url=https://www.metoc.navy.mil/jtwc/products/io0121web.txt|url-status=dead|archive-url=https://web.archive.org/web/20210516102812/https://www.metoc.navy.mil/jtwc/products/io0121web.txt|archive-date=May 16, 2021|access-date=May 16, 2021|website=JTWC}} INSAT imagery showed that the cyclone had developed an eye by 09:00 UTC (14:30 IST).{{Cite web|title=Special Tropical Cyclone Outlook for Cyclone Tauktae 13|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php#.|url-status=dead|archive-url=https://web.archive.org/web/20210516115715/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|archive-date=May 16, 2021|access-date=May 16, 2021|website=mausam.imd.gov.in}} However, the eye had started to degrade by 15:00 UTC (20:30 IST), according to INSAT imagery, and remained ragged for the rest of the storm's lifetime.{{Cite web|date=May 16, 2021|title=Special Tropical Cyclone Outlook for Cyclone Tauktae No. 16|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php#.|url-status=dead|archive-url=https://web.archive.org/web/20210516180744/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|archive-date=May 16, 2021|access-date=May 16, 2021|website=mausam.imd.gov.in}}

At 03:00 UTC on May 17, Tauktae intensified into an Extremely Severe Cyclonic Storm on 03:00 UTC (08:30 IST) of May 17,{{Cite web|date=May 17, 2021|title=Special Tropical Cyclone Outlook for Cyclone Tauktae No. 19|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php#.|url-status=dead|archive-url=https://web.archive.org/web/20210517033339/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|archive-date=May 17, 2021|access-date=May 17, 2021|website=mausam.imd.gov.in}} which was unexpected since many forecaster predicted that it would be a very severe cyclonic storm.{{Cite web|date=May 17, 2021|title=Tauktae intensified rapidly this morning, took IMD and scientists by surprise|url=https://www.hindustantimes.com/india-news/tauktae-intensified-rapidly-this-morning-took-imd-and-scientists-by-surprise-101621244231085.html|access-date=June 5, 2021|website=Hindustan Times|language=en|archive-date=June 5, 2021|archive-url=https://web.archive.org/web/20210605113001/https://www.hindustantimes.com/india-news/tauktae-intensified-rapidly-this-morning-took-imd-and-scientists-by-surprise-101621244231085.html|url-status=live}} The JTWC upgraded Tauktae to a Category 4-equivalent tropical cyclone soon afterward.{{Cite web|last=|first=|date=May 17, 2021|title=Tropical Cyclone 01A (Tauktae) Warning NR 012|url=https://wiki.chlod.net/jtwc/text/2021-05-17-0220-io0121web.txt|access-date=May 17, 2021|publisher=United States Joint Typhoon Warning Center|archive-date=May 21, 2021|archive-url=https://web.archive.org/web/20210521091112/https://wiki.chlod.net/jtwc/text/2021-05-17-0220-io0121web.txt|url-status=live}} However, Tauktae quickly weakened into a Category 3-equivalent tropical cyclone later that day.{{Cite web|last=|first=|date=May 17, 2021|title=Tropical Cyclone 01A (Tauktae) Warning NR 014|url=https://wiki.chlod.net/jtwc/text/2021-05-17-1420-io0121web.txt|access-date=May 17, 2021|publisher=United States Joint Typhoon Warning Center|archive-date=May 21, 2021|archive-url=https://web.archive.org/web/20210521091703/https://wiki.chlod.net/jtwc/text/2021-05-17-1420-io0121web.txt|url-status=live}} The cyclone made landfall in the region of Saurashtra between Diu and Una at around 15:30 UTC (21:00 IST). After landfall, Tauktae weakened to a Very Severe Cyclonic Storm. Wind speeds of approximately {{cvt|150 to 175|km/h}} were recorded at the district of Diu in the union territory of Dadra and Nagar Haveli and Daman and Diu. It became one of strongest tropical cyclone to make landfall in the Indian state of Gujarat since the 1998 Gujarat cyclone.{{Cite web|date=May 17, 2021|title=Tropical Cyclone Tauktae Tied Strongest Landfall On Record In India's Gujarat State|url=https://weather.com/storms/hurricane/news/2021-05-13-cyclone-tauktae-india-pakistan-arabian-sea-forecast|access-date=May 21, 2021|website=The Weather Channel|archive-date=May 21, 2021|archive-url=https://web.archive.org/web/20210521065752/https://weather.com/storms/hurricane/news/2021-05-13-cyclone-tauktae-india-pakistan-arabian-sea-forecast|url-status=live}}{{Cite web|date=May 18, 2021|title=Cyclone Tauktae LIVE Updates: Severe Storm Weakens After Landfall in Gujarat, Search Ops Continue at Mumbai High as 127 Still Missing|url=https://www.news18.com/news/india/cyclone-tauktae-live-tracking-gujarat-mumbai-maharashtra-goa-kerala-weather-saurashtra-karnataka-3748352.html|access-date=May 18, 2021|website=www.news18.com|archive-date=May 18, 2021|archive-url=https://web.archive.org/web/20210518022424/https://www.news18.com/news/india/cyclone-tauktae-live-tracking-gujarat-mumbai-maharashtra-goa-kerala-weather-saurashtra-karnataka-3748352.html|url-status=live}} Meanwhile, the JTWC issued their last tropical cyclone warning on the storm at 21:00 UTC (02:30 IST) on May 17.{{Cite web|date=May 17, 2021|title=Final Warning of Tropical Cyclone 01A (Tauktae) No.15|url=https://www.metoc.navy.mil/jtwc/products/io0121web.txt|url-status=dead|archive-url=https://web.archive.org/web/20210518035723/https://www.metoc.navy.mil/jtwc/products/io0121web.txt|archive-date=May 18, 2021|access-date=May 17, 2021|website=JTWC}} The weakening trend although slower than usual due to the brown ocean effect mostly because of the influence of a western disturbance, which continued as it moved further inland until 14:00 UTC (19:30 IST) on May 19, when it was downgraded to a well-marked low pressure area over Eastern Rajasthan and adjoining west Madhya Pradesh, later dissipating.{{Cite web|date=May 19, 2021|title=Last National Bulletin for Cyclone Tauktae|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php#.|url-status=dead|archive-url=https://web.archive.org/web/20210519160624/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|archive-date=May 19, 2021|access-date=May 19, 2021|website=mausam.imd.gov.in}}{{Cite web|date=May 27, 2021|title=Explained: How does Tauktae compare with other cyclones in severity and damage?|url=https://indianexpress.com/article/explained/how-tauktae-compares-with-other-cyclones-in-severity-damage-7324998/|access-date=June 5, 2021|website=The Indian Express|language=en|archive-date=June 7, 2021|archive-url=https://web.archive.org/web/20210607112520/https://indianexpress.com/article/explained/how-tauktae-compares-with-other-cyclones-in-severity-damage-7324998/|url-status=live}} The combination of a western disturbance and the remnants of Cyclone Tauktae have also caused heavy rainfall in Northwestern India.{{Cite web|date=May 19, 2021|title=Heavy rain likely in Delhi–NCR, parts of north India as Cyclone Tauktae weakens: IMD|url=https://www.indiatoday.in/india/story/heavy-rain-delhi-ncr-north-india-cyclone-tauktae-imd-1804171-2021-05-19|access-date=May 21, 2021|website=India Today|archive-date=May 20, 2021|archive-url=https://web.archive.org/web/20210520054336/https://www.indiatoday.in/india/story/heavy-rain-delhi-ncr-north-india-cyclone-tauktae-imd-1804171-2021-05-19|url-status=live}}

A total of 174 people were confirmed to have been killed by the storm, and 81 others are still missing.{{cite news |title=Tauktae killed 122, forced 2.6 lakh evacuation in 6 states: Government |url=https://timesofindia.indiatimes.com/india/tauktae-killed-122-forced-2-6l-evacuation-in-6-states-government/articleshow/82816075.cms |access-date=May 21, 2021 |work=The Times of India |date=May 21, 2021 |archive-date=May 21, 2021 |archive-url=https://web.archive.org/web/20210521094122/https://timesofindia.indiatimes.com/india/tauktae-killed-122-forced-2-6l-evacuation-in-6-states-government/articleshow/82816075.cms |url-status=live }}

Heavy rainfall was reported over areas of Kerala,{{Cite news|date=May 14, 2021|title=Cyclone Tauktae: South Kerala reports heavy rainfall|work=Big News Network|url=https://www.bignewsnetwork.com/news/269463850/cyclone-tauktae-south-kerala-reports-heavy-rainfall|access-date=May 14, 2021|archive-date=May 14, 2021|archive-url=https://web.archive.org/web/20210514080032/https://www.bignewsnetwork.com/news/269463850/cyclone-tauktae-south-kerala-reports-heavy-rainfall|url-status=live}} causing flash floods and waterlogging soil;{{Cite news|date=May 14, 2021|title=Kerala Receives Heavy Rain Due to Cyclone Tauktae, IMD Says Monsoon to Make Early Arrival This Year|work=India.com|editor-last=Kumari|editor-first=Priyanka|url=https://www.india.com/news/india/kerala-receives-heavy-rain-due-to-cyclone-tauktae-imd-says-monsoon-to-make-early-arrival-this-year-4664481/|access-date=May 15, 2021|archive-date=May 15, 2021|archive-url=https://web.archive.org/web/20210515034647/https://www.india.com/news/india/kerala-receives-heavy-rain-due-to-cyclone-tauktae-imd-says-monsoon-to-make-early-arrival-this-year-4664481/|url-status=live}} fishing was temporarily banned in the area due to rough seas.{{Cite news|date=May 14, 2021|title=Cyclone Tauktae may intensify into "very severe cyclonic" storm, to cross Gujarat next week|work=The Times of India|url=https://timesofindia.indiatimes.com/india/tauktae-may-intensify-into-very-severe-cyclonic-storm-to-cross-gujarat-next-week-10-points/articleshow/82633315.cms|access-date=May 15, 2021|archive-date=May 19, 2021|archive-url=https://web.archive.org/web/20210519145012/https://timesofindia.indiatimes.com/india/tauktae-may-intensify-into-very-severe-cyclonic-storm-to-cross-gujarat-next-week-10-points/articleshow/82633315.cms|url-status=live}} Parts of Kerala and Lakshadweep were placed under a red alert on May 14.{{Cite news|date=May 14, 2021|title=Cyclone, Weather Forecast Live Updates: NDRF deploys 24 teams after cyclonic warning; Red alert in Kerala, Lakshadweep|work=The Indian Express|url=https://indianexpress.com/article/weather/cyclone-takutae-2021-live-updates-gujarat-kerala-lakshadweep-7314509/|access-date=May 14, 2021|archive-date=May 15, 2021|archive-url=https://web.archive.org/web/20210515132121/https://indianexpress.com/article/weather/cyclone-takutae-2021-live-updates-gujarat-kerala-lakshadweep-7314509/|url-status=live}} The second state experienced heavy rainfall as the cyclone tracked west of the Indian coast. In Chellanan, a village in Ernakulam district, homes were submerged underwater due to unexpected rain and coastal erosion. Agricultural losses statewide was ₹828 crore (US$113 million).{{Cite news|date=June 4, 2021|title=Tauktae: Kerala suffers crop loss of Rs 828 crore|url=https://timesofindia.indiatimes.com/city/kochi/tauktae-kerala-suffers-crop-loss-of-rs-828-crore/articleshow/83227511.cms|access-date=June 10, 2021|website=Times of India}} The administration opened up a relief camp at the local St. Mary's School for the inhabitants of low-lying areas. Due to the ongoing second wave of the COVID-19 pandemic in India, isolated testing facilities were arranged.{{Cite web|date=May 14, 2021|title=Cyclone, Weather Forecast Live Updates: Heavy rains continue to pound Kerala as Cyclone Tauktae intensifies|url=https://indianexpress.com/article/weather/cyclone-takutae-2021-live-updates-gujarat-kerala-lakshadweep-7314509/|access-date=May 14, 2021|website=The Indian Express|archive-date=May 15, 2021|archive-url=https://web.archive.org/web/20210515132121/https://indianexpress.com/article/weather/cyclone-takutae-2021-live-updates-gujarat-kerala-lakshadweep-7314509/|url-status=live}} The most severe effects of Cyclone Tauktae occurred in the states of Maharashtra and Saurashtra in Gujarat. The latter state reported the losses of ₹10,000 crore (US$1.37 billion).{{Cite news|last=Dave|first=Kapil|date=May 27, 2021|title=Cyclone Tauktae damages pegged at Rs 10,000 crore in Gujarat|url=https://timesofindia.indiatimes.com/city/ahmedabad/tauktae-caused-damage-worth-rs-10000-crore-in-gujarat/articleshow/82987212.cms|access-date=May 31, 2021|website=Times of India}} The city of Mumbai experienced heavy rainfall, very strong trees and waves crashed the shores. Trees were uprooted and streets were waterlogged. It was the strongest cyclone since Cyclone Nisarga in 2020.{{Cite web|title=Mayday for Mumbai: Cyclone Tauktae Highlights a Growing Threat as Mumbai Witnesses Unprecedented Rain, Winds|url=https://weather.com/en-IN/india/news/news/2021-05-18-mumbai-cyclone-tauktae-growing-threat-unprecedented-rain-winds|access-date=May 20, 2021|website=The Weather Channel|archive-date=May 20, 2021|archive-url=https://web.archive.org/web/20210520121553/https://weather.com/en-IN/india/news/news/2021-05-18-mumbai-cyclone-tauktae-growing-threat-unprecedented-rain-winds|url-status=live}} As a precaution, flight operations at Chhatrapati Shivaji Maharaj International Airport were temporarily halted before resuming hours later.{{Cite web|title=Cyclone Tauktae Highlights: Cyclone Tauktae Crosses Gujarat Coast, Weakens|url=https://www.ndtv.com/india-news/cyclone-tauktae-live-updates-very-severe-cyclonic-storm-likely-to-intensify-further-warns-weather-office-2443064|access-date=May 18, 2021|website=NDTV.com|archive-date=May 17, 2021|archive-url=https://web.archive.org/web/20210517203529/https://www.ndtv.com/india-news/cyclone-tauktae-live-updates-very-severe-cyclonic-storm-likely-to-intensify-further-warns-weather-office-2443064|url-status=live}} The cyclone also affected neighbouring countries like Pakistan, Maldives and Sri Lanka.{{Cite web|title=India, Pakistan - Tropical Cyclone TAUKTAE (DG ECHO, DG ECHO partners, GDACS, JTWC, IMD, PMD, media) (ECHO Daily Flash of May 17, 2021) - India|url=https://reliefweb.int/report/india/india-pakistan-tropical-cyclone-tauktae-dg-echo-dg-echo-partners-gdacs-jtwc-imd-pmd|access-date=May 20, 2021|website=ReliefWeb|archive-date=May 20, 2021|archive-url=https://web.archive.org/web/20210520091557/https://reliefweb.int/report/india/india-pakistan-tropical-cyclone-tauktae-dg-echo-dg-echo-partners-gdacs-jtwc-imd-pmd|url-status=live}} In the Sindh province of Pakistan, four people died due to a roof collapse caused by strong winds.{{Cite web|date=May 20, 2021|title=Cyclone Tauktae: 4 killed in mishaps as dust storm hits Karachi|url=https://timesofindia.indiatimes.com/world/pakistan/cyclone-tauktae-4-killed-in-mishaps-as-dust-storm-hits-karachi/articleshow/82796145.cms|access-date=May 20, 2021|website=The Times of India|archive-date=May 20, 2021|archive-url=https://web.archive.org/web/20210520101048/http://timesofindia.indiatimes.com/world/pakistan/cyclone-tauktae-4-killed-in-mishaps-as-dust-storm-hits-karachi/articleshow/82796145.cms|url-status=live}}{{Cite web|date=May 19, 2021|title=Cyclone Tauktae: 4 killed in roof collapse incidents after dust storm in Karachi|url=https://www.hindustantimes.com/world-news/cyclone-tauktae-4-killed-in-roof-collapse-incidents-after-dust-storm-in-karachi-101621387740643.html|access-date=May 19, 2021|website=Hindustan Times|archive-date=May 19, 2021|archive-url=https://web.archive.org/web/20210519013551/https://www.hindustantimes.com/world-news/cyclone-tauktae-4-killed-in-roof-collapse-incidents-after-dust-storm-in-karachi-101621387740643.html|url-status=live}}

{{Clear}}

{{Main|Cyclone Yaas}}

{{Infobox hurricane small

|Basin=NIO

|Image=Yaas 2021-05-26 0500Z.jpg

|Track=Yaas 2021 track.png

|Formed=May 23

|Dissipated=May 28

|3-min winds=75

|1-min winds=65

|Pressure=970

}}

On May 22, a low-pressure area formed in the Bay of Bengal. On the next day, at 09:30 UTC (15:00 IST), the disturbance organised into a Depression, and was assigned the designation BOB 02 by the IMD.{{Cite web|date=May 23, 2021|title=Special Tropical Cyclone Bulletin for Depression BOB 02 No. 1|url=http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_09c7b3_SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%20%200600%20UTC%20of%2023.05.2021.pdf|url-status=dead|archive-url=https://web.archive.org/web/20210523092108/http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_09c7b3_SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%20%200600%20UTC%20of%2023.05.2021.pdf|archive-date=May 23, 2021|access-date=May 23, 2021|website=IMD}} Later that day, the JTWC issued a Tropical Cyclone Formation Alert for the system.{{Cite web|date=May 23, 2021|title=Tropical Cyclone Formation Alert for Invest 93B|url=https://www.metoc.navy.mil/jtwc/products/io9321web.txt|url-status=dead|archive-url=https://web.archive.org/web/20210523163909/https://www.metoc.navy.mil/jtwc/products/io9321web.txt|archive-date=May 23, 2021|access-date=May 23, 2021|website=JTWC}} The storm subsequently intensified into a Deep Depression at 15:00 UTC (20:30 IST) on May 23.{{Cite web|date=May 24, 2021|title=Special Tropical Cyclone Outlook for Deep Depression BOB 02|url=http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_4628ed_SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%201800%20UTC%20of%2023.05.2021.pdf|url-status=dead|archive-url=https://web.archive.org/web/20210524032158/http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_4628ed_SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%201800%20UTC%20of%2023.05.2021.pdf|archive-date=May 24, 2021|access-date=May 24, 2021|website=mausam.imd.gov.in}} Several hours later, the storm further intensified into a Cyclonic Storm at 03:00 UTC (08:30 IST) on May 24, and was given the name Yaas by the IMD.{{Cite web|date=May 24, 2021|title=National Bulletin for Cyclonic Storm Yaas|url=http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_8bdb8d_4.%20National_Bulletin_20210524_0000UTC.pdf|url-status=dead|archive-url=https://web.archive.org/web/20210524034636/http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_8bdb8d_4.%20National_Bulletin_20210524_0000UTC.pdf|archive-date=May 24, 2021|access-date=May 24, 2021|website=IMD}} The name Yaas was provided by Oman, and it means "a Jasmin-like tree", which has good fragrance in Persian. In Arabic, the name Yaas is known as despair or desperation.{{Cite web|date=May 21, 2021|title=Cyclone 'Yaas' Likely to Hit Coasts of Bengal, Odisha on May 26; Know Origin, Meaning of Name|url=https://www.news18.com/news/india/cyclone-yaas-likely-to-hit-coasts-of-bengal-odisha-on-may-26-know-origin-meaning-of-name-3762215.html|access-date=May 24, 2021|website=www.news18.com|language=en|archive-date=May 24, 2021|archive-url=https://web.archive.org/web/20210524140418/https://www.news18.com/news/india/cyclone-yaas-likely-to-hit-coasts-of-bengal-odisha-on-may-26-know-origin-meaning-of-name-3762215.html|url-status=live}} Meanwhile, JTWC designated as Tropical Cyclone 02B.{{Cite web|date=May 24, 2021|title=Tropical Cyclone Warning for Cyclone 02B (Two) No.1|url=https://www.metoc.navy.mil/jtwc/products/io0221web.txt|url-status=dead|archive-url=https://web.archive.org/web/20210524042107/https://www.metoc.navy.mil/jtwc/products/io0221web.txt|archive-date=May 24, 2021|access-date=May 24, 2021|website=JTWC}} On May 24, at 18:00 UTC (23:30 IST) it rapidly intensified into a severe cyclonic storm,{{Cite web|date=May 24, 2021|title=Tropical Cyclone Advisory for Cyclone Yaas No. 7|url=http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_bb411f_7.%20RSMC%20TC%20ADVISORY-7%20BASED%20ON%201800%20UTC%20OF%2024.05.2021.pdf|url-status=dead|archive-url=https://web.archive.org/web/20210608062955/http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_bb411f_7.%20RSMC%20TC%20ADVISORY-7%20BASED%20ON%201800%20UTC%20OF%2024.05.2021.pdf|archive-date=June 8, 2021|access-date=June 8, 2021|website=IMD}} then becoming a very severe cyclonic storm on 15:00 UTC (20:30 IST) of May 25 despite being present in moderate to high easterly wind shear.{{Cite web|date=May 25, 2021|title=National Bulletin for Cyclone Yaas No. 16|url=http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_4cb0a4_16.National_Bulletin_20210525_1200TC.pdf|url-status=dead|archive-url=https://web.archive.org/web/20210525155123/http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_4cb0a4_16.National_Bulletin_20210525_1200TC.pdf|archive-date=May 25, 2021|access-date=May 25, 2021|website=IMD}} Meanwhile, JTWC upgraded it into a Category 1 tropical cyclone on 15:00 UTC (20:30 IST) of the same day.{{Cite web|date=May 25, 2021|title=Tropical Cyclone Warning for Cyclone 02B (Yaas) No.7|url=https://www.metoc.navy.mil/jtwc/products/io0221web.txt|url-status=dead|archive-url=https://web.archive.org/web/20210525160506/https://www.metoc.navy.mil/jtwc/products/io0221web.txt|archive-date=May 25, 2021|access-date=May 25, 2021|website=JTWC}} The cyclone made landfall north of Dhamra Port and south of Bahanaga at around 03:30 UTC (09:00 IST) in May 26.{{Cite web|date=May 26, 2021|title=Cyclone Yaas LIVE Updates: 1 Dead in East Midnapore as Heavy Rains Inundate Bengal; Cyclone Completes Landfall in 3.5 Hrs|url=https://www.news18.com/news/india/cyclone-yaas-live-tracker-odisha-dhamra-west-bengal-balasore-jharkhand-rainfall-update-3776906.html|access-date=May 26, 2021|website=www.news18.com|language=en|archive-date=May 26, 2021|archive-url=https://web.archive.org/web/20210526023838/https://www.news18.com/news/india/cyclone-yaas-live-tracker-odisha-dhamra-west-bengal-balasore-jharkhand-rainfall-update-3776906.html|url-status=live}} The process completed at around 05:30 UTC (11:00 IST ), with estimated winds up to {{cvt|130 to 140|km/h|round=5}}. Storm surge caused most of the damage in south Bengal and northwestern Odisha.{{Cite web|title=Cyclone Yaas live updates: Three lakh houses damaged in West Bengal|url=https://timesofindia.indiatimes.com/city/kolkata/cyclone-yaas-live-tracking-odisha-west-bengal-brace-for-severe-cyclonic-storm/liveblog/82962051.cms|access-date=May 26, 2021|website=The Times of India|language=en|archive-date=May 26, 2021|archive-url=https://web.archive.org/web/20210526022934/https://timesofindia.indiatimes.com/city/kolkata/cyclone-yaas-live-tracking-odisha-west-bengal-brace-for-severe-cyclonic-storm/liveblog/82962051.cms|url-status=live}} After landfall it started to weaken rapidly into a severe cyclonic storm then into a cyclonic storm.{{Cite web|date=May 26, 2021|title=Special Tropical Cyclone Outlook for Cyclone Yaas No. 21|url=https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|url-status=dead|archive-url=https://web.archive.org/web/20210526163145/https://mausam.imd.gov.in/imd_latest/contents/cyclone.php|archive-date=May 26, 2021|access-date=May 26, 2021|website=IMD}} As it moved further inland towards Nepal, IMD discontinuing advisories for Cyclone Yaas, as it became a well marked low pressure on 00:00 UTC (05:00 IST) of May 28.{{Cite web|date=May 28, 2021|title=Final National Bulletin for Cyclone Yaas No.33|url=http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_394a49_33.%20National_Bulletin_20210528_0000UTC.pdf|url-status=dead|archive-url=https://web.archive.org/web/20210528082726/http://www.rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_394a49_33.%20National_Bulletin_20210528_0000UTC.pdf|archive-date=May 28, 2021|access-date=May 28, 2021|website=IMD}} JTWC later issued their last warning at 09:00 UTC (11:30 IST) in May 26, stating that it rapidly weakened into a tropical storm after landfall.{{Cite web|date=May 26, 2021|title=Final Tropical Cyclone Warning for Cyclone 02B (Yaas) No. 10|url=https://www.metoc.navy.mil/jtwc/products/io0221web.txt|url-status=dead|archive-url=https://web.archive.org/web/20210526105932/https://www.metoc.navy.mil/jtwc/products/io0221web.txt|archive-date=May 26, 2021|access-date=May 26, 2021|website=JTWC}} The remnant of Cyclone Yaas continued moving north-northwestwards and impacted Bihar, Jharkhand and eastern Uttar Pradesh. Heavy rainfall and gusty winds were reported in these areas.{{Cite web|date=May 27, 2021|title=8 lakh people affected due to Cyclone Yaas in Jharkhand, UN says ready to support rescue efforts: 10 points|url=https://www.hindustantimes.com/india-news/cyclone-yaas-8-lakh-people-affected-in-jharkhand-101622107869426.html|access-date=May 29, 2021|website=Hindustan Times|language=en|archive-date=May 27, 2021|archive-url=https://web.archive.org/web/20210527094714/https://www.hindustantimes.com/india-news/cyclone-yaas-8-lakh-people-affected-in-jharkhand-101622107869426.html|url-status=live}}{{Cite web|date=May 29, 2021|title=Cyclone Yass: बिहार में चक्रवात यास के कारण सात की मौत, CM नीतीश कुमार का निर्देश- पीड़ितों के परिजनों को दिए जाएं चार-चार लाख रुपये|url=https://www.abplive.com/states/bihar/seven-killed-due-to-cyclone-yas-in-bihar-1920089|access-date=May 29, 2021|website=www.abplive.com|language=hi|archive-date=May 28, 2021|archive-url=https://web.archive.org/web/20210528223305/https://www.abplive.com/states/bihar/seven-killed-due-to-cyclone-yas-in-bihar-1920089|url-status=live}}{{Cite web|title=यास चक्रवाती तूफान का असर, यूपी के 25 जिलों में भारी बारिश की संभावना|url=https://www.livehindustan.com/uttar-pradesh/story-cyclone-yaas-impacts-heavy-rainfall-likely-in-25-districts-of-up-gonda-basti-kushinagar-gorakhpur-deoria-ballia-azamgarh-mau-ghazipur-varanasi-4067257.html|access-date=May 29, 2021|website=Hindustan|language=hindi|archive-date=June 2, 2021|archive-url=https://web.archive.org/web/20210602212846/https://www.livehindustan.com/uttar-pradesh/story-cyclone-yaas-impacts-heavy-rainfall-likely-in-25-districts-of-up-gonda-basti-kushinagar-gorakhpur-deoria-ballia-azamgarh-mau-ghazipur-varanasi-4067257.html|url-status=live}} The cyclone also helped the monsoon to strengthen over the Bay of Bengal, after Tauktae disrupted it on May 15.{{Cite web|title=Southwest Monsoon Rainfall Likely to Remain Well-Distributed for Most of India in June {{!}} The Weather Channel - Articles from The Weather Channel {{!}} weather.com|url=https://weather.com/en-IN/india/news/news/2021-06-04-southwest-monsoon-rainfall-likely-to-remain-well-distributed|access-date=June 5, 2021|website=The Weather Channel|language=en-IN|archive-date=June 5, 2021|archive-url=https://web.archive.org/web/20210605093542/https://weather.com/en-IN/india/news/news/2021-06-04-southwest-monsoon-rainfall-likely-to-remain-well-distributed|url-status=live}}

Eleven people had been reported dead due to Cyclone Yaas. Of them, two died in a tornado outbreak which struck West Bengal's Hooghly District and North 24 Paraganas, according to Chief Minister Mamata Banerjee. At least 80 homes had been damaged.{{Cite web|title=Two electrocuted, 40 houses partly damaged in tornado ahead of Cyclone Yaas: Chief Minister Mamata Banerjee|url=https://www.hindustantimes.com/cities/kolkata-news/two-electrocuted-40-houses-partly-damaged-in-tornado-ahead-of-yaas-mamata-101621951493381.html|access-date=May 25, 2021|website=Hindustan Times|date=May 25, 2021|language=en|archive-date=May 26, 2021|archive-url=https://web.archive.org/web/20210526063928/https://www.hindustantimes.com/cities/kolkata-news/two-electrocuted-40-houses-partly-damaged-in-tornado-ahead-of-yaas-mamata-101621951493381.html|url-status=live}} Another died as a tree fell onto him, and a teen was found dead in a river. Two farmers had also died after being struck by lightning, and an elderly woman was trapped in a collapsed house, eventually dying there. Two individuals were killed as they were crushed by uprooted trees while in Jharkhand, two more people were found dead in a collapsed house on May 27. estimated the total damages in West Bengal from the system to be at ₹20 thousand crore (US$2.76 billion).{{Cite web|last1=Khanra|first1=Sujoy|last2=Mandal|first2=Suman|date=May 29, 2021|first3=Debashis|last3=Konar|title=Initial Cyclone Yaas damage Rs 20,000 crore, West Bengal CM Mamata Banerjee tells PM Modi|url=https://timesofindia.indiatimes.com/city/kolkata/initial-cyclone-damage-rs-20k-cr-cm-tells-modi/articleshow/83050098.cms|access-date=May 29, 2021|website=The Times of India|language=en|archive-date=May 29, 2021|archive-url=https://web.archive.org/web/20210529001528/http://timesofindia.indiatimes.com/city/kolkata/initial-cyclone-damage-rs-20k-cr-cm-tells-modi/articleshow/83050098.cms|url-status=live}} The most affected states are West Bengal and Odisha. At least 10 million people were affected and 300,000 houses were damaged. Most them were caused by storm surge, high astronomical tides and broken embankments. The West Bengal Government verified that 134 embankments has been damaged. At least two million people were evacuated in the states of West Bengal, Odisha and Jharkhand.{{Cite web|date=May 27, 2021|title=Cyclone Yaas LIVE Updates: PM Modi to Visit West Bengal, Odisha Tomorrow; Mamata Announces Rs 1,000 Cr Relief Package|url=https://www.news18.com/news/india/cyclone-yaas-live-updates-rain-mamata-banerjee-odisha-bengal-cyclone-3780875.html|access-date=May 27, 2021|website=www.news18.com|language=en|archive-date=May 27, 2021|archive-url=https://web.archive.org/web/20210527132640/https://www.news18.com/news/india/cyclone-yaas-live-updates-rain-mamata-banerjee-odisha-bengal-cyclone-3780875.html|url-status=live}} Towns of Frazerganj, Bakkhali, Sundarban, Kakdwip, Namkhana, Ganga Sagar and Gosaba were flooded by seawater.{{Cite web|title=In Pictures: Cyclone Yaas Leaves Behind a Trail of Destruction; At Least One Crore People Affected (PHOTOS) {{!}} The Weather Channel - Articles from The Weather Channel {{!}} weather.com|url=https://weather.com/en-IN/india/news/news/2021-05-27-cyclone-yaas-leaves-behind-trail-of-destruction-photos|access-date=May 27, 2021|website=The Weather Channel|language=en-IN|archive-date=May 27, 2021|archive-url=https://web.archive.org/web/20210527132639/https://weather.com/en-IN/india/news/news/2021-05-27-cyclone-yaas-leaves-behind-trail-of-destruction-photos|url-status=live}} As a precautionary measure, airports of Bhubaneswar, Jharsuguda, Kolkata, Rourkela and Durgapur were closed temporarily until May 27.{{Cite web|date=May 26, 2021|title=Cyclone Yaas impact: 5 airports to remain shut today. Timings and other details|url=https://www.livemint.com/news/india/cyclone-yaas-impact-5-airports-to-remain-shut-today-timings-and-other-details-11621993028866.html|access-date=May 27, 2021|website=mint|language=en|archive-date=May 27, 2021|archive-url=https://web.archive.org/web/20210527132639/https://www.livemint.com/news/india/cyclone-yaas-impact-5-airports-to-remain-shut-today-timings-and-other-details-11621993028866.html|url-status=live}} Cyclone Yaas generated high waves and storm surge which crashed the coastal beaches of Digha and Mandarmoni. The concrete embankments broke and seawater flooded the entire Digha—Mandarmoni Belt.{{Cite web|last1=Mondal|first1=Suman|date=May 27, 2021|first2=Monotosh|last2=Chakraborty|title=Cyclone Yaas: Sea water floods hotels in Digha-Mandarmani belt|url=https://timesofindia.indiatimes.com/city/kolkata/sea-water-floods-hotels-in-digha-mandarmani-belt/articleshow/82985014.cms|access-date=May 28, 2021|website=The Times of India|language=en|archive-date=May 27, 2021|archive-url=https://web.archive.org/web/20210527055407/https://timesofindia.indiatimes.com/city/kolkata/sea-water-floods-hotels-in-digha-mandarmani-belt/articleshow/82985014.cms|url-status=live}} Because of big wind field of Cyclone Yaas, Kolkata experienced powerful gusty winds, Alipore Meteorological Department recorded {{cvt|62|km/h}} winds.{{Cite web|title=Why cyclone caused light, not heavy, rain|url=https://epaper.telegraphindia.com/imageview_362298_42359798_4_71_27-05-2021_8_i_1_sf.html|access-date=May 28, 2021|website=epaper.telegraphindia.com|archive-date=October 3, 2021|archive-url=https://web.archive.org/web/20211003065923/https://epaper.telegraphindia.com/imageview_362298_42359798_4_71_27-05-2021_8_i_1_sf.html|url-status=dead}} Minimal damage was reported, however high tides caused the Hooghly River to flood neighboring banks like Kalighat, Howrah and Chelta.{{Cite web|title=Tide too high but effect limited|url=https://epaper.telegraphindia.com/imageview_362298_42320334_4_71_27-05-2021_8_i_1_sf.html|access-date=May 28, 2021|website=epaper.telegraphindia.com|archive-date=October 3, 2021|archive-url=https://web.archive.org/web/20211003065921/https://epaper.telegraphindia.com/imageview_362298_42320334_4_71_27-05-2021_8_i_1_sf.html|url-status=dead}} The cyclone also affected Nepal and Bangladesh.{{Cite web|title=Cyclone Yass triggers warnings of adverse weather, natural disasters|url=https://kathmandupost.com/climate-environment/2021/05/28/cyclone-yass-triggers-warnings-of-adverse-weather-natural-disasters|access-date=May 28, 2021|website=kathmandupost.com|language=English|archive-date=May 28, 2021|archive-url=https://web.archive.org/web/20210528023208/https://kathmandupost.com/climate-environment/2021/05/28/cyclone-yass-triggers-warnings-of-adverse-weather-natural-disasters|url-status=live}}{{Cite web|date=May 26, 2021|title=Cyclone Yaas Swamps India and Bangladesh|url=https://earthobservatory.nasa.gov/images/148371/cyclone-yaas-swamps-india-and-bangladesh|access-date=May 28, 2021|website=earthobservatory.nasa.gov|language=en|archive-date=May 28, 2021|archive-url=https://web.archive.org/web/20210528000827/https://earthobservatory.nasa.gov/images/148371/cyclone-yaas-swamps-india-and-bangladesh|url-status=live}} The remnants of Cyclone Yaas made landfall in Nepal and triggered heavy rainfall. Meanwhile, Bangladesh experienced high tide and storm surge which flooded many villages.

{{clr}}

{{Infobox hurricane small

|Basin=NIO

|Image=BOB03 2021-09-12 1121Z.jpg

|Track=BOB03 2021 track.png

|Formed=September 12

|Dissipated=September 15

|3-min winds=30

|1-min winds=

|Pressure=990

}}

On September 11 at 00:00 UTC (05:30 IST), under an influence of a cyclonic disturbance, an area of low pressure had formed over the east central and the adjoining northeastern Bay of Bengal, which later intensified into a well marked low pressure area, a day later. At 12:00 UTC (17:30 IST) the same day, it further concentrated into a depression as it approached the coast of Odisha. Conditions like low to moderate vertical wind shear, warm sea-surface temperature and strong pulse of Madden Julian Oscillation helped the system's intensification to a depression. Due to the prevailing monsoonal trade winds, the system moved west-northwestwards for the rest of its lifetime.{{cite journal|last1=Liang|first1=Jia|last2=Wu|first2=Liguang|date=April 1, 2015|title= Sudden Track Changes of Tropical Cyclones in Monsoon Gyres: Full-Physics, Idealized Numerical Experiments|journal=American Meteorological Society|volume=72 |issue=4 |pages=1307–1322|doi=10.1175/JAS-D-13-0393.1|bibcode=2015JAtS...72.1307L |s2cid=119423565 |doi-access=free}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/report/26/26_2a0ef3_Preliminary%20Report%20of%20Deep%20Depression%20over%20northwest%20Bay%20of%20Bengal%20%20during%2012-15%20Sept.pdf|title=Preliminary Report of Deep Depression over northwest Bay of Bengal during 12–15 September|website=rsmcnewdelhi.imd.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=September 2021|access-date=January 8, 2022|archive-url=https://web.archive.org/web/20220108173009/https://rsmcnewdelhi.imd.gov.in/uploads/report/26/26_2a0ef3_Preliminary%20Report%20of%20Deep%20Depression%20over%20northwest%20Bay%20of%20Bengal%20%20during%2012-15%20Sept.pdf|archive-date=January 8, 2022}} As the system was about to make landfall near Chandbali, Odisha, it further concentrated deep depression at 00:00 UTC (05:30 IST). At the same moment it crossed near Chandbali between 00:00 UTC and 01:00 UTC (05:30 IST and 06:30 IST) as a deep depression. After crossing, it weakened into a depression over the border of Chhattisgarh and Odisha, at 03:00 UTC (08:30 IST) the next day, but it managed to maintain its intensity for the rest of its lifetime, because of the prevailing monsoonal conditions. This unusual phenomenon is called the brown ocean effect.{{Cite web|url=https://www.metoffice.gov.uk/weather/learn-about/weather/types-of-weather/hurricanes/brown-ocean-effect|title=Brown ocean effect|website=www.metoffice.gov.uk|publisher=Met Office|date=|access-date=January 8, 2022}} It continued to move on its trajectory, until at 00:00 UTC of September 15, it further weakened into a well-marked low pressure area over northeastern Madhya Pradesh and its neighbourhood. The JTWC didn't tracked the system, but they did monitored as an invest.{{cite web|url=https://www.nrlmry.navy.mil/atcf_web/docs/tracks/2021/bio952021.dat|title=JTWC Best Track for Invest 95B (2021)|publisher=United States Joint Typhoon Warning Center|location=Honolulu, Hawaii|date=|access-date=January 8, 2022|archive-url=https://archive.today/20210914035454/https://www.nrlmry.navy.mil/atcf_web/docs/tracks/2021/bio952021.dat|archive-date=September 14, 2021|url-status=dead}}

The system caused vigorous monsoonal conditions over eastern India, mainly Odisha and West Bengal and central India. It led to extremely heavy rainfall over few places of Odisha, isolated places of Chhattisgarh between September 12 and 13 and over eastern Madhya Pradesh on September 14. As the system moved westwards, it interacted with another low pressure system off the coast of Gujarat caused extremely heavy rainfall over Saurashtra region of Gujarat and the Konkan division of Maharashtra on September 13. The outer bands of the system also caused extremely heavy rainfall in isolated places of West Bengal on September 14. Three fatalities have been reported, all from Odisha and 1.953 million people had been affected.{{cite web|url=https://www.indiatoday.in/india/story/people-dead-heavy-rain-odisha-record-rainfall-bhubaneswar-puri-1852471-2021-09-14|title=3 dead, over 19.53 lakh people hit by heavy rain in Odisha, record rainfall in Bhubaneswar & Puri|website=www.indiatoday.in|author=Press Trust of India|publisher=India Today|location=Bhubaneswar, Odisha|date=September 14, 2021|access-date=January 13, 2022}} Some cities recorded exceptionally heavy rainfall like Puri recorded {{convert|341|mm|in|abbr=on}} of rain, breaking the 88-year-old record which was made in 1934 and Bhubaneswar which recorded {{cvt|195|mm}} of rain, breaking the 63-year-old record which was made in 1958. A goods train which ran on the Angul{{snd}}Talcher Road rail route derailed at around 02:30 IST (20:00 UTC) and fell over a river. No one was injured.{{cite web|url=https://economictimes.indiatimes.com/industry/transportation/railways/goods-train-derails-falls-into-river-in-odisha/articleshow/86191145.cms|title=Goods train derails, falls into river in Odisha|website=economictimes.indiatimes.com|author=Press Trust of India|publisher=The Economic Times|date=September 14, 2021|access-date=January 13, 2022}} The Kolkata airport was inundated in floodwaters causing disruptions in flight's timings however no flights were cancelled.{{Cite web|author=Tamaghna Banerjee|title=Kolkata: Passengers left in a spot as rain delays 21 flights {{!}} Kolkata News - Times of India|url=https://timesofindia.indiatimes.com/city/kolkata/heavy-rains-delay-21-flights-at-kolkata-airport/articleshow/86211500.cms|access-date=September 18, 2021|website=timesofindia.indiatimes.com|publisher=The Times of India|archive-date=September 15, 2021|archive-url=https://web.archive.org/web/20210915100308/https://timesofindia.indiatimes.com/city/kolkata/heavy-rains-delay-21-flights-at-kolkata-airport/articleshow/86211500.cms|url-status=live}}

{{clr}}

{{Infobox hurricane small

|Basin=NIO

|Image=Gulab 2021-09-26 0740Z.jpg

|Track=Gulab-Shaheen 2021 track.png

|Formed=September 24

|Dissipated=September 28

|3-min winds=45

|1-min winds=40

|Pressure=992

}}

{{Main|Cyclones Gulab and Shaheen#Cyclone Gulab}}

On September 24, the JTWC noted a cyclone which was producing tropical storm-force winds located over the east-central Bay of Bengal, {{cvt|211|nmi}} south of Chittagong, Bangladesh, designating the system as 03B.{{cite JTWC|date=September 24, 2021|type=prog|category=TC|name=Three|designation=03B|no=1|url=https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|url-status=dead|archive-date=2021-09-26|archive-url=https://web.archive.org/web/20210926104834/https://www.metoc.navy.mil/jtwc/products/io0321prog.txt}} [https://wiki.chlod.net/jtwc/prog/2021-09-24-0900-io0321prog.txt Alt URL] The IMD noted the system as a low pressure area at 03:00 UTC (08:30 IST); the system formed from a cyclonic circulation which persisted over the Gulf of Martaban.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d60f9a_Tropical%20Weather%20Outlook%20based%20on%20%200300%20UTC%20of%2024.09.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 06:00 UTC of 24.09.2021 based on 03:00 UTC of 24.09.2021|date=September 24, 2021|access-date=September 24, 2021|archive-url=https://web.archive.org/web/20210924111823/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d60f9a_Tropical%20Weather%20Outlook%20based%20on%20%200300%20UTC%20of%2024.09.2021.pdf|archive-date=September 24, 2021}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_b885c2_Tropical%20Weather%20Outlook%20based%20on%20%200300%20UTC%20of%2023.09.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 06:00 UTC of 23.09.2021 based on 03:00 UTC of 23.09.2021|date=September 23, 2021|access-date=September 24, 2021|archive-url=https://web.archive.org/web/20210924130339/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_b885c2_Tropical%20Weather%20Outlook%20based%20on%20%200300%20UTC%20of%2023.09.2021.pdf|archive-date=September 24, 2021}} It was later upgraded to a well-marked low-pressure area at 11:00 UTC (16:30 IST), as it developed a cyclonic vortex at 06:00 UTC (11:30 IST).{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_0b3cef_1.%20Special_Bulletin_20210924.pdf|title=Well Marked Low Pressure Area over east-central Bay of Bengal & likely intensification into a Depression during next 12 hours|website=rsmcnewdelhi.imd.gov.in|author=Sunitha S Devi|publisher=India Meteorological Department|date=September 24, 2021|access-date=September 24, 2021|archive-url=https://web.archive.org/web/20210924112305/https://rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_0b3cef_1.%20Special_Bulletin_20210924.pdf|archive-date=September 24, 2021}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/22/22_054432_satbltn.pdf|title=Satellite Bulletin based on INSAT 3D Picture of 240600 UTC|website=rsmcnewdelhi.imd.gov.in|publisher=India Meteorological Department|date=September 24, 2021|access-date=September 24, 2021|archive-url=https://web.archive.org/web/20210924112727/https://rsmcnewdelhi.imd.gov.in/uploads/archive/22/22_054432_satbltn.pdf|archive-date=September 24, 2021}} At 15:00 UTC (20:30 IST), the IMD upgraded it to a Depression, as the convection had further organized and the clouds were moving in a curved manner. Favorable conditions such as moderate to high sea-surface temperatures, the Madden–Julian oscillation being favorable for tropical cyclone development, and low vertical wind shear allowed intensification.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_69622f_Tropical%20Weather%20Outlook%20%20based%20on%20%201200%20UTC%20of%2024.09.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 15:30 UTC of 24.09.2021 based on 12:00 UTC of 24.09.2021|website=rsmcnewdelhi.imd.gov.in|author=R.K Jenamani|publisher=India Meteorological Department|location=New Delhi, India|date=September 24, 2021|access-date=September 24, 2021|archive-url=https://web.archive.org/web/20210924155127/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_69622f_Tropical%20Weather%20Outlook%20%20based%20on%20%201200%20UTC%20of%2024.09.2021.pdf|archive-date=September 24, 2021}} By 03:00 UTC the next day, the system was upgraded to a Deep Depression, as the cloud further organized near the center. There were also the presence of warm moist air over the center of the system.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_bc233c_3.%20Tropical%20Weather%20Outlook%20%20based%20on%200000%20UTC%20of%2025.09.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 03:00 UTC of 25.09.2021 based on 00:00 UTC of 25.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Ananda Kumar Das|publisher=India Meteorological Department|location=New Delhi, India|date=September 25, 2021|access-date=September 25, 2021|archive-url=https://web.archive.org/web/20210925040409/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_bc233c_3.%20Tropical%20Weather%20Outlook%20%20based%20on%200000%20UTC%20of%2025.09.2021.pdf|archive-date=September 25, 2021}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_da2d64_4.%20Special%20Tropical%20Weather%20Outlook%20%20based%20on%200300%20UTC%20of%2025.09.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 06:00 UTC of 25.09.2021 based on 03:00 UTC of 25.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha S Devi|publisher=India Meteorological Department|location=New Delhi, India|date=September 25, 2021|access-date=September 25, 2021|archive-url=https://web.archive.org/web/20210925071842/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_da2d64_4.%20Special%20Tropical%20Weather%20Outlook%20%20based%20on%200300%20UTC%20of%2025.09.2021.pdf|archive-date=September 25, 2021}} At 15:00 UTC (20:30 IST), the IMD upgraded it to a cyclonic storm as its convection had become better organized with a defined central dense overcast.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_bbd639_Tropical%20weather%20outlook.pdf|title=Tropical Cyclone Advisory No. 1 for Cyclonic Storm Gulab issued at 15:00 UTC of 25.09.2021 based on 12:00 UTC of 25.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha S Devi|publisher=India Meteorological Department|location=New Delhi, India|date=September 25, 2021|access-date=September 25, 2021|archive-url=https://web.archive.org/web/20210925153828/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_bbd639_Tropical%20weather%20outlook.pdf|archive-date=September 25, 2021}} The system was named Gulab, which was suggested by Pakistan. The name means rose in Urdu/Hindi.{{Cite web|date=September 25, 2021|title=Cyclone Gulab, The Name Given by Pakistan, Brews in Bay of Bengal; Know What 'Gulab' Means 🔬 LatestLY|url=https://www.latestly.com/technology/science/cyclone-gulab-the-name-given-by-pakistan-brews-in-bay-of-bengal-know-what-gulab-means-2885192.html|access-date=September 25, 2021|website=www.latestly.com|publisher=Latestly|archive-date=September 25, 2021|archive-url=https://web.archive.org/web/20210925085131/https://www.latestly.com/technology/science/cyclone-gulab-the-name-given-by-pakistan-brews-in-bay-of-bengal-know-what-gulab-means-2885192.html|url-status=live}} As it continued westward, the cloud bands of Cyclone Gulab had touched the coastal regions of northern Andhra Pradesh and southern Odisha, which indicated that it had started its landfall process at about 18:00 IST (12:30 UTC) on September 26.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d5aa82_14.%20Tropical%20Cyclone%20Advisory%20No.9%20%20based%20on%201200%20UTC%20of%2026.09.2021.pdf|title=Tropical Cyclone Advisory No. 5 for Cyclonic Storm Gulab issued at 14:00 UTC of 26.09.2021 based on 12:00 UTC of 26.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha S Devi|publisher=India Meteorological Department|location=New Delhi, India|date=September 26, 2021|access-date=September 26, 2021|archive-url=https://web.archive.org/web/20210926144059/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d5aa82_14.%20Tropical%20Cyclone%20Advisory%20No.9%20%20based%20on%201200%20UTC%20of%2026.09.2021.pdf|archive-date=September 26, 2021}} By 17:00 UTC (10:30 IST), it had crossed {{cvt|20|km|round=5}} north of Kalingapatnam.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d4937b_15.%20Tropical%20Cyclone%20Advisory%20No.10%20%20based%20on%201500%20UTC%20of%2026.09.2021.pdf|title=Tropical Cyclone Advisory No. 10 for Cyclonic Storm Gulab issued at 17:00 UTC of 26.09.2021 based on 15:00 UTC of 26.09.2021|website=rsmcnewdelhi.imd.gov.in|author=R K Jenamani|publisher=India Meteorological Department|location=New Delhi, India|date=September 26, 2021|access-date=September 26, 2021|archive-url=https://web.archive.org/web/20210926164553/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d4937b_15.%20Tropical%20Cyclone%20Advisory%20No.10%20%20based%20on%201500%20UTC%20of%2026.09.2021.pdf|archive-date=September 26, 2021}} At 21:00 UTC (02:30 IST), the JTWC had issued its final warning prior to landfall.{{cite JTWC|date=September 26, 2021|access-date=September 27, 2021|type=warn|designation=03B|category=TC|name=Gulab|no=11|url=https://www.metoc.navy.mil/jtwc/products/io0321web.txt|archive-url=https://web.archive.org/web/20210926000000/https://www.metoc.navy.mil/jtwc/products/io0321web.txt|archive-date=September 26, 2021}} [https://wiki.chlod.net/jtwc/text/2021-09-26-2110-io0321web.txt Alt URL] Three hours later, the IMD downgraded it to a deep depression, as it had lost its energy after travelling over rough Indian terrain.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_2d4e63_17.%20Tropical%20Cyclone%20Advisory%20No.12%20%20based%20on%202100%20UTC%20of%2026.09.2021.pdf|title=Final Tropical Cyclone Advisory No. 12 for Cyclonic Storm Gulab issued at 23:00 UTC of 26.09.2021 based on 21:00 UTC of 26.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Ananda Kumar Das|publisher=India Meteorological Department|location=New Delhi, India|date=September 26, 2021|access-date=September 27, 2021|archive-url=https://web.archive.org/web/20210927024123/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_2d4e63_17.%20Tropical%20Cyclone%20Advisory%20No.12%20%20based%20on%202100%20UTC%20of%2026.09.2021.pdf|archive-date=September 27, 2021}} It further weakened into a depression by 20:00 IST (14:30 UTC) as it entered the state of Telangana.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_50532e_21.%20National_Bulletin_20210927_1200UTC.pdf|title=National Bulletin No. 21 for Depression (remnants of Cyclonic Storm Gulab) over north Telangana and adjoining south Chhattisgarh and Vidarbha, issued at 20:00 IST of 27.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha S Devi|publisher=India Meteorological Department|location=New Delhi, India|date=September 27, 2021|access-date=September 27, 2021|archive-url=https://web.archive.org/web/20210927145318/https://rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_50532e_21.%20National_Bulletin_20210927_1200UTC.pdf|archive-date=September 27, 2021}} It maintained its intensity as it travelled westwards until at 14:00 IST (08:30 UTC), when it weakened into a well-marked low pressure area over west Vidarbha.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_512562_25.%20National_Bulletin_20210928_0600UTC.pdf|title=National Bulletin No. 25 for Well-Marked Low Pressure Area (remnant of Cyclonic Storm Gulab) over western parts of Vidarbha, issued at 14:00 IST of 28.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha S Devi|publisher=India Meteorological Department|location=New Delhi, India|date=September 28, 2021|access-date=September 28, 2021|archive-url=https://web.archive.org/web/20210928100447/https://rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_512562_25.%20National_Bulletin_20210928_0600UTC.pdf|archive-date=September 28, 2021}} The remnant of Gulab later became Cyclone Shaheen over the Arabian Sea.

Gulab caused severe floods and landslide in several states in southern and central India killing 17 people and caused ₹20 billion (US$269 million) in damage.{{Cite web|date=October 2, 2021|title=Cyclone Gulab may have caused damages worth ₹2,000 crore|url=https://www.hindustantimes.com/india-news/cyclone-gulab-may-have-caused-damages-worth-rs-2-000-crore-101633114418467.html|access-date=October 3, 2021|publisher=The Hindustan Times|website=www.hindustantimes.com|archive-date=October 3, 2021|archive-url=https://web.archive.org/web/20211003034159/https://www.hindustantimes.com/india-news/cyclone-gulab-may-have-caused-damages-worth-rs-2-000-crore-101633114418467.html|url-status=live}} In Andhra Pradesh, heavy damage were caused by Gulab over Srikakulam and Vizianagaram districts. Communications and electricity were disrupted and uprooted trees caused congestion in roads. The city of Vizianagaram was inundated with waterlogging because of improper underground drainage system and hundreds of trees and billboards were fallen in different places.{{Cite news|date=September 27, 2021|title=Cyclone Gulab: Visakhapatnam airport faces severe waterlogging as heavy rainfall hits Andhra. Watch video|url=https://www.thehindu.com/news/national/andhra-pradesh/gulab-caused-heavy-damage-in-srikakulam-and-vizianagaram-districts/article36689353.ece|access-date=September 30, 2021|newspaper=The Hindu|archive-date=September 30, 2021|archive-url=https://web.archive.org/web/20210930105556/https://www.thehindu.com/news/national/andhra-pradesh/gulab-caused-heavy-damage-in-srikakulam-and-vizianagaram-districts/article36689353.ece|url-status=live}} In Vizag, heavy rainfall caused regional floods and gusty winds which caused uprooting of several trees.{{Cite news|date=September 27, 2021|title=Cyclone Gulab landfall {{!}} Heavy rains flood low lying areas in the Vizag; fishermen cautioned|work=The Hindu|url=https://www.thehindu.com/news/national/andhra-pradesh/cyclone-gulab-landfall-heavy-rains-flood-low-lying-areas-in-the-vizag-fishermen-cautioned/article36688795.ece|access-date=September 29, 2021|archive-date=September 29, 2021|archive-url=https://web.archive.org/web/20210929114810/https://www.thehindu.com/news/national/andhra-pradesh/cyclone-gulab-landfall-heavy-rains-flood-low-lying-areas-in-the-vizag-fishermen-cautioned/article36688795.ece|url-status=live}} The heavy rainfall also caused the inundation of the airport.{{Cite web|date=September 27, 2021|title=Cyclone Gulab: Visakhapatnam airport faces severe waterlogging as heavy rainfall hits Andhra. Watch video|url=https://www.livemint.com/news/india/cyclone-gulab-visakhapatnam-airport-faces-severe-waterlogging-as-heavy-rainfall-hits-andhra-watch-video-11632747776916.html|access-date=September 29, 2021|website=www.livemint.com|publisher=Mint|author=Press Trust of India|archive-date=September 29, 2021|archive-url=https://web.archive.org/web/20210929114808/https://www.livemint.com/news/india/cyclone-gulab-visakhapatnam-airport-faces-severe-waterlogging-as-heavy-rainfall-hits-andhra-watch-video-11632747776916.html|url-status=live}} The city recorded {{cvt|282|mm}} in 24 hours making the wettest September only behind the year 2005.{{Cite web|date=September 27, 2021|title=16 years after Cyclone Pyarr, Gulab triggers record September rain in Visakhapatnam|url=https://indianexpress.com/article/india/visakhapatnam-rain-cyclone-gulab-7536718/|access-date=September 29, 2021|website=indianexpress.com|publisher=The Indian Express|author=Anjali Marar|archive-date=September 29, 2021|archive-url=https://web.archive.org/web/20210929114808/https://indianexpress.com/article/india/visakhapatnam-rain-cyclone-gulab-7536718/|url-status=live}} Two people died because of drowning.{{Cite web|date=September 26, 2021|title=Cyclone Gulab Live Updates: 2 fishermen in Andhra Pradesh killed in Gulab storm, one missing|url=https://indianexpress.com/article/india/cyclone-gulab-live-updates-7534420/|access-date=September 26, 2021|website=indianexpress.com|publisher=The Indian Express|archive-date=September 26, 2021|archive-url=https://web.archive.org/web/20210926073325/https://indianexpress.com/article/india/cyclone-gulab-live-updates-7534420/|url-status=live}} As Gulab weakened into a deep depression, it entered Telangana and Chhattisgarh dumping enormous amounts of heavy rainfall. In Telangana especially Hyderabad, flash flooding caused disruption in traffic and severe hardships to the residents. Two people were washed away by an overflowed stream. Because of the above situation, the government of Telangana declared a holiday for all government offices, schools, and institutions.{{Cite web|date=September 27, 2021|title=Cyclone Gulab: Downpour in Parts of Telangana, Including Hyderabad; Rains to Continue This Week|publisher=The Weather Channel|url=https://weather.com/en-IN/india/monsoon/news/2021-09-28-cyclone-gulab-downpour-in-parts-of-telangana-including-hyderabad|website=weather.com|access-date=September 30, 2021|archive-date=September 30, 2021|archive-url=https://web.archive.org/web/20210930112145/https://weather.com/en-IN/india/monsoon/news/2021-09-28-cyclone-gulab-downpour-in-parts-of-telangana-including-hyderabad|url-status=live}} The heavy rainfall caused the Musi river to overflow.{{Cite web|date=September 28, 2021|title=Hyderabad's Musi River Remains Flooded; Alert for Residential Areas to Continue|publisher=The Weather Channel|url=https://weather.com/en-IN/india/monsoon/news/2021-09-29-hyderabads-musi-river-remains-flooded-residential-areas-on-alert|website=weather.com|access-date=September 30, 2021|archive-date=September 30, 2021|archive-url=https://web.archive.org/web/20210930112147/https://weather.com/en-IN/india/monsoon/news/2021-09-29-hyderabads-musi-river-remains-flooded-residential-areas-on-alert|url-status=live}} Heavy rainfall were also seen in Chhattisgarh.{{Cite web|date=September 27, 2021|title=Remnants of Cyclone Gulab to Cause Heavy Rains in Chhattisgarh|publisher=The Weather Channel|url=https://weather.com/en-IN/india/news/news/2021-09-27-cyclone-gulab-to-cause-heavy-rains-in-chattisgarh|website=weather.com|access-date=September 30, 2021|archive-date=September 30, 2021|archive-url=https://web.archive.org/web/20210930112149/https://weather.com/en-IN/india/news/news/2021-09-27-cyclone-gulab-to-cause-heavy-rains-in-chattisgarh|url-status=live}} The remnant of Cyclone Gulab, caused devastating rainfall and landslides in Maharashtra. According to the State Disaster Response Force, thirteen people and 206 livestock were killed by the flooding from eight districts of the state. Four people went missing after a Maharashtra state transport bus was swept away by an overflowing stream near Umarkhed, Maharashtra, however two of the six travellers were rescued successfully.{{Cite web|date=September 29, 2021|title=Cyclone Gulab Highlights: Heavy rains, lightning kill 13 in Maharashtra|publisher=The Indian Express|url=https://indianexpress.com/article/india/cyclone-gulab-live-updates-andhra-pradesh-telangana-rains-7538588/|website=indianexpress.com|access-date=September 30, 2021|archive-date=September 28, 2021|archive-url=https://web.archive.org/web/20210928161605/https://indianexpress.com/article/india/cyclone-gulab-live-updates-andhra-pradesh-telangana-rains-7538588/|url-status=live}}

{{clear}}

{{Infobox tropical cyclone small

|Basin=NIO

|Image=Gulab-Shaheen 2021-10-03 0930Z.jpg

|Track=Gulab-Shaheen 2021 track.png

|Formed=September 30

|Dissipated=October 4

|3-min winds=60

|1-min winds=70

|Pressure=984

}}

{{Main|Cyclones Gulab and Shaheen#Cyclone Shaheen}}

On September 29, the remnant of Cyclone Gulab entered northeastern Arabian Sea as a well-marked low pressure area.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_32bcde_1.%20Special_Bulletin_20210929.pdf|title=Well marked low pressure area over south Gujarat region & adjoining Gulf of Khambhat & likely intensification into a Depression over northeast Arabian Sea by tomorrow morning|website=rsmcnewdelhi.imd.gov.in|author=Susmitha S Devi|publisher=India Meteorological Department|location=New Delhi, India|date=September 29, 2021|access-date=September 30, 2021|archive-url=https://web.archive.org/web/20210930065455/https://rsmcnewdelhi.imd.gov.in/uploads/archive/1/1_32bcde_1.%20Special_Bulletin_20210929.pdf|archive-date=September 30, 2021}} At 17:30 UTC (23:00 IST) that same day, the JTWC issued a TCFA as it developed a well-defined convection and a low-level circulation center.{{cite JTWC|date=September 29, 2021|access-date=September 30, 2021|type=tcfa|designation=Remnant of TC 03B|url=https://www.metoc.navy.mil/jtwc/products/io0321web.txt|archive-url=https://web.archive.org/web/20210929000000/https://www.metoc.navy.mil/jtwc/products/io0321web.txt|archive-date=September 29, 2021}} [https://wiki.chlod.net/jtwc/text/2021-09-29-1740-io0321web.txt Alt URL] At 00:00 UTC (05:30 IST) next day, the IMD upgraded the system to a depression over the Gulf of Kutch, thus designating it as ARB 02. INSAT 3D satellite imagery showed that the convection had increased near its center.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_a1ec18_1.%20Tropical%20Weather%20Outlook%20%20based%20on%200000%20UTC%20of%2030.09.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 03:00 UTC of 30.09.2021 based on 00:00 UTC of 30.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Susmitha S Devi|publisher=India Meteorological Department|location=New Delhi, India|date=September 30, 2021|access-date=September 30, 2021|archive-url=https://web.archive.org/web/20210930062321/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_a1ec18_1.%20Tropical%20Weather%20Outlook%20%20based%20on%200000%20UTC%20of%2030.09.2021.pdf|archive-date=September 30, 2021}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_a1e345_2.%20Tropical%20Weather%20Outlook%20%20based%20on%200300%20UTC%20of%2030.09.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 06:00 UTC of 30.09.2021 based on 03:00 UTC of 30.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Susmitha S Devi|publisher=India Meteorological Department|location=New Delhi, India|date=September 30, 2021|access-date=September 30, 2021|archive-url=https://web.archive.org/web/20210930072241/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_a1e345_2.%20Tropical%20Weather%20Outlook%20%20based%20on%200300%20UTC%20of%2030.09.2021.pdf|archive-date=September 30, 2021}} At 21:00 UTC (02:30 IST), the JTWC upgraded it to a tropical storm, reassigning it the designation 03B as the agency viewed Shaheen as a continuation of Cyclone Gulab.{{cite JTWC|date=September 30, 2021|access-date=October 1, 2021|type=prog|category=TC|designation=03B|name=Gulab|no=12|url=https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|archive-url=https://web.archive.org/web/20210930000000/https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|archive-date=September 30, 2021}} [https://wiki.chlod.net/jtwc/prog/2021-09-30-2130-io0321prog.txt Alt URL] At the same moment, the IMD upgraded it to a deep depression.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_3838e5_5.%20Tropical%20Weather%20Outlook%20%20based%20on%201800%20UTC%20of%2030.09.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 21:00 UTC of 30.09.2021 based on 18:00 UTC of 30.09.2021|website=rsmcnewdelhi.imd.gov.in|author=Shibin Balkrishnan|publisher=India Meteorological Department|location=New Delhi, India|date=September 30, 2021|access-date=October 1, 2021|archive-url=https://web.archive.org/web/20211001030242/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_3838e5_5.%20Tropical%20Weather%20Outlook%20%20based%20on%201800%20UTC%20of%2030.09.2021.pdf|archive-date=October 1, 2021}} Six hours later, the system was further upgraded to a cyclonic storm, as spiral cloudbands were seen wrapping over the storm's low-level circulation.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_604936_6.%20Tropical%20Cyclone%20Advisory-1%20%20based%20on%200000%20UTC%20of%2001.10.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 03:00 UTC of 01.10.2021 based on 00:00 UTC of 01.10.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha Devi S|publisher=India Meteorological Department|location=New Delhi, India|date=October 1, 2021|access-date=October 1, 2021|archive-url=https://web.archive.org/web/20211001041158/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_604936_6.%20Tropical%20Cyclone%20Advisory-1%20%20based%20on%200000%20UTC%20of%2001.10.2021.pdf|archive-date=October 1, 2021}} The system thus received the name Shaheen, which was contributed by Qatar. At 15:00 UTC (20:30 IST), the IMD further upgraded it to a severe cyclonic storm, as the clouds had become well-organized moving with a defined curved pattern.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_09700c_10.%20Tropical%20Cyclone%20Advisory-5%20based%20on%201200%20UTC%20of%2001.10.2021.pdf|title=Tropical Cyclone Advisory No. 5 for Severe Cyclonic Storm Shaheen issued at 15:00 UTC of 01.10.2021 based on 12:00 UTC of 01.10.2021|website=rsmcnewdelhi.imd.gov.in|author=R.K Jenamani|publisher=India Meteorological Department|location=New Delhi, India|date=October 1, 2021|access-date=October 1, 2021|archive-url=https://web.archive.org/web/20211001152753/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_09700c_10.%20Tropical%20Cyclone%20Advisory-5%20based%20on%201200%20UTC%20of%2001.10.2021.pdf|archive-date=October 1, 2021}} At 03:00 UTC (08:30 IST) the next day, the JTWC upgraded it to a Category 1-equivalent tropical cyclone as it developed an eye-like feature. However, it struggled for further development, due to lack of convection.{{cite JTWC|date=October 2, 2021|type=prog|category=TC|designation=03B|name=Shaheen-Gulab|no=17|url=https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|archive-url=https://web.archive.org/web/20211002000000/https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|archive-date=October 2, 2021}} [https://wiki.chlod.net/jtwc/prog/2021-10-02-0300-io0321prog.txt Alt URL] By 06:00 UTC (11:30 IST), the cyclone developed a defined but ragged eye.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_5d20a7_15.%20Tropical%20Cyclone%20Advisory-10%20based%20on%200300%20UTC%20of%2002.10.2021.pdf|title=Tropical Cyclone Advisory No. 10 for Severe Cyclonic Storm Shaheen issued at 06:00 UTC of 02.10.2021 based on 03:00 UTC of 02.10.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha Devi S|publisher=India Meteorological Department|location=New Delhi, India|date=October 2, 2021|access-date=October 2, 2021|archive-url=https://web.archive.org/web/20211002111109/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_5d20a7_15.%20Tropical%20Cyclone%20Advisory-10%20based%20on%200300%20UTC%20of%2002.10.2021.pdf|archive-date=October 2, 2021}} At 09:00 UTC (14:30 IST), the JTWC downgraded it to a tropical storm,{{cite JTWC|date=October 2, 2021|type=prog|category=TC|designation=03B|name=Shaheen-Gulab|no=18|url=https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|archive-url=https://web.archive.org/web/20211002000000/https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|archive-date=October 2, 2021}} [https://wiki.chlod.net/jtwc/prog/2021-10-02-0850-io0321prog.txt Alt URL] but six hours later, the JTWC re-upgraded it to a Category 1 tropical cyclone.{{cite JTWC|date=October 2, 2021|access-date=October 3, 2021|type=prog|category=TC|designation=03B|name=Shaheen-Gulab|no=19|url=https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|archive-url=https://web.archive.org/web/20211003000000/https://www.metoc.navy.mil/jtwc/products/io0321prog.txt|archive-date=October 3, 2021}} [https://wiki.chlod.net/jtwc/prog/2021-10-02-1450-io0321prog.txt Alt URL] Between 19:00 UTC and 20:00 UTC (00:30 IST and 01:30 IST), Shaheen made landfall over the northern Oman coast,{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_c8aeac_29.%20Tropical%20Cyclone%20Advisory-24%20based%20on%202100%20UTC%20of%2003.10.2021.pdf|title=Tropical Cyclone Advisory No. 24 for Severe Cyclonic Storm Shaheen issued at 22:30 UTC of 03.10.2021 based on 21:00 UTC of 03.10.2021|website=rsmcnewdelhi.imd.gov.in|author=D.R Pattanaik|publisher=India Meteorological Department|location=New Delhi, India|date=October 3, 2021|access-date=October 4, 2021|archive-url=https://web.archive.org/web/20211004024530/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_c8aeac_29.%20Tropical%20Cyclone%20Advisory-24%20based%20on%202100%20UTC%20of%2003.10.2021.pdf|archive-date=October 4, 2021}} making it one of the rare cyclones to strike this region since 1890.{{cite twitter|user=metofficestorms|number=1444647588729344000|title=Severe Cyclonic Storm #Shaheen is expected to make landfall west of #Muscat, the capital of #Oman in the coming few hours. This will be the first cyclone to make landfall on this part of the northern coast of Oman since a deadly cyclone in the year 1890.}}{{Cite news|date=October 3, 2021|title=Oman braces for historic landfall from Tropical Cyclone Shaheen|url=https://www.washingtonpost.com/weather/2021/10/03/tropical-cyclone-shaheen-oman-landfall/|access-date=October 4, 2021|author=James Samenow|newspaper=The Washington Post|archive-date=October 4, 2021|archive-url=https://web.archive.org/web/20211004025859/https://www.washingtonpost.com/weather/2021/10/03/tropical-cyclone-shaheen-oman-landfall/|url-status=live}} At 21:00 UTC (02:30 IST), the JTWC issued its final warning for the storm as it made landfall.{{cite JTWC|date=October 3, 2021|access-date=October 4, 2021|type=warn|category=TC|designation=03B|name=Shaheen-Gulab|no=24-FINAL|url=https://www.metoc.navy.mil/jtwc/products/io0321web.txt|archive-url=https://web.archive.org/web/20211003000000/https://www.metoc.navy.mil/jtwc/products/io0321web.txt|archive-date=October 3, 2021}} [https://wiki.chlod.net/jtwc/text/2021-10-03-2000-io0321web.txt Alt URL] After making landfall, Shaheen underwent a rapid weakening because of the dry landmass of the Arabian Desert. From 00:00 UTC till 12:00 UTC, it rapidly weakened from a severe cyclonic storm to a well-marked low pressure area. Satellite imagery showed that after making landfall, the cloud mass had quickly become disorganized and the center became less defined.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_830baf_30.%20Tropical%20Cyclone%20Advisory-25%20based%20on%200000%20UTC%20of%2004.10.2021.pdf|title=Tropical Cyclone Advisory No. 25 for Cyclonic Storm Shaheen issued at 02:30 UTC of 04.10.2021 based on 00:00 UTC of 04.10.2021|website=rsmcnewdelhi.imd.gov.in|author=D.R Pattanaik|publisher=India Meteorological Department|location=New Delhi, India|date=October 4, 2021|access-date=October 4, 2021|archive-url=https://web.archive.org/web/20211004031751/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_830baf_30.%20Tropical%20Cyclone%20Advisory-25%20based%20on%200000%20UTC%20of%2004.10.2021.pdf|archive-date=October 4, 2021}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_cba278_31.%20Special%20Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2004.10.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 06:00 UTC of 04.10.2021 based on 03:00 UTC of 04.10.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha Devi S|publisher=India Meteorological Department|location=New Delhi, India|date=October 4, 2021|access-date=October 4, 2021|archive-url=https://web.archive.org/web/20211004062427/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_cba278_31.%20Special%20Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2004.10.2021.pdf|archive-date=October 4, 2021}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_bd6107_33.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%2004.10.2021.pdf|title=Final Special Tropical Weather Outlook for the North Indian Ocean (the Bay of Bengal and the Arabian Sea) issued at 14:00 UTC of 04.10.2021 based on 12:00 UTC of 04.10.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha Devi S|publisher=India Meteorological Department|location=New Delhi, India|date=October 4, 2021|access-date=October 5, 2021|archive-url=https://web.archive.org/web/20211005030205/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_bd6107_33.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%2004.10.2021.pdf|archive-date=October 5, 2021}}

Cyclone Shaheen caused devastating effects mainly in Oman and Iran, killing 14 people and caused a loss of OMR200 million (US$520 million), mainly in Oman.{{Cite news|date=December 12, 2021|title=Cyclone Shaheen damage in Oman pegged at OMR200 million|url=https://timesofoman.com/article/110471-cyclone-shaheen-damage-in-oman-pegged-at-omr200-million|access-date=December 15, 2021|website=Times of Oman|language=en}} The precursor of Cyclone Shaheen caused heavy to very heavy rainfall in parts of Gujarat.{{cite web|url=https://timesofindia.indiatimes.com/city/ahmedabad/gulab-shaheen-when-a-rose-turns-into-a-falcon/articleshow/86663596.cms|title=Cyclone Gulab turns into Shaheen|author=Parth Shastri|work=The Times of India|date=October 1, 2021|access-date=October 11, 2021|archive-date=October 11, 2021|archive-url=https://web.archive.org/web/20211011094920/https://timesofindia.indiatimes.com/city/ahmedabad/gulab-shaheen-when-a-rose-turns-into-a-falcon/articleshow/86663596.cms|url-status=live}} As the cyclone strengthened, it moved along the Iranian coast generating dust storms which affected the province of Sistan and Baluchestan. Due to the dust storm caused by the cyclone, many people went to hospital as they suffered of eye and respiratory problems. Two fisherman was found dead out of the five fishermen that went missing. In Oman, the cyclone caused widespread heavy rainfall that the country had never seen. Because of the dry landmass, it couldn't absorb water quickly, causing deadly flash flooding.{{Cite web|date=October 6, 2021|title=Severe flooding overwhelms Oman following historic landfall by Cyclone Shaheen|url=https://www.accuweather.com/en/hurricane/oman-tropical-cyclone-shaheen-landfall-flooding/1027547|access-date=October 11, 2021|author=Mary Gilbert|publisher=AccuWeather|website=www.accuweather.com|archive-date=October 7, 2021|archive-url=https://web.archive.org/web/20211007045206/https://www.accuweather.com/en/hurricane/oman-tropical-cyclone-shaheen-landfall-flooding/1027547|url-status=live}} Most of the damage happened in the region of Batineh, which experienced wind up to {{cvt|60|kn|round=5}} and waves up to {{cvt|12|m}}.{{Cite web|date=October 5, 2021|title=Oman assesses Cyclone Shaheen damage|url=https://www.thenationalnews.com/gulf-news/2021/10/05/cyclone-shaheen-clean-up-may-cost-oman-up-to-125-million/|access-date=October 11, 2021|author=Saleh Al Shaibany|publisher=The National News|website=www.thenationalnews.com|archive-date=October 7, 2021|archive-url=https://web.archive.org/web/20211007060822/https://www.thenationalnews.com/gulf-news/2021/10/05/cyclone-shaheen-clean-up-may-cost-oman-up-to-125-million/|url-status=live}}{{Cite web|date=October 3, 2021|title=Cyclone Shaheen hits Oman with ferocious winds, killing three|url=https://www.reuters.com/world/middle-east/cyclone-shaheen-approaches-oman-flights-delayed-2021-10-03/|access-date=October 3, 2021|publisher=Reuters|website=www.reuters.com|archive-date=October 3, 2021|archive-url=https://web.archive.org/web/20211003082445/https://www.reuters.com/world/middle-east/cyclone-shaheen-approaches-oman-flights-delayed-2021-10-03/|url-status=live}} It killed 12 people in Oman alone.{{Cite web|date=October 4, 2021|title=Death toll in Cyclone Shaheen now 13 as storm churns in Oman|url=https://apnews.com/article/middle-east-iran-dubai-united-arab-emirates-storms-40267d410d7cb3a10d1f023dbc77b11c|access-date=October 8, 2021|author=Jon Gambrell|publisher=Associated Press|website=apnews.com|archive-date=October 5, 2021|archive-url=https://web.archive.org/web/20211005140452/https://apnews.com/article/middle-east-iran-dubai-united-arab-emirates-storms-40267d410d7cb3a10d1f023dbc77b11c|url-status=live}}{{Cite web|date=October 7, 2021|title=Death toll in Cyclone Shaheen rises to 14 after body found|url=https://apnews.com/article/oman-middle-east-storms-typhoons-floods-1b4e8152dfe20a7dbbc413b00d0ee353|access-date=October 8, 2021|publisher=Associated Press|website=apnews.com|archive-date=October 7, 2021|archive-url=https://web.archive.org/web/20211007230110/https://apnews.com/article/oman-middle-east-storms-typhoons-floods-1b4e8152dfe20a7dbbc413b00d0ee353|url-status=live}} In United Arab Emirates, the country experienced light rainfall in parts of Dubai, Al Ain and Ajman. Dust storms were also reported which reduced visibility.{{cite web|url=https://www.khaleejtimes.com/news/weather/tropical-storm-shaheen-rains-in-uae-dust-storm-alert-issued|title=Tropical storm Shaheen: Rains in UAE; dust storm alert issued|publisher=Khaleej Times|date=October 4, 2021|access-date=October 11, 2021|archive-date=October 10, 2021|archive-url=https://web.archive.org/web/20211010215115/https://www.khaleejtimes.com/news/weather/tropical-storm-shaheen-rains-in-uae-dust-storm-alert-issued|url-status=live}} The remnant of Cyclone Shaheen caused heavy rainfall in Yemen and damaging historical sites. Reports of around 20 vehicles had been washed away by flash flooding.{{Cite web|date=October 7, 2021|title=Cyclone Shaheen damages cultural heritage buildings in Yemen: Source|url=https://www.aninews.in/news/world/middle-east/cyclone-shaheen-damages-cultural-heritage-buildings-in-yemen-source20211007231207/|access-date=October 11, 2021|publisher=Asian News International|website=www.aninews.in|archive-date=October 11, 2021|archive-url=https://web.archive.org/web/20211011115723/https://www.aninews.in/news/world/middle-east/cyclone-shaheen-damages-cultural-heritage-buildings-in-yemen-source20211007231207/|url-status=live}}

{{clear}}

{{Infobox tropical cyclone small

|Basin=NIO

|Image=ARB 03 2021-11-07 0811Z.jpg

|Track=ARB03 2021 track.png

|Formed=November 7

|Dissipated=November 9

|3-min winds=25

|1-min winds=

|Pressure=1002

}}

On October 27, a cyclonic circulation spawned a low pressure area over the southern Bay of Bengal. The low travelled westward, tracking over Kanyakumari before emerging over the southeastern Arabian Sea by November 3. The low later turned north-northwestward, developing into a well-marked low pressure area by November 6. Warm sea surface temperatures of {{cvt|28|–|29|C|F}}, little dry air, and moderate wind shear allowed the system to further organize to a depression by 03:00 UTC on November 7. Throughout the next day, the depression gradually curve southwestward as it was steered by easterly and northeasterly winds in the mid and upper troposphere. Simultaneously, an increase in wind shear led to gradual weakening, eventually causing the system to degenerate into a well-marked low pressure area over the central Arabian Sea by 00:00 UTC on November 9.{{cite report |url=https://rsmcnewdelhi.imd.gov.in/download.php?path=uploads/report/26/26_450e68_Preliminary%20Report%20on%20Depression%20over%20AS%207%20Nov-9%20Nov%202021.pdf |title=Depression over eastcentral Arabian Sea during (7th– 9th November 2021): A Report |publisher=India Meteorological Department |access-date=4 September 2024 }} The JTWC also tracked the system, from 18:00 UTC (23:30 IST) of November 4 while located at {{Convert|537|nmi}} south-southwest of Mumbai until the same time of November 6.{{Cite JTWC|date=November 6, 2021|access-date=November 9, 2021|title=Significant Tropical Weather Advisory for the Indian Ocean|url=https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-url=https://web.archive.org/web/20211106000000/https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-date=November 6, 2021|type=}} [https://wiki.chlod.net/jtwc/text/2021-11-06-1800-abioweb.txt Alt URL]{{Cite JTWC|date=November 6, 2021|access-date=November 9, 2021|title=Significant Tropical Weather Advisory for the Indian Ocean|url=https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-url=https://web.archive.org/web/20211106000000/https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-date=November 6, 2021|type=}} [https://wiki.chlod.net/jtwc/text/2021-11-04-2140-abioweb.txt Alt URL]

{{clr}}

{{Infobox tropical cyclone small

|Basin=NIO

|Image=BOB 05 2021-11-11 0830Z.jpg

|Track=BOB05 2021 track.png

|Formed=November 10

|Dissipated=November 12

|3-min winds=25

|1-min winds=40

|Pressure=998

}}

{{see also|2021 South India floods}}

On November 6, the IMD noted the formation of a cyclonic circulation over southeastern Bay of Bengal near Sumatra.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_20fb48_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2006.11.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean issued at 06:00 UTC of 06.11.2021 based on 03:00 UTC of 06.11.2021|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 6, 2021|access-date=November 11, 2021|archive-url=https://web.archive.org/web/20211108121500/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_20fb48_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2006.11.2021.pdf|archive-date=November 8, 2021}} Two days later at 13:30 UTC (19:00 IST), the JTWC started tracking the same system as Invest 91B.{{cite JTWC|date=November 8, 2021|access-date=November 11, 2021|type=|title=Tropical Weather Advisory for the Indian Ocean Reissued|url=https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-url=https://web.archive.org/web/20211108000000/https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-date=November 8, 2021}} [https://wiki.chlod.net/jtwc/text/2021-11-08-1340-abioweb.txt Alt URL] On November 9, under the influence of the cyclonic circulation, a low-pressure area formed over the same area.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_c54df7_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2009.11.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean issued at 06:00 UTC of 09.11.2021 based on 03:00 UTC of 09.11.2021|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 9, 2021|access-date=November 11, 2021|archive-url=https://web.archive.org/web/20211109225305/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_c54df7_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2009.11.2021.pdf|archive-date=November 9, 2021}} On the next day, it was upgraded to a well-marked low pressure area after noting a formation of a defined vortex in associated with the system.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_c7391e_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2010.11.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean issued at 06:00 UTC of 10.11.2021 based on 03:00 UTC of 10.11.2021|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 10, 2021|access-date=November 11, 2021|archive-url=https://web.archive.org/web/20211111030207/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_c7391e_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2010.11.2021.pdf|archive-date=November 11, 2021}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/22/22_731b38_satbltn.pdf|title=Satellite Bulletin Based on INSAT 3D Imagery of 091630 UTC|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 10, 2021|access-date=November 11, 2021|archive-url=https://web.archive.org/web/20211109225237/https://rsmcnewdelhi.imd.gov.in/uploads/archive/22/22_731b38_satbltn.pdf|archive-date=November 9, 2021}} At 15:00 UTC (21:30 IST), the IMD further upgraded it to a depression as its convective structure had improved significantly.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_5f8ee8_1.Special%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%2010.11.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean issued at 15:00 UTC of 10.11.2021 based on 12:00 UTC of 10.11.2021|website=rsmcnewdelhi.gov.in|author=R.K Jenamani|publisher=India Meteorological Department|location=New Delhi, India|date=November 10, 2021|access-date=November 11, 2021|archive-url=https://web.archive.org/web/20211111025712/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_5f8ee8_1.Special%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%2010.11.2021.pdf|archive-date=November 11, 2021}} Later at 19:30 UTC (01:00 IST), the JTWC issued a TCFA for system.{{cite JTWC|date=November 10, 2021|access-date=November 11, 2021|type=tcfa|designation=91B|url=https://www.metoc.navy.mil/jtwc/products/io9121web.txt|archive-url=https://web.archive.org/web/20211110000000/https://www.metoc.navy.mil/jtwc/products/io9121web.txt|archive-date=November 10, 2021}} [https://wiki.chlod.net/jtwc/text/2021-11-10-1940-io9121web.txt Alt URL] At 09:00 UTC of November 11, the JTWC declared it as a tropical cyclone and designated as 04B.{{cite JTWC|date=November 11, 2021|type=prog|category=TC|designation=04B|name=Four|no=1|url=https://www.metoc.navy.mil/jtwc/products/io0421prog.txt|archive-url=https://web.archive.org/web/20211111000000/https://www.metoc.navy.mil/jtwc/products/io0421prog.txt|archive-date=November 11, 2021}} [https://wiki.chlod.net/jtwc/prog/2021-11-11-0820-io0421prog.txt Alt URL] However, the system could not further intensify as it was already near to the coast and high wind shear produced by an upper tropospheric ridge. Between 12:00 and 13:00 UTC (17:30 and 18:30 IST), the system made landfall near to Chennai,{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d824bb_6.%20Special%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%2011.11.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean issued at 15:00 UTC of 11.11.2021 based on 12:00 UTC of 11.11.2021|website=rsmcnewdelhi.gov.in|author=Sunitha Devi S|publisher=India Meteorological Department|location=New Delhi, India|date=November 11, 2021|access-date=November 12, 2021|archive-url=https://web.archive.org/web/20211112032411/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d824bb_6.%20Special%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%2011.11.2021.pdf|archive-date=November 12, 2021}} and by 00:00 UTC (05:30 IST) the next day the system weakened into a well-marked low pressure area.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_059b40_8.%20Special%20Tropical%20Weather%20Outlook%20based%20on%200000%20UTC%20of%2012.11.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean issued at 02:30 UTC of 12.11.2021 based on 00:00 UTC of 12.11.2021|website=rsmcnewdelhi.gov.in|author=Shashi Kant|publisher=India Meteorological Department|location=New Delhi, India|date=November 12, 2021|access-date=November 12, 2021|archive-url=https://web.archive.org/web/20211112032343/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_059b40_8.%20Special%20Tropical%20Weather%20Outlook%20based%20on%200000%20UTC%20of%2012.11.2021.pdf|archive-date=November 12, 2021}} The JTWC issued its final advisory at 15:00 UTC of November 11.{{cite JTWC|date=November 11, 2021|access-date=November 12, 2021|type=warn|category=TC|designation=04B|name=Four|no=2-FINAL|url=https://www.metoc.navy.mil/jtwc/products/io0421web.txt|archive-url=https://web.archive.org/web/20211111000000/https://www.metoc.navy.mil/jtwc/products/io0421web.txt|archive-date=November 11, 2021}} [https://wiki.chlod.net/jtwc/text/2021-11-11-1350-io0421web.txt Alt URL]

The depression further worsened the floods that occurred in Tamil Nadu and Andhra Pradesh. It took lives of 16 people in India and 25 people in Sri Lanka.{{Cite web|agency=Reuters|title=At least 41 killed as heavy rains hit southern India and Sri Lanka|url=https://www.cnn.com/2021/11/10/asia/sri-lanka-india-rain-deaths-intl-hnk/index.html|date=November 12, 2021|access-date=November 18, 2021|website=www.cnn.com|publisher=Cable News Network|archive-date=November 12, 2021|archive-url=https://web.archive.org/web/20211112104755/https://www.cnn.com/2021/11/10/asia/sri-lanka-india-rain-deaths-intl-hnk/index.html|url-status=live}}

{{clear}}

{{Infobox tropical cyclone small

|Basin=NIO

|Image=BOB_06_2021-11-18_0712Z_(cropped).jpg

|Track=BOB06 2021 track.png

|Formed=November 18

|Dissipated=November 19

|3-min winds=25

|1-min winds=

|Pressure=1000

}}

On November 12, a cyclonic circulation persisted over the Gulf of Thailand and the adjoining Malay Peninsula,{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_2f6825_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2012.11.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean at 06:00 UTC of 12.11.2021 based on 03:00 UTC of 12.11.2021|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 12, 2021|access-date=November 20, 2021|archive-url=https://web.archive.org/web/20211120101109/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_2f6825_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2012.11.2021.pdf|archive-date=November 20, 2021}} which on the next day became a low pressure area by the IMD and Invest 92B by the JTWC.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_cb45b7_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2013.11.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean at 06:00 UTC of 13.11.2021 based on 03:00 UTC of 13.11.2021|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 13, 2021|access-date=November 20, 2021|archive-url=https://web.archive.org/web/20211120101115/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_cb45b7_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2013.11.2021.pdf|archive-date=November 20, 2021}}{{cite JTWC|date=November 13, 2021|access-date=November 20, 2021|type=|title=Significant Tropical Weather Advisory for the Indian Ocean Reissued|url=https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-url=https://web.archive.org/web/20211113000000/https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-date=November 13, 2021}} [https://wiki.chlod.net/jtwc/text/2021-11-13-0300-abioweb.txt Alt URL] The IMD and the JTWC previously forecasted that it would become a depression by November 15 and further intensify on November 18 as it reaches the coast of Andhra Pradesh. However both the agencies downgraded to nil chance of becoming a depression on November 15, because of a formation of another low pressure system over the Arabian Sea and the formation of a trough to the south of the system over the east of the equatorial Indian Ocean, which blocked the inflow of warm moist winds to the center of the system.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_467753_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2015.11.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean at 07:00 UTC of 15.11.2021 based on 03:00 UTC of 15.11.2021|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 15, 2021|access-date=November 20, 2021|archive-url=https://web.archive.org/web/20211120101740/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_467753_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2015.11.2021.pdf|archive-date=November 20, 2021}}{{cite JTWC|date=November 15, 2021|access-date=November 20, 2021|type=|title=Significant Tropical Weather Advisory for the Indian Ocean Reissued|url=https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-url=https://web.archive.org/web/20211115000000/https://www.metoc.navy.mil/jtwc/products/abioweb.txt|archive-date=November 15, 2021}} [https://wiki.chlod.net/jtwc/text/2021-11-15-1250-abioweb.txt Alt URL] As the low pressure area meandered westwards towards the Tamil Nadu coast, the system rapidly intensified into a depression by 07:00 UTC (12:30 IST) of November 18, as its convection rapidly consolidated and formed a distinct low-level center. By the same time, the JTWC issued a TCFA on the system and started to retrack.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_2e4b6f_1.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2018.11.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean at 07:00 UTC of 18.11.2021 based on 03:00 UTC of 18.11.2021|author=Sunitha Devi|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 18, 2021|access-date=November 20, 2021|archive-url=https://web.archive.org/web/20211118073417/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_2e4b6f_1.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%2018.11.2021.pdf|archive-date=November 18, 2021}}{{cite JTWC|date=November 18, 2021|access-date=November 20, 2021|type=tcfa|designation=92B|url=https://www.metoc.navy.mil/jtwc/products/io9221web.txt|url-status=dead|archive-date=2021-05-14|archive-url=https://web.archive.org/web/20210514075532/https://www.metoc.navy.mil/jtwc/products/io9221web.txt}} [https://wiki.chlod.net/jtwc/text/2021-11-17-2030-io9221web.txt Alt URL] Between 21:30 and 22:30 UTC (03:00 and 04:00 IST) of the same day, the depression crossed north of Pondicherry,{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_85c7ff_5.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%200000%20UTC%20of%2019.11.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean at 02:15 UTC of 19.11.2021 based on 00:00 UTC of 19.11.2021|author=S.P Singh|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 19, 2021|access-date=November 20, 2021|archive-url=https://web.archive.org/web/20211120111120/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d21b44_7.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%200600%20UTC%20of%2019.11.2021%281%29.pdf|archive-date=November 20, 2021}} and by 08:00 UTC (13:30 IST) the system weakened into a well-marked low pressure area.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d21b44_7.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%200600%20UTC%20of%2019.11.2021(1).pdf|title=Special Tropical Weather Outlook for the North Indian Ocean at 08:00 UTC of 19.11.2021 based on 06:00 UTC of 19.11.2021|author=R.K Jenamani|website=rsmcnewdelhi.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=November 19, 2021|access-date=November 20, 2021|archive-url=https://web.archive.org/web/20211120111546/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_85c7ff_5.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%200000%20UTC%20of%2019.11.2021.pdf|archive-date=November 20, 2021}} The JTWC cancelled the TCFA as it made landfall.{{cite JTWC|date=November 18, 2021|access-date=November 20, 2021|type=tcfa|designation=92B|cancelled=1|url=https://www.metoc.navy.mil/jtwc/products/io9221web.txt|url-status=dead|archive-date=2021-05-14|archive-url=https://web.archive.org/web/20210514075532/https://www.metoc.navy.mil/jtwc/products/io9221web.txt}} [https://wiki.chlod.net/jtwc/text/2021-11-17-2030-io9221web.txt Alt URL]

{{clr}}

{{Infobox tropical cyclone small

|Basin=NIO

|Image=Jawad 2021-12-03 0734Z.jpg

|Track=Jawad 2021 track.png

|Formed=December 2

|Dissipated=December 6

|3-min winds=40

|1-min winds=35

|Pressure=1000

}}

{{main|Cyclone Jawad}}

On November 28, the JTWC and the JMA acknowledged a formation of an area of low pressure, which they dubbed as Invest 94W over the South China Sea, which was located {{cvt|251|nmi}} from Ho Chi Minh City.{{cite JTWC|date=November 28, 2021|access-date=December 3, 2021|type=|title=Significant Tropical Weather Advisory for the Western and South Pacific Oceans|url=https://www.metoc.navy.mil/jtwc/products/abpwweb.txt|archive-url=https://web.archive.org/web/20211128000000/https://www.metoc.navy.mil/jtwc/products/abpwweb.txt|archive-date=November 28, 2021}} [https://wiki.chlod.net/jtwc/text/2021-11-28-0630-abpwweb.txt Alt URL]{{Cite web|url=https://www.wis-jma.go.jp/d/o/RJTD/Alphanumeric/Warning/Warnings_and_weather_summary/20211128/180000/A_WWJP27RJTD281800_C_RJT|title=JMA Warning and Summary 281800|publisher=Japan Meteorological Agency|location=Tokyo, Japan|date=November 28, 2021|access-date=November 29, 2021|archive-url=https://archive.today/20211129023841/https://www.wis-jma.go.jp/d/o/RJTD/Alphanumeric/Warning/Warnings_and_weather_summary/20211128/180000/A_WWJP27RJTD281800_C_RJTD_20211128201603_85.txt|archive-date=November 29, 2021|url-status=live}} Two days later, at 12:00 UTC (17:30 IST) on November 30, the system crossed into the Andaman Sea, and the IMD started to monitor the system as a low-pressure area.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_9565ee_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%20%2001.12.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean, issued at 06:00 UTC of 01.12.2021 based on 00:00 UTC of 01.12.2021|website=rsmcnewdelhi.imd.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=December 1, 2021|access-date=December 3, 2021|archive-url=https://web.archive.org/web/20211203125923/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_9565ee_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%20%2001.12.2021.pdf|archive-date=December 3, 2021}} On December 2, at 00:00 UTC (05:30 IST), the system further intensified into a well-marked low-pressure area, as the department found that the storm's thunderstorms had been organizing over the past day, with a distinct shear pattern.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d7c3e6_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%20%2002.12.2021.pdf|title=Tropical Weather Outlook for the North Indian Ocean, issued at 06:00 UTC of 02.12.2021 based on 00:00 UTC of 02.12.2021|website=rsmcnewdelhi.imd.gov.in|publisher=India Meteorological Department|location=New Delhi, India|date=December 2, 2021|access-date=December 3, 2021|archive-url=https://web.archive.org/web/20211203060511/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d7c3e6_Tropical%20Weather%20Outlook%20based%20on%200300%20UTC%20of%20%2002.12.2021.pdf|archive-date=December 3, 2021}} Shortly afterward, the JTWC issued a TCFA for the system.{{cite JTWC|date=December 2, 2021|access-date=December 3, 2021|type=tcfa|designation=94W|url=https://www.metoc.navy.mil/jtwc/products/wp9421web.txt|archive-url=https://web.archive.org/web/20211202000000/https://www.metoc.navy.mil/jtwc/products/wp9421web.txt|archive-date=December 2, 2021}} [https://wiki.chlod.net/jtwc/text/2021-12-02-0230-wp9421web.txt Alt URL] Later that day, at 12:00 UTC (17:30 IST), the system intensified into a depression, with the IMD designating the system as BOB 07, after the storm's convection organized further.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_12b09d_1.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%20%2002.12.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean, issued at 15:00 UTC of 02.12.2021 based on 12:00 UTC of 02.12.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha Devi. S|publisher=India Meteorological Department|location=New Delhi, India|date=December 2, 2021|access-date=December 3, 2021|archive-url=https://web.archive.org/web/20211203060522/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_12b09d_1.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%20%2002.12.2021.pdf|archive-date=December 3, 2021}} By the next day, at 03:00 UTC (08:30 IST), the system further intensified into a deep depression.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_2b1432_3.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%200000%20UTC%20of%20%2003.12.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean, issued at 03:00 UTC of 03.12.2021 based on 00:00 UTC of 03.12.2021|website=rsmcnewdelhi.imd.gov.in|author=Shobit Katiyar|publisher=India Meteorological Department|location=New Delhi, India|date=December 3, 2021|access-date=December 3, 2021|archive-url=https://web.archive.org/web/20211203060532/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_2b1432_3.%20SPECIAL%20Tropical%20Weather%20Outlook%20based%20on%200000%20UTC%20of%20%2003.12.2021.pdf|archive-date=December 3, 2021}} At the same time, the JTWC declared it a tropical cyclone, assigning a tropical storm intensity to the system, as the cyclone developed a well-defined mid-level circulation, though its low-level circulation center was displaced to the northwest.{{cite JTWC|date=December 3, 2021|access-date=December 3, 2021|type=prog|no=1|category=TC|designation=05B|name=Five|url=https://www.metoc.navy.mil/jtwc/products/io0521prog.txt|archive-url=https://web.archive.org/web/20211203000000/https://www.metoc.navy.mil/jtwc/products/io0521prog.txt|archive-date=December 3, 2021}} [https://wiki.chlod.net/jtwc/prog/2021-12-03-0220-io0521prog.txt Alt URL] Three hours later, the system was upgraded to a cyclonic storm, with IMD assigning the system the name Jawad, which was submitted by Saudi Arabia,{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_4fdf76_5.%20Tropical%20Cyclone%20Advisory%20No.1%20based%20on%200600%20UTC%20of%20%2003.12.2021.pdf|title=Tropical Cyclone Advisory No. 1 for Cyclonic Storm Jawad, issued at 09:15 UTC of 03.12.2021 based on 06:00 UTC of 03.12.2021|website=rsmcnewdelhi.imd.gov.in|author=R.K Jenamani|publisher=India Meteorological Department|location=New Delhi, India|date=December 3, 2021|access-date=December 3, 2021|archive-url=https://web.archive.org/web/20211203120012/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_4fdf76_5.%20Tropical%20Cyclone%20Advisory%20No.1%20based%20on%200600%20UTC%20of%20%2003.12.2021.pdf|archive-date=December 3, 2021}} which means "generous" or "merciful" in Arabic.{{cite web|url=https://www.freepressjournal.in/india/cyclone-jawad-how-did-it-get-its-name|title=Cyclone Jawad: How did it get its name?|website=www.freepressjournal.in|publisher=The Free Press Journal|date=December 3, 2021|access-date=December 3, 2021|archive-date=December 3, 2021|archive-url=https://web.archive.org/web/20211203133558/https://www.freepressjournal.in/india/cyclone-jawad-how-did-it-get-its-name|url-status=live}} After 00:00 UTC of December 4, Jawad began weakening after reaching its peak intensity at 12:00 UTC the previous day,{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_05f3f0_11.%20Tropical%20Cyclone%20Advisory%20No.7%20based%20on%200000%20UTC%20of%20%2004.12.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean, issued at 03:00 UTC of 04.12.2021 based on 00:00 UTC of 04.12.2021|website=rsmcnewdelhi.imd.gov.in|author=D.R Pattanaik|publisher=India Meteorological Department|location=New Delhi, India|date=December 4, 2021|access-date=December 25, 2021|archive-date=December 25, 2021|archive-url=https://web.archive.org/web/20211225064034/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_05f3f0_11.%20Tropical%20Cyclone%20Advisory%20No.7%20based%20on%200000%20UTC%20of%20%2004.12.2021.pdf}}{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_a453cf_7.%20Tropical%20Cyclone%20Advisory%20No.3%20based%20on%201200%20UTC%20of%20%2003.12.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean, issued at 15:15 UTC of 03.12.2021 based on 12:00 UTC of 03.12.2021|website=rsmcnewdelhi.imd.gov.in|author=R.K Jenamani|publisher=India Meteorological Department|location=New Delhi, India|date=December 3, 2021|access-date=December 25, 2021|archive-date=December 25, 2021|archive-url=https://web.archive.org/web/20211225063807/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_a453cf_7.%20Tropical%20Cyclone%20Advisory%20No.3%20based%20on%201200%20UTC%20of%20%2003.12.2021.pdf}} and by 12:00 UTC the same day, Jawad lost its organization and the IMD downgraded the storm back into a deep depression, most possibly due to decreasing sea surface temperatures along the storm's track with unfavorable wind shear.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d91bba_15.%20Special%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%20%2004.12.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean, issued at 15:00 UTC of 04.12.2021 based on 12:00 UTC of 04.12.2021|website=rsmcnewdelhi.imd.gov.in|author=Sunitha Devi S|publisher=India Meteorological Department|location=New Delhi, India|date=December 4, 2021|access-date=December 25, 2021|archive-date=December 25, 2021|archive-url=https://web.archive.org/web/20211225070021/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_d91bba_15.%20Special%20Tropical%20Weather%20Outlook%20based%20on%201200%20UTC%20of%20%2004.12.2021.pdf}} This same reasoning was also used by the JTWC in the agency's final warning on the system, three hours earlier.{{cite JTWC|date=December 4, 2021|access-date=December 5, 2021|type=warn|no=6|category=TC|designation=05B|name=Jawad|url=https://www.metoc.navy.mil/jtwc/products/io0521prog.txt|archive-url=https://web.archive.org/web/20211204000000/https://www.metoc.navy.mil/jtwc/products/io0521prog.txt|archive-date=December 4, 2021}} [https://wiki.chlod.net/jtwc/text/2021-12-04-0840-io0521web.txt Alt URL] At the same time by the next day, Jawad was further downgraded into a depression as it started to make a northwestward move,{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_dacd22_20.%20Special%20Tropical%20Weather%20Outlook%20based%20on%200900%20UTC%20of%20%2005.12.2021.pdf|title=Special Tropical Weather Outlook for the North Indian Ocean, issued at 12:00 UTC of 05.12.2021 based on 09:00 UTC of 05.12.2021|website=rsmcnewdelhi.imd.gov.in|author=RK Jenamani|publisher=India Meteorological Department|location=New Delhi, India|date=December 6, 2021|access-date=December 6, 2021|archive-date=December 25, 2021|archive-url=https://web.archive.org/web/20211225070356/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_dacd22_20.%20Special%20Tropical%20Weather%20Outlook%20based%20on%200900%20UTC%20of%20%2005.12.2021.pdf}} and by December 6 at 00:00 UTC, the system further degenerated into a well-marked low-pressure over the northwest Bay of Bengal without making landfall; its convection moved inland over West Bengal and Bangladesh, however.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_084a0c_23.%20Special%20Tropical%20Weather%20Outlook%20based%20on%200000%20UTC%20of%20%2006.12.2021%20(1).pdf|title=Special Tropical Weather Outlook for the North Indian Ocean, issued at 02:30 UTC of 06.12.2021 based on 00:00 UTC of 06.12.2021|website=rsmcnewdelhi.imd.gov.in|author=RK Jenamani|publisher=India Meteorological Department|location=New Delhi, India|date=December 6, 2021|access-date=December 6, 2021|archive-date=December 25, 2021|archive-url=https://web.archive.org/web/20211225070406/https://rsmcnewdelhi.imd.gov.in/uploads/archive/2/2_084a0c_23.%20Special%20Tropical%20Weather%20Outlook%20based%20on%200000%20UTC%20of%20%2006.12.2021%20%281%29.pdf}}

Since Cyclone Jawad stayed mainly over the sea, it didn't cause any significant damages. However it did take two lives because of a falling coconut tree.{{Cite web|author=Nalla Babu|date=December 4, 2021|title=Relief for north coastal Andhra Pradesh as cyclone Jawad weakens into deep depression|url=https://timesofindia.indiatimes.com/city/visakhapatnam/relief-for-north-coastal-andhra-pradesh-as-cyclone-jawad-weakens-into-deep-depression/articleshow/88095838.cms|url-status=live|archive-url=https://web.archive.org/web/20211204170410/https://timesofindia.indiatimes.com/city/visakhapatnam/relief-for-north-coastal-andhra-pradesh-as-cyclone-jawad-weakens-into-deep-depression/articleshow/88095838.cms|archive-date=December 4, 2021|access-date=December 5, 2021|website=The Times of India|language=en|quote=A 17- year-old girl, identified as G Indu, died after a coconut tree uprooted and fell on her due to the strong winds at Meliaputti village Mandal in Srikakulam district on Saturday morning.}}

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Within this basin, a tropical cyclone is assigned a name when it is judged to have reached cyclonic storm intensity with winds of {{cvt|65|km/h}}. The names were selected by a new list from the Regional Specialized Meteorological Center in New Delhi by mid year of 2020. There is no retirement of tropical cyclone names in this basin as the list of names is only scheduled to be used once before a new list of names is drawn up. Should a named tropical cyclone move into the basin from the Western Pacific, then it will retain its original name. The names which were used for the 2021 season are listed below.{{cite web|url=https://rsmcnewdelhi.imd.gov.in/images/pdf/tc-names.pdf|title=Naming of Tropical Cyclones over the North Indian Ocean|website=rsmcnewdelhi.imd.gov.in|author=|publisher=India Meteorological Department|location=New, Delhi|date=|access-date=September 25, 2021|archive-url=https://web.archive.org/web/20210903132359/https://rsmcnewdelhi.imd.gov.in/images/pdf/tc-names.pdf|archive-date=September 3, 2021}}

This is a table of all storms in the 2021 North Indian Ocean cyclone season. It mentions all of the season's storms and their names, duration, peak intensities (according to the IMD storm scale), damage, and death totals. Damage and death totals include the damage and deaths caused when that storm was a precursor wave or extratropical low, and all of the damage figures are in 2021 USD.

{{North Indian Ocean areas affected (Top)}}

|-

| BOB 01 || {{Sort|01|April 2{{snd}}3}} || bgcolor=#{{storm colour|D}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|D}}|{{convert|25|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm colour|D}}| {{convert|1000|hPa|inHg|abbr=on|sigfig=4|comma=off}} || Andaman and Nicobar Islands, Myanmar || {{ntsh|0||$}} None || {{nts|0}} ||

|-

| Tauktae || {{Sort|02|May 14{{snd}}19}} || bgcolor=#{{storm colour|ESCS}}|{{Sort|6|Extremely severe cyclonic storm}} || bgcolor=#{{storm colour|ESCS}}|{{convert|100|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm colour|ESCS}}| {{convert|950|hPa|inHg|abbr=on|sigfig=4|comma=off}} || Delhi, Madhya Pradesh, Maharashtra, Karnataka, Kerala, Goa, Lakshadweep, Maldives, Rajasthan, Uttarakhand, Uttar Pradesh, Sindh, Sri Lanka, West India, Gujarat|| {{ntsp|2250000000||$}} || {{nts|174}} || {{Cite web|title=India - Tropical Cyclone TAUKTAE update (GDACS, IMD, NDM India) (ECHO Daily Flash of May 19, 2021) - India|url=https://reliefweb.int/report/india/india-tropical-cyclone-tauktae-update-gdacs-imd-ndm-india-echo-daily-flash-19-may-2021|access-date=May 19, 2021|website=ReliefWeb|archive-date=May 20, 2021|archive-url=https://web.archive.org/web/20210520091620/https://reliefweb.int/report/india/india-tropical-cyclone-tauktae-update-gdacs-imd-ndm-india-echo-daily-flash-19-may-2021|url-status=live}}{{Cite news|title=Cyclone Tauktae {{!}} Death toll in Gujarat goes up to 53|work=The Hindu|url=https://www.thehindu.com/news/national/other-states/cyclone-tauktae-death-toll-in-gujarat-goes-up-to-53/article34603894.ece|access-date=May 20, 2021|archive-date=May 20, 2021|archive-url=https://web.archive.org/web/20210520081839/https://www.thehindu.com/news/national/other-states/cyclone-tauktae-death-toll-in-gujarat-goes-up-to-53/article34603894.ece|url-status=live}}

|-

| Yaas || {{Sort|03|May 23{{snd}}28}} || bgcolor=#{{storm colour|VSCS}}|{{Sort|5|Very severe cyclonic storm}} || bgcolor=#{{storm colour|VSCS}}|{{convert|75|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm colour|VSCS}}| {{convert|970|hPa|inHg|abbr=on|sigfig=4|comma=off}} || Andaman and Nicobar Islands, Bangladesh, East India, Nepal, Uttar Pradesh|| {{ntsp|2986000000||$}} || {{nts|20}} || {{Cite web|date=May 25, 2021|title=Tornado hits West Bengal districts ahead of Cyclone Yaas landfall, 2 killed, 80 houses damaged|url=https://zeenews.india.com/india/tornado-hits-west-bengal-districts-ahead-of-cyclone-yaas-landfall-2-killed-80-houses-damaged-2364357.html|access-date=May 26, 2021|website=Zee News|language=en|archive-date=May 25, 2021|archive-url=https://web.archive.org/web/20210525183722/https://zeenews.india.com/india/tornado-hits-west-bengal-districts-ahead-of-cyclone-yaas-landfall-2-killed-80-houses-damaged-2364357.html|url-status=live}}{{Cite web|date=May 26, 2021|title=Cyclone Yaas LIVE Updates: Storm batters Bengal-Odisha coast; 4 dead|url=https://indianexpress.com/article/india/cyclone-yaas-live-updates-odisha-west-bengal-rain-weather-7330447/|access-date=May 27, 2021|website=The Indian Express|language=en|archive-date=May 26, 2021|archive-url=https://web.archive.org/web/20210526131137/https://indianexpress.com/article/india/cyclone-yaas-live-updates-odisha-west-bengal-rain-weather-7330447/|url-status=live}}

|-

| BOB 03 || {{Sort|04|September 12{{snd}}15}} || bgcolor=#{{storm colour|DD}}|{{Sort|2|Deep depression}} || bgcolor=#{{storm colour|DD}}|{{convert|30|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm colour|DD}}| {{convert|990|hPa|inHg|abbr=on|sigfig=4|comma=off}} || Central India, Gujarat, Maharashtra, Odisha, West Bengal || {{ntsh|0||$}}Unknown || {{nts|3}} ||

|-

| Gulab || {{Sort|05|September 24{{snd}}28}} || bgcolor=#{{storm colour|CS}}|{{Sort|3|Cyclonic storm}} || bgcolor=#{{storm colour|CS}}|{{convert|45|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm colour|CS}}| {{convert|992|hPa|inHg|sigfig=4|comma=off|abbr=on}} || Andhra Pradesh, Chhattisgarh, Maharashtra, Odisha, Telangana || {{ntsp|271000000||$}} || {{nts|20}} ||

|-

| Shaheen || {{Sort|01|September 30{{snd}}October 4}} || bgcolor=#{{storm colour|SCS}}|{{Sort|4|Severe cyclonic storm}} || bgcolor=#{{storm colour|SCS}}|{{convert|60|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm colour|SCS}}| {{convert|984|hPa|inHg|abbr=on|sigfig=4|comma=off}} || Balochistan, Iran, Gujarat, Oman, Saudi Arabia, Sindh, United Arab Emirates, Yemen || {{ntsp|520000000||$}} || {{nts|14}} ||

|-

| ARB 03 || {{Sort|01|November 7{{snd}}9}} || bgcolor=#{{storm colour|D}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|D}}|{{convert|25|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm colour|D}}| {{convert|1002|hPa|inHg|abbr=on|sigfig=4|comma=off}} || Lakshadweep || {{ntsh|0||$}} None || {{nts|0}} ||

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| BOB 05 || {{Sort|01|November 10{{snd}}12}} || bgcolor=#{{storm colour|D}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|D}}|{{convert|25|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm colour|D}}|{{convert|998|hPa|inHg|sigfig=4|comma=off|abbr=on}} || Andhra Pradesh, Tamil Nadu, Kerala, Sri Lanka || {{ntsh|0||$}} Unknown || {{nts|41}} ||

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| BOB 06 || {{Sort|01|November 18{{snd}}19}} || bgcolor=#{{storm colour|D}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|D}}|{{convert|25|kn|km/h mph|round=5|order=out|sortable=|abbr=on}} || bgcolor=#{{storm colour|D}}| {{convert|1000|hPa|inHg|sigfig=4|comma=off|abbr=on}} || Tamil Nadu || {{ntsh|0||$}} None|| {{nts|0}} ||

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| Jawad || {{Sort|01|December 2{{snd}}6}} || bgcolor=#{{storm colour|CS}}|{{Sort|1|Cyclonic storm}} || bgcolor=#{{storm colour|CS}}|{{convert|40|kn|km/h mph|round=5|order=out|sortable=|abbr=on}} || bgcolor=#{{storm colour|CS}}| {{convert|1000|hPa|inHg|sigfig=4|comma=off|abbr=on}} || Andaman and Nicobar Islands, Andhra Pradesh, Odisha, West Bengal || {{ntsp|50350000||$}} || {{nts|2}} ||

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{{TC Areas affected (Bottom)|TC's=10 systems|dates=April 2{{snd}}December 6|winds={{convert|100|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}}|pres={{convert|950|hPa|inHg|abbr=on|sigfig=4|comma=off}}|damage={{ntsp|6081100000||$}} |deaths={{#expr:174+20+3+20+14+41+2}}|Refs=}}

{{Portal|Tropical cyclones}}

• Weather of 2021
• Tropical cyclones in 2021
• North Indian Ocean cyclone season
• 2021 Atlantic hurricane season
• 2021 Pacific hurricane season
• 2021 Pacific typhoon season
• South-West Indian Ocean cyclone seasons: 2020–21, 2021–22
• Australian region cyclone seasons: 2020–21, 2021–22
• South Pacific cyclone seasons: 2020–21, 2021–22

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{{reflist}}

{{commons category}}

• [http://www.rsmcnewdelhi.imd.gov.in RSMC New Delhi]
• [https://mausam.imd.gov.in/ Indian Meteorological Department]
• [https://www.metoc.navy.mil/jtwc/jtwc.html Joint Typhoon Warning Center (JTWC)]
• [http://www.nmc.cn/publish/typhoon/north-indian-ocean-tropical-cyclone-bulletin.htm National Meteorological Center of CMA] {{in lang|zh}}

{{2021 North Indian Ocean cyclone season buttons}}

{{TC Decades|Year=2020|basin=North Indian Ocean|type=cyclone}}

{{Tropical cyclone season|2020|split-year=yes}}

{{Tropical cyclone season|2021|split-year=yes}}

Category:2021 meteorology

2021 NIO

Category:North Indian Ocean cyclone seasons