2011 North Indian Ocean cyclone season#Deep Depression BOB 04
{{Short description|none}}
{{Use mdy dates|date=April 2012}}
{{Infobox tropical cyclone season
| Basin = NIO
| Year = 2011
| Track = 2011 North Indian Ocean cyclone season summary.png
| First storm formed = February 2, 2011
| Last storm dissipated = December 31, 2011
| Total disturbances = 10
| Total depressions = 6
| Total storms = 2
| Total hurricanes = 1
| Total intense = 1
| Total super =
| Strongest storm name = Thane
| Strongest storm pressure = 969
| Strongest storm winds = 75
| Average wind speed = 3
| Fatalities = 367 total
| Damages = 603
| Season timeline =
| five seasons = 2009, 2010, 2011, 2012, 2013
| Atlantic season = 2011 Atlantic hurricane season
| East Pacific season = 2011 Pacific hurricane season
| West Pacific season = 2011 Pacific typhoon season
}}
The 2011 North Indian Ocean cyclone season was the least active tropical cyclone season in the North Indian Ocean since 1993.{{cite web|title=Yearly and Seasonal Frequency of Cyclones and Depressions|url=http://www.rmcchennaieatlas.tn.nic.in/AnnualFreq_Output.aspx?Param=U2Vhc29uOjE4OTE6MjAxMToxOjI6Mzo6MjozOkJPQitBUytMYW5kOkNTK1NDUw==|publisher=India Meteorological Department|access-date=5 September 2012}}(Note: Creation of an account in the website is required in order to access data.) Only two cyclonic storms formed, below the average of four to six. The North Indian Ocean cyclone season has no official bounds, but cyclones tend to form between April and December, with peaks in May and November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean. The scope of this article is limited to the Indian Ocean in the Northern Hemisphere, east of the Horn of Africa and west of the Malay Peninsula. There are two main seas in the North Indian Ocean — the Arabian Sea to the west of the Indian subcontinent, abbreviated ARB by the India Meteorological Department (IMD); and the Bay of Bengal to the east, abbreviated BOB by the IMD.
This season was the first season since 1993 where only two named storms formed. However, the systems that formed would cause damages of greater than $1.64 million USD and cause approximately 360 fatalities. It is believed that La Niña, a quasiperiodic climate pattern which causes a rise in surface pressure over the Indian Ocean, making the region drier, was the main cause for the below-active activity in the basin.{{cite web|title=Australia says signs El Niño weather pattern forming|url=https://www.reuters.com/article/us-weather-elnino-australia-idUSBRE87D12620120814|work=Reuters|access-date=8 September 2012|author=Colin Packham}}
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Season summary
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id:TD value:rgb(0,0.52,0.84) legend:Depression_(31–50_km/h)
id:DD value:rgb(0.43,0.76,0.92) legend:Deep_Depression_(51–62_km/h)
id:TS value:rgb(0.3,1,1) legend:Cyclonic_Storm_(63–88_km/h)
id:ST value:rgb(0.75,1,0.75) legend:Severe_Cyclonic_Storm_(89–117_km/h)
id:VS value:rgb(1,0.85,0.55) legend:Very_Severe_Cyclonic_Storm_(118–165_km/h)
id:ES value:rgb(1,0.45,0.54) legend:Extremely_Severe_Cyclonic_Storm_(166–220_km/h)
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PlotData=
barset:Hurricane width:10 align:left fontsize:S shift:(4,-4) anchor:till
from:02/02/2011 till:03/02/2011 color:TD text:BOB 01 (D)
from:11/06/2011 till:12/06/2011 color:TD text:ARB 01 (D)
from:16/06/2011 till:23/06/2011 color:TD text:BOB 02 (DD)
from:22/07/2011 till:23/07/2011 color:TD text:LAND 01 (D)
from:22/09/2011 till:23/09/2011 color:TD text:BOB 03 (D)
from:19/10/2011 till:20/10/2011 color:TD text:BOB 04 (DD)
from:29/10/2011 till:04/11/2011 color:TS text:Keila (CS)
from:06/11/2011 till:10/11/2011 color:TD text:ARB 03 (DD)
barset:break
from:26/11/2011 till:01/12/2011 color:TD text:ARB 04 (DD)
from:25/12/2011 till:31/12/2011 color:VS text:Thane (VS)
bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas
from:01/02/2011 till:01/03/2011 text:February
from:01/03/2011 till:01/04/2011 text:March
from:01/04/2011 till:01/05/2011 text:April
from:01/05/2011 till:31/05/2011 text:May
from:01/06/2011 till:01/07/2011 text:June
from:01/07/2011 till:01/08/2011 text:July
from:01/08/2011 till:01/09/2011 text:August
from:01/09/2011 till:01/10/2011 text:September
from:01/10/2011 till:01/11/2011 text:October
from:01/11/2011 till:01/12/2011 text:November
from:01/12/2011 till:01/01/2012 text:December
from:01/01/2012 till:01/02/2012 text:January
This season, 9 depressions developed from low-pressure areas, with six intensifying into deep depressions. Out of the deep depressions, two would develop into cyclonic storms. One of the cyclonic storms would later intensify into a severe cyclonic storm.
The first depression of the season developed on February 2 about {{convert|300|km|mi|abbr=on}} to the east of Colombo, Sri Lanka. The depression brought isolated rainfall to parts of Sri Lanka, while remaining near stationary before weakening into an area of low pressure early the next day.
Depression ARB 01 formed in early June near India, before Deep Depression BOB 02 formed a few days later. Land Depression 01 formed on July 22, and dissipated a day later. Depression BOB 03 formed on September 22, and soon made landfall on India. Depression BOB 03 dissipated the next day, on September 23. October was a much more active month, as Deep Depression BOB 04 and Deep Depression ARB 02 both formed, during this period of time. Then Cyclonic Storm Keila formed in November and came ashore in Oman, before Depression ARB03 formed and dissipated near the Oman coast.
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Systems
=Depression BOB 01=
{{Infobox tropical cyclone small
| Basin = NIO
| Image = BOB 01 - 2 feb.jpg
| Track = BOB01 2011 track.png
| Formed = February 2
| Dissipated = February 3
| 3-min winds = 25
| Pressure = 1002
}}
On February 2, the IMD upgraded an area of low pressure, located approximately 100 km southeast of Pottuvil, Sri Lanka, to a depression, giving it the designation "BOB 01."{{cite web|title=IMD Cyclonic Bulletin 01 For Depression BOB 01 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=February 2, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} The convection in the system gradually increased and the system drifted towards land.{{cite web|title=Tropical Weather Outlook — February 2, 1400z |url=http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |publisher=India Meteorological Department |access-date=February 3, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20120106212829/http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |archive-date=January 6, 2012 |df=mdy }} Early on the next day, the IMD downgraded the system into a remnant low because of its proximity to land and weakened.{{cite web|title=IMD Cyclonic Bulletin 04 for Depression BOB 01 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=February 3, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }}
Following catastrophic floods in December 2010 and January 2011, the depression brought additional rainfall to Sri Lanka.{{cite web|author=Staff Writer|publisher=Colombo Page|date=February 4, 2011|access-date=February 4, 2011|title=Six dead, over 250,000 affected in Sri Lanka floods|url=http://www.colombopage.com/archive_11/Feb04_1296836952JR.php|archive-url=https://web.archive.org/web/20110207045949/http://www.colombopage.com/archive_11/Feb04_1296836952JR.php|archive-date=February 7, 2011|url-status=dead}} The subsequent floods and mudslides killed 18 people and affected nearly 1.2 million. Numerous roads were washed away as reservoirs across the island overflowed their banks and inundated surrounding communities. In the wake of the floods, the Government of Sri Lanka allocated 33 billion Sri Lankan rupee ($287 million US$) for rehabilitation.{{cite web|work=UN Office for the Coordination of Humanitarian Affairs|publisher=ReliefWeb|date=February 11, 2011|access-date=November 11, 2011|title=Sri Lanka: Monsoon Flood Update Situation Report 13 |url=http://reliefweb.int/sites/reliefweb.int/files/resources/74102ABFE9DAC5BAC12578360031639B-Full_Report.pdf}}
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=Depression ARB 01=
{{Infobox tropical cyclone small
| Basin = NIO
| Image = ARB 01 11 June 2011 MODIS.jpg
| Track = ARB01 2011 track.png
| Formed = June 11
| Dissipated = June 12
| 1-min winds = 35
| 3-min winds = 25
| Pressure = 996
}}
In early June, a low-pressure area formed over the Arabian Sea. The low-pressure area remained stationary and became more well marked. On June 11, the IMD upgraded the area of low pressure to a depression giving it the designation "ARB 01".{{cite web|title=IMD Cyclone Bulletin 01 For Depression ARB 01 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=June 11, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} The same day, the JTWC designated the system as Tropical Cyclone 01A.{{cite web|title=Tropical Cyclone 01A Warning 01 by JTWC |url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0111web.txt |publisher=Joint Typhoon Warning Center |access-date=June 11, 2011 |url-status=dead |archive-url=https://archive.today/20240522105745/https://www.webcitation.org/5zMiTMewY?url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0111web.txt |archive-date=May 22, 2024 |df=mdy }} At that time it was located approximately {{convert|180|km|mi}} northwest of Mumbai, India and {{convert|150|km|mi}} southeast of Veraval, Gujarat. Later, on June 12, IMD reported that the depression had crossed the Saurashtra coast of India about 25 km east of Diu.{{cite web|title=IMD Cyclone Bulletin 04 For Depression ARB 01 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=June 12, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} Later on the same day, the IMD reported that the depression had weakened into a well-marked low-pressure area in their last bulletin for the system.{{cite web|title=IMD Cyclone Bulletin 06 For Depression ARB 01 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=June 12, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }}
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=Deep Depression BOB 02=
{{Infobox tropical cyclone small
| Basin = NIO
| Image = Deep Depressin BOB 02 16 June 2011.jpg
| Track = BOB02 2011 track.png
| Type = deepdepression
| Formed = June 16
| Dissipated = June 23
| 3-min winds = 35
| Pressure = 978
}}
On June 16, the IMD upgraded a well marked low-pressure area (WML), located about 100 km east-southeast of Sagar Island, 150 km southeast of Kolkata and 150 km west-southwest of Khepupara (Bangladesh), to a depression, giving it the designation "BOB 02".{{cite web|title=IMD Cyclonic Bulletin 01 For Depression BOB 02 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=June 16, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} On June 16, the depression intensified into a deep depression and crossed the West Bengal coast about 100 km east of Sagar Island.{{cite web|title=IMD Cyclonic Bulletin 03 For Depression BOB 02 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=June 16, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} On the same day, at 1900 hrs UTC, the JTWC issued a Tropical Cyclone Formation Alert (TCFA).{{cite web|title=JTWC TCFA issued for BOB 02 |url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io9911web.txt |publisher=Joint Typhoon Warning Center |access-date=June 17, 2011 |url-status=dead |archive-url=https://archive.today/20240522105823/https://www.webcitation.org/5zVzpv4SP?url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io9911web.txt |archive-date=May 22, 2024 |df=mdy }} The system drifted further inland and the JTWC cancelled their TCFA the next day.{{cite web|title=JTWC TCFA cancellation for BOB 02 |url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io9911web.txt |publisher=Joint Typhoon Warning Center |access-date=June 17, 2011 |url-status=dead |archive-url=https://archive.today/20240522105823/https://www.webcitation.org/5zVzpv4SP?url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io9911web.txt |archive-date=May 22, 2024 |df=mdy }} The system weakened into a depression by June 18 and laid centered over Jharkhand.{{cite web|title=IMD Cyclonic Bulletin 15 For Deep Depression BOB 02 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=June 18, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} The depression gradually drifted westwards and moved onto northern Madhya Pradesh by June 21.{{cite web|title=IMD Cyclonic Bulletin 21 For Deep Depression BOB 02 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=June 21, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} and slowly dissipated into a well marked low-pressure area on June 23.{{cite web|title=IMD Cyclonic Bulletin 30 For Deep Depression BOB 02 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=June 21, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }}
Heavy rains across West Bengal triggered widespread flooding and landslides that killed at least six people.{{cite news|author=Raktima Bose|work=The Hindu |date=June 17, 2011|access-date=November 11, 2011|title=Heavy rain claims 6 lives in West Bengal |url=http://www.thehindu.com/news/states/other-states/article2112464.ece|location=Chennai, India}}
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=Land Depression 01=
{{Infobox tropical cyclone small
| Basin = NIO
| Image = LAND 01 Jul 22 2011 0735Z.jpg
| Track = 2011 NIO Land depression 01 track.png
| Formed = July 22
| Dissipated = July 23
| 3-min winds = 20
| Pressure = 990
}}
On July 21 as the Madden–Julian oscillation entered its fifth phase, the Bay of Bengal became favourable for tropical cyclogenesis. As a result of this and an upper tropospheric cyclonic vortex, an area of low pressure developed on July 21, over the Gangetic West Bengal about {{convert|50|km|mi|round=5|abbr=on}} to the southeast of Daltonganj. During the next day the IMD reported that the low-pressure area had intensified into a land depression, with peak 3-minute sustained windspeeds of {{convert|35|km/h|mph|abbr=on|round=5}}. During that day, the depression moved towards the northwest under the influence of a monsoon trough before it weakened into a low-pressure area during July 23.{{cite web|url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-url=https://archive.today/20240522105901/https://www.webcitation.org/60RPvqtPO?url=http://gwydir.demon.co.uk/advisories/IMD%20Cyclone%20Warning%20(CWIND)_201107230600.htm |title=Cyclone Warning For Indian Coast, Land Depression 01, Warning 4 |author=Regional Specialised Meteorological Center New Delhi, India |date=July 23, 2011 |publisher=India Meteorological Department |access-date=April 9, 2012 |archive-date=May 22, 2024 |url-status=dead |df=mdy }} Under the influence of the system, the Indian states of Madhya Pradesh, Rajasthan, Gujarat, Chhattisgarh and Vidarbha saw widespread heavy rainfall, however, no economic damage was reported.{{cite report|title=Land Depression 01|type=Preliminary report|publisher=India Meteorological Department|url=http://www.imd.gov.in/section/nhac/dynamic/22-23July.docx|access-date=October 3, 2011|author=Regional Specialised Meteorological Center New Delhi, India|archive-url=https://web.archive.org/web/20120330124718/http://www.imd.gov.in/section/nhac/dynamic/22-23July.docx|archive-date=March 30, 2012|url-status=dead|df=mdy-all}}
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=Depression BOB 03=
{{Infobox tropical cyclone small
| Basin = NIO
| Image = Depression BOB 03 September 22 2011.jpg
| Track = BOB03 2011 track.png
| Formed = September 22
| Dissipated = September 23
| 3-min winds = 25
| Pressure = 995
}}
Late on September 20, an area of low pressure developed approximately {{convert|200|nmi}} south of Chittagong, Bangladesh.{{cite web|title=JTWC — Tropical Cyclone Warning 201800 – Depression BOB 03 |url=http://gwydir.demon.co.uk/advisories/ABIO10-PGTW_201109201800.htm |publisher=Joint Typhoon Warning Center |access-date=September 22, 2011 |url-status=dead |archive-url=https://archive.today/20240522105941/https://www.webcitation.org/61t22GjWr?url=http://gwydir.demon.co.uk/advisories/ABIO10-PGTW_201109201800.htm |archive-date=May 22, 2024 |df=mdy }} Under the influence of strong vertical wind shear and monsoonal activity in the Bay of Bengal, the system was unable to strengthen and the JTWC later reported that the system had dissipated.{{cite web|title=JTWC — Tropical Cyclone Warning 211800 – Depression BOB 03 |url=http://gwydir.demon.co.uk/advisories/ABIO10-PGTW_201109211800.htm |publisher=Joint Typhoon Warning Center |access-date=September 22, 2011 |url-status=dead |archive-url=https://archive.today/20240522110022/https://www.webcitation.org/61t2FsTxI?url=http://gwydir.demon.co.uk/advisories/ABIO10-PGTW_201109211800.htm |archive-date=May 22, 2024 |df=mdy }} However, on September 22, the IMD started monitoring the system as a Depression and initiated bulletins on the system, designating it BOB 03.{{cite web|title=IMD — Tropical Cyclone Bulletin 01 – Depression BOB 03 |url=http://gwydir.demon.co.uk/advisories/IMD%20Cyclone%20Warning%20(CWIND)_201109220700.htm |publisher=India Meteorological Department |access-date=September 22, 2011 |url-status=dead |archive-url=https://archive.today/20240522110103/https://www.webcitation.org/61t2ViAAV?url=http://gwydir.demon.co.uk/advisories/IMD%20Cyclone%20Warning%20(CWIND)_201109220700.htm |archive-date=May 22, 2024 |df=mdy }} Late on that day, BOB 03 drifted northwest and made landfall over north Orissa close to Balasore.{{cite web|title=IMD — Tropical Cyclone Bulletin 04 – Depression BOB 03 |url=http://gwydir.demon.co.uk/advisories/IMD%20Cyclone%20Warning%20(CWIND)_201109222100.htm |publisher=India Meteorological Department |access-date=September 23, 2011 |url-status=dead |archive-url=https://archive.today/20240522110146/https://www.webcitation.org/61uBWj4Tn?url=http://gwydir.demon.co.uk/advisories/IMD%20Cyclone%20Warning%20(CWIND)_201109222100.htm |archive-date=May 22, 2024 |df=mdy }} After moving further northwestwards, the depression remained practically stationary over Jharkhand. By the evening of September 23, IMD reported that the depression had weakened into a well-marked low-pressure area in their final bulletin for the system, as the storm dissipated to a remnant low.{{cite web|title=IMD — Tropical Cyclone Bulletin 08 – Depression BOB 03 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=India Meteorological Department |access-date=September 23, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }}
As the depression made landfall, heavy rains threatened to cause floods for the second time within two weeks in the Bramhani and Baitarani rivers. By the evening of September 22, 90 villages in Jajpur were displaced due to the sudden swelling of the Baitarani River.{{cite news|title=Fresh flood fear looms in 5 Orissa districts|url=http://timesofindia.indiatimes.com/city/bhubaneswar/Fresh-flood-fear-looms-in-5-Orissa-districts/articleshow/10088587.cms|work=The Times of India |access-date=September 23, 2011|date=September 23, 2011}} At least 38 people were killed in flood-related incidents across Orissa. The worst flooding took place in the districts of Jajpur and Bhadrak where at least 18 people perished.{{cite web|publisher=Outlook India|date=September 28, 2011|access-date=November 11, 2011|title=Orissa Flood Toll Mounts to 38, Relief Operation Begins|url=http://news.outlookindia.com/items.aspx?artid=736543|archive-url=https://web.archive.org/web/20120614061349/http://news.outlookindia.com/items.aspx?artid=736543|archive-date=June 14, 2012|url-status=dead|df=mdy-all}}
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=Deep Depression BOB 04=
{{Infobox tropical cyclone small
| Basin = NIO
| Image = Deep Depression BOB04 Oct 19 2011.jpg
| Track = BOB04 2011 track.png
| Formed = October 19
| Dissipated = October 20
| 3-min winds = 30
| 1-min winds = 40
| Pressure = 996
}}
A low-pressure area over the Bay of Bengal intensified, and was upgraded to Depression BOB 04 on October 19, 2011.{{cite web|title=IMD Cyclone Warning 1 for BOB 04 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |work=IMD |publisher=IMD |access-date=October 19, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 }} The depression intensified slightly and the IMD upgraded the storm into a Deep Depression the same day.{{cite web|title=IMD Bulletin 3 for BOB 04 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |work=IMD |access-date=October 19, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 }} Later on the same day, the JTWC upgraded the system into a Tropical Storm. The system moved inland and weakened into a depression. The weakening process took place gradually as the storm moved more inland and dissipated into a remnant low.{{cite web|last=IMD |title=IMD Final Bulletin for Deep Depression BOB 04 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=IMD |access-date=October 20, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }}
Along the border between Myanmar and Bangladesh, torrential rains produced devastating flash floods. In the Magway region, roughly 2,000 homes were washed away by a "mass of water" and more than 6,000 remained flooded for days. Initial estimates placed damage from the storm at $1.64 million.{{cite news|agency=Agence France-Presse|publisher=Australian Broadcasting Corporation|date=October 24, 2011|access-date=November 11, 2011|title=More than 100 dead in Burma floods|url=http://www.abc.net.au/news/2011-10-24/scores-dead-in-burma-floods/3596416}} At least 215 people were confirmed to have been killed with many more missing. Officials in the hard-hit town of Pakokku believed that the death toll would exceed 300 as residents searched for missing relatives days after the floods.{{cite web|author=Than Win Htut|publisher=Democratic Voice of Burma|date=October 24, 2011|access-date=November 11, 2011|title=Burma flooding deaths top 200|url=http://www.dvb.no/news/burma-flooding-deaths-top-200/18344|archive-url=https://web.archive.org/web/20111229070738/http://www.dvb.no/news/burma-flooding-deaths-top-200/18344|archive-date=December 29, 2011|url-status=dead}} Similar to what took place in the wake of Cyclone Nargis in 2008, journalists were warned by the Government not to take pictures of the disaster. Overall, it is the deadliest tropical cyclone in the North Indian Ocean since Cyclone Aila in 2009.{{cite web|author=Naw Noreen|publisher=Democratic Voice of Burma|date=October 25, 2011|access-date=November 11, 2011|title=Thousands of flood victims lacking aid|url=http://www.dvb.no/news/thousands-of-flood-victims-lacking-aid/18383|archive-url=https://web.archive.org/web/20111030105119/http://www.dvb.no/news/thousands-of-flood-victims-lacking-aid/18383|archive-date=October 30, 2011|url-status=dead}}
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=Cyclonic Storm Keila=
{{main|Cyclone Keila}}
{{Infobox tropical cyclone small
| Basin = NIO
| Image = Keila Nov 2 2011 0920Z.jpg
| Track = Keila 2011 track.png
| Formed = October 29
| Dissipated = November 4
| 3-min winds = 35
| 1-min winds = 55
| Pressure = 996
}}
Under the influence of a low-level trough, a low-pressure area formed over the Arabian Sea in late October. The system organized and the IMD designated the system Depression "ARB 02".{{cite web|last=IMD |title=IMD Bulletin 1 for ARB 02 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |publisher=IMD |access-date=October 29, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} The depression moved toward the Middle East during the next few days and intensified into a Deep Depression on November 1.{{cite web|last=IMD |title=IMD Bulletin for Deep Depression ARB 02 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |work=IMD |publisher=IMD |access-date=November 1, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} In the morning of November 2, IMD upgraded the deep depression into a cyclonic storm and assigned it the name Keila.
Heavy rains from the storm in Oman were blamed on at least 14 deaths and 200 people are injured. High flood waters prompted the evacuation of hospitals in the capital city of Muscat.{{cite web|work=Al Arabia|date=November 3, 2011|access-date=November 3, 2011|title=14 killed and 200 injured as tropical storm sweeps across Oman|url=http://english.alarabiya.net/articles/2011/11/03/175291.html|archive-url=https://web.archive.org/web/20111104001549/http://english.alarabiya.net/articles/2011/11/03/175291.html|archive-date=November 4, 2011|url-status=dead|df=mdy-all}} On November 3, JTWC downgraded the storm into a tropical depression. On the same day, JTWC issued their final advisories on this system. In the evening, IMD downgraded the storm into a deep depression. On November 4, IMD downgraded the depression into an area of low pressure, issuing its final advisory on the system.{{cite web|last=IMD |title=IMD Final Warning for Keila |url=http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |work=IMD |publisher=IMD |access-date=November 4, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20120106212829/http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |archive-date=January 6, 2012 |df=mdy }}
{{clear}}
=Deep Depression ARB 03=
{{Infobox tropical cyclone small
| Basin = NIO
| Image = ARB 03 Nov 7 2011 0635Z.jpg
| Track = ARB03 2011 track.png
| Formed = November 6
| Dissipated = November 10
| 3-min winds = 30
| 1-min winds = 35
| Pressure = 1000
}}
On November 6, the IMD upgraded a low-pressure area into a Depression, designating it ARB 03. The system was forecasted to intensify into a deep depression and move towards the Gulf of Aden in the next 72 hours.{{cite web|last=IMD |title=IMD Bulletin 1 for ARB 03 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |work=IMD |publisher=IMD |access-date=November 6, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} On the same day a TCFA was issued by the JTWC.{{cite web|last=JTWC |title=JTWC TCFA For ARB 03 |url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io9611web.txt |work=JTWC |access-date=November 7, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20120118151400/http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io9611web.txt |archive-date=January 18, 2012 |df=mdy }} The IMD upgraded the storm into a deep depression on November 8, and forecasted that it would intensify into a cyclonic storm within the next 24 hours{{cite web|last=IMD |title=IMD Deep Depression ARB 03 Warning 5 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |work=IMD |publisher=IMD |access-date=November 8, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} which was followed by an upgrade to a tropical storm by JTWC.{{cite web|last=JTWC |title=JTWC Tropical Cyclone 04A Warning 4 |url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0411web.txt |work=JTWC |publisher=JTWC |access-date=November 8, 2011 |url-status=dead |archive-url=https://archive.today/20240522110223/https://www.webcitation.org/634IB8pEx?url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0411web.txt |archive-date=May 22, 2024 |df=mdy }} Under the influence of unfavorable conditions and proximity to land, the system weakened and JTWC issued its final warning.{{cite web|last=JTWC |title=JTWC Final Warning for Deep Depression ARB 03 |url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0411web.txt |work=JTWC |publisher=JTWC |access-date=November 9, 2011 |url-status=dead |archive-url=https://archive.today/20240522110223/https://www.webcitation.org/634IB8pEx?url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0411web.txt |archive-date=May 22, 2024 |df=mdy }} Soon the IMD downgraded the storm into a depression.{{cite web|last=IMD |title=IMD RSMC Bulletin for 9 November 2011 |url=http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |work=IMD |publisher=IMD |access-date=November 9, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20120106212829/http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |archive-date=January 6, 2012 |df=mdy }} On November 10, the storm dissipated into a low-pressure area.{{cite web|last=IMD |title=IMD Final Bulletin for ARB 03 |url=http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |work=IMD |publisher=IMD |access-date=November 10, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20120106212829/http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |archive-date=January 6, 2012 |df=mdy }}
{{clear}}
=Deep Depression ARB 04=
{{Infobox tropical cyclone small
| Basin = NIO
| Image = Deep Depression ARB 04 on 29 Nov near Peak Intensity.png
| Track = ARB04 2011 track.png
| Formed = November 26
| Dissipated = December 1
| 3-min winds = 30
| 1-min winds = 35
| Pressure = 998
}}
On November 26, at 11:30 am IST, the IMD upgraded a low-pressure area south of India near Cape Comorin into a depression, giving it the designation ARB 04.{{cite web|last=IMD |title=IMD Warning Bulletin 1 for ARB 04 |url=http://gwydir.demon.co.uk/advisories/IMD%20Cyclone%20Warning%20(CWIND)_201111260600.htm |work=IMD |publisher=IMD |access-date=November 26, 2011 |url-status=dead |archive-url=https://archive.today/20240522110345/https://www.webcitation.org/63TmZXFt9?url=http://gwydir.demon.co.uk/advisories/IMD%20Cyclone%20Warning%20(CWIND)_201111260600.htm |archive-date=May 22, 2024 |df=mdy }} The same day, the JTWC upgraded the storm from a tropical depression to a Tropical Storm and named it 05A.{{cite web|last=JTWC |title=JTWC Tropical Storm Warning 2 for 05A |url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201111260900.htm |work=JTWC |publisher=JTWC |access-date=November 26, 2011 |url-status=dead |archive-url=https://archive.today/20240522110303/https://www.webcitation.org/63TmFj4Yw?url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201111260900.htm |archive-date=May 22, 2024 |df=mdy }} Extensive damage and loss of life was reported in Sri Lanka, where the storm was linked with heavy rains which caused 19 deaths and damage to 5,700 homes.{{cite news|last=AFP |title=Sri Lanka storm kills 19, damages 5,700 homes |url=https://www.google.com/hostednews/afp/article/ALeqM5gTZ0ISrN3pzhognqLPXYGYupMRjw?docId=CNG.3897a3194b0d48ccca8b58b0c2a9d105.591 |access-date=November 27, 2011 |agency=AFP |date=November 27, 2011 |url-status=dead |archive-url=https://archive.today/20240522110425/https://www.webcitation.org/63Vnhm01u?url=http://www.google.com/hostednews/afp/article/ALeqM5gTZ0ISrN3pzhognqLPXYGYupMRjw%3FdocId=CNG.3897a3194b0d48ccca8b58b0c2a9d105.591 |archive-date=May 22, 2024 |df=mdy }} The IMD upgraded the storm to a Deep Depression on November 28.{{cite web|last=IMD |title=IMD Upgradation to Deep depression |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |work=IMD |publisher=IMD |access-date=November 28, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} Later on November 29 the IMD downgraded the storm into a depression.{{cite web|last=IMD |title=IMD ARB 04 Bulletin 19 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |work=IMD |publisher=IMD |access-date=November 29, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }} Following the downgrading of the storm by IMD, the JTWC on November 30 issued their final warning on 05A. The IMD reported on December 1 that the storm had weakened into a well-marked low-pressure area, and issued the final bulletin for the system.{{cite web|last=IMD |title=IMD Final Warning for ARB 04 |url=http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |work=IMD |publisher=IMD |access-date=December 1, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |archive-date=December 22, 2011 |df=mdy }}
{{clear}}
{{Use mdy dates|date=August 2012}}
{{Use mdy dates|date=August 2012}}
{{Use mdy dates|date=August 2012}}
=Very Severe Cyclonic Storm Thane=
{{main|Cyclone Thane}}
{{Infobox tropical cyclone small
| Basin = NIO
| Track = Thane 2011 track.png
| Image = Thane 2011 Dec 29 0735Z.jpg
| Formed = December 25
| Dissipated = December 31
| 3-min winds = 75
| 1-min winds = 90
| Pressure = 969
}}
On December 23, the JTWC reported that a tropical disturbance had developed within the monsoon trough about {{convert|960|mi|km|order=flip|round=5|abbr=on}} to the east of Medan in Indonesia.{{cite web|author=Joint Typhoon Warning Center|url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/ab/abioweb.txt|archive-url=https://web.archive.org/web/20120101121351/http://weather.noaa.gov/pub/data/raw/ab/abio10.pgtw..txt|title=Significant Tropical Weather Advisory for the Indian Ocean 2011-12-23 03z|archive-date=January 1, 2012|url-status=dead|publisher=United States Navy, United States Air Force|access-date=December 28, 2011}}{{cite web|title=Significant Tropical Weather Advisory for the Indian Ocean 2011-12-24 03z|url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/ab/abioweb.txt|archive-url=https://archive.today/20240522062455/https://www.webcitation.org/64AckF6J2?url=http://gwydir.demon.co.uk/advisories/ABIO10-PGTW_201112240300.htm|access-date=December 28, 2011|author=Joint Typhoon Warning Center|publisher=United States Navy, United States Air Force|url-status=dead|archive-date=May 22, 2024}} Convection surrounding the system had started to consolidate over a weak low level circulation centre, that was being fed by an enhanced westerly flow associated with the precursor system to Tropical Cyclone Benilde. Over the next couple of days the disturbance gradually developed further while moving towards the northwest, before the JTWC issued a TCFA on the system during December 25 before designating as Tropical Cyclone 06B later that day.{{cite web|publisher=United States Navy, United States Air Force |archive-url=https://web.archive.org/web/20111021124226/http://weather.noaa.gov/pub/data/raw/wt/wtio21.pgtw..txt |url=http://weather.noaa.gov/pub/data/raw/wt/wtio21.pgtw..txt |archive-date=October 21, 2011 |title=Tropical Cyclone Formation Alert 2011-12-25 11z |date=December 25, 2011 |author=Joint Typhoon Warning Center |access-date=December 30, 2011 |url-status=live |df=mdy }}{{cite web|url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201112252100.htm |title=JTWC Tropical Cyclone 06B (Thane) Warning December 25, 2011 21z |publisher=United States Navy, United States Air Force |date=December 25, 2011 |author=Joint Typhoon Warning Center |access-date=December 30, 2011 |url-status=dead |archive-url=https://archive.today/20240522062534/https://www.webcitation.org/64DVzNKSO?url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201112252100.htm |archive-date=May 22, 2024 |df=mdy }} The IMD also reported during December 25, that the disturbance had organised sufficiently to be declared Depression BOB 05, while it was located about {{convert|1000|km|mi|round=5|abbr=on}} to the southeast of Chennai, India.{{cite web|author=Unattributed |title=Special Tropical Weather Outlook for the North Indian Ocean 2011-12-25 15z |work=Regional Specialised Meteorological Center New Delhi, India |publisher=India Meteorological Department |access-date=December 29, 2011 |url=http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |date=December 25, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20120106212829/http://www.imd.gov.in/section/nhac/dynamic/rsmc.htm |archive-date=January 6, 2012 |df=mdy }} During the next day, the IMD reported that the depression had intensified into a Deep Depression, before later that day reporting that it had intensified into Cyclonic Storm Thane.{{cite web|author=Unattributed |title=Special Tropical Weather Outlook for the North Indian Ocean 2011-12-26 03z |work=Regional Specialised Meteorological Center New Delhi, India |publisher=India Meteorological Department |access-date=December 29, 2011 |url=http://gwydir.demon.co.uk/advisories/IMD%20Advisory-Outlook%20(RSMC)_201112260400.htm |date=December 26, 2011 |url-status=dead |archive-url=https://archive.today/20240522062615/https://www.webcitation.org/64DWbWxTO?url=http://gwydir.demon.co.uk/advisories/IMD%20Advisory-Outlook%20(RSMC)_201112260400.htm |archive-date=May 22, 2024 |df=mdy }}{{cite web|title=Special Tropical Weather Outlook for the North Indian Ocean 2011-12-26 21z |publisher=India Meteorological Department |access-date=December 29, 2011 |url=http://gwydir.demon.co.uk/advisories/IMD%20Advisory-Outlook%20(RSMC)_201112262100.htm |work=Regional Specialised Meteorological Center New Delhi, India |date=December 26, 2011 |url-status=dead |archive-url=https://archive.today/20240522062656/https://www.webcitation.org/64F30IlgZ?url=http://gwydir.demon.co.uk/advisories/IMD%20Advisory-Outlook%20(RSMC)_201112262100.htm |archive-date=May 22, 2024 |df=mdy }} As it was named, Thane started to turn towards the west under the influence of a subtropical ridge of high pressure before its development slowed as strong outflow and marginally favourable sea surface temperatures fought with persistent easterly vertical wind shear.{{cite web|url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201112262100.htm |title=JTWC Tropical Cyclone 06B (Thane) Warning 2011-12-27 03z |date=December 27, 2011 |access-date=December 30, 2011 |work=Joint Typhoon Warning Center |publisher=United States Navy, United States Air Force |url-status=dead |archive-url=https://archive.today/20240522062733/https://www.webcitation.org/64F3R0gIx?url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201112262100.htm |archive-date=May 22, 2024 |df=mdy }}{{cite web|url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201112280300.htm |author=Joint Typhoon Warning Center |publisher=United States Navy, United States Air Force |title=JTWC Tropical Cyclone 06B (Thane) Warning 2011-12-28 03z |date=December 28, 2011 |access-date=December 30, 2011 |url-status=dead |archive-url=https://archive.today/20240522062937/https://www.webcitation.org/64GUI85G8?url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201112280300.htm |archive-date=May 22, 2024 |df=mdy }}
Early on December 28, the JTWC reported that Thane had become the equivalent to a category one hurricane on the SSHS before later that day the IMD reported that Thane had become the first Very Severe Cyclonic Storm of the season.{{cite web|title=JTWC Tropical Cyclone 06B (Thane) Warning 2011-12-27 09z |url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0611web.txt |access-date=December 29, 2011 |date=December 28, 2011 |author=Joint Typhoon Warning Center |publisher=United States Navy, United States Air Force |url-status=dead |archive-url=https://archive.today/20240522062817/https://www.webcitation.org/64GlU1qpN?url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0611web.txt |archive-date=May 22, 2024 |df=mdy }}{{cite web|title=IMD Tropical Cyclone Thane Advisory Number:15 December 28, 2011 1500z |author=Regional Specialised Meteorological Center New Delhi, India |publisher=India Meteorological Department |access-date=December 29, 2011 |url=http://gwydir.demon.co.uk/advisories/IMD%20Advisory-Outlook%20(RSMC)_201112281500.htm |date=December 28, 2011 |url-status=dead |archive-url=https://archive.today/20240522062857/https://www.webcitation.org/64GsbOn1J?url=http://gwydir.demon.co.uk/advisories/IMD%20Advisory-Outlook%20(RSMC)_201112281500.htm |archive-date=May 22, 2024 |df=mdy }} During December 28, Thane continued to intensify, and developed a small pinhole eye, before the JTWC reported that Thane had attained its peak intensity early on December 29 with 1-minute sustained wind speeds of {{convert|165|km/h|mph|abbr=on|round=5}}.{{cite web|title=Tropical Cyclone 06B (Thane) Warning 2011-12-28 09z |publisher=United States Navy, United States Air Force |archive-date=May 22, 2024 |url=http://weather.noaa.gov/pub/data/raw/wt/wtio31.pgtw..txt |archive-url=https://archive.today/20240522063056/https://www.webcitation.org/64I0HaMTf?url=http://gwydir.demon.co.uk/advisories/WTIO31-PGTW_201112290900.htm |access-date=December 29, 2011 |author=Joint Typhoon Warning Center |url-status=dead |df=mdy }}{{cite web|url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/best_tracks/2011/2011s-bio/bio062011.dat|archive-url=https://web.archive.org/web/20120608224715/http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/best_tracks/2011/2011s-bio/bio062011.dat|url-status=dead|archive-date=June 8, 2012|title=Tropical Cyclone 06B (Thane) Best Track Analysis|publisher=United States Navy, United States Air Force|author=Joint Typhoon Warning Center|date=May 5, 2012|access-date=May 5, 2012}} The IMD then followed suit and reported that the system had peaked as a Very Severe Cyclonic Storm with 3-minute sustained windspeeds of {{convert|140|km/h|mph|abbr=on|round=5}}.{{cite web|author=Regional Specialised Meteorological Center New Delhi, India |access-date=December 29, 2011 |url=http://gwydir.demon.co.uk/advisories/IMD%20Advisory-Outlook%20(RSMC)_201112290700.htm |publisher=India Meteorological Department |date=December 29, 2011 |title=IMD Tropical Cyclone Thane Advisory Number:20 2011-12-29 06z |url-status=dead |archive-url=https://archive.today/20240522063018/https://www.webcitation.org/64I00W2zR?url=http://gwydir.demon.co.uk/advisories/IMD%20Advisory-Outlook%20(RSMC)_201112290700.htm |archive-date=May 22, 2024 |df=mdy }} During the rest of that day, the system continued to move westwards and weakened slightly as it started to interact with land. Thane then made landfall as a very severe cyclonic storm early on December 30 on the north Tamil Nadu coast between Cuddalore and Pondicherry. After making landfall, Thane rapidly weaken into a depression before the JTWC issued their final advisory during December 30, while the IMD continued to monitor the remnants of Thane until the depression weakened into a well marked low-pressure area on December 31.{{cite report |author=Regional Specialised Meteorological Center New Delhi, India |publisher=India Meteorological Department |access-date=December 29, 2011 |url=http://www.imd.gov.in/section/nhac/dynamic/rsmc.html |archive-url=https://web.archive.org/web/20111222014118/http://www.imd.gov.in/section/nhac/dynamic/cwind.htm |title=Tropical Cyclone Thane Advisory Number:37 December 31, 2011 03z |archive-date=December 22, 2011 |url-status=dead |df=mdy-all }}
Overall, Thane was responsible for the deaths of 46 people with total damage to India, estimated at between 13 – {{ntsp|15000000000}} rupees (235 – {{ntsp|275000000}} USD).{{#tag:ref|The damage total was originally reported in crore of rupees and was converted via the Oanda Corporation website using the rates for January 1, 2012.{{cite web|publisher=Oanda Corporation|title=Historical Exchange Rates|date=August 17, 2012|access-date=August 18, 2012|url=http://www.oanda.com/currency/historical-rates/}}|group="nb"}}{{cite journal|issue=3 |journal=MAUSAM |author1=Khole, Medha |author2=Sunitha Devi, S. |author3=Mande, M. V. |date=June 5, 2012 |volume=63 |pages=369–376 |url=http://metnet.imd.gov.in/mausamdocs/46331.pdf |access-date=August 18, 2012 |title=Cyclones and depressions over the North Indian Ocean during 2011 |ref=551.515.1 (267) “2011” |publisher=India Meteorological Department |doi=10.54302/mausam.v63i3.1210 |s2cid=245638544 |archive-url=https://web.archive.org/web/20180918030856/http://metnet.imd.gov.in/mausamdocs/46331.pdf |archive-date=September 18, 2018 |url-status=live |df=mdy }}
{{Clear}}
Season effects
{{North Indian Ocean areas affected (Top)}}
|-
| BOB 01 || {{Sort|0202|February 2–3}} || bgcolor=#{{storm colour|DI}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|DI}}|{{Sort|045|{{convert|45|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|DI}}| 1002 || Sri Lanka ||297 million || 18 ||{{cite web|work=UN Office for the Coordination of Humanitarian Affairs|publisher=ReliefWeb|date=February 11, 2011|access-date=November 11, 2011|title=Sri Lanka: Monsoon Flood Update Situation Report 13 |url=http://reliefweb.int/sites/reliefweb.int/files/resources/74102ABFE9DAC5BAC12578360031639B-Full_Report.pdf}}
|-
| ARB 01 || {{Sort|0611|June 11–12}} || bgcolor=#{{storm colour|DI}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|DI}}|{{Sort|045|{{convert|45|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|DI}}|996 || India || || None ||
|-
| BOB 02 || {{Sort|0616|June 16–23}} || bgcolor=#{{storm colour|TD}}|{{Sort|2|Deep Depression}} || bgcolor=#{{storm colour|TD}}|{{Sort|065|{{convert|65|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|TD}}|978 || India || || 6 ||
|-
| LAND 01 || {{Sort|0722|July 22–23}} || bgcolor=#{{storm colour|DI}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|DI}}|{{Sort|35|{{convert|35|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|DI}}|990 || India || || 0 ||
|-
| BOB 03 || {{Sort|0922|September 22–23}} || bgcolor=#{{storm colour|DI}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|DI}}|{{Sort|045|{{convert|45|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|DI}}|995 || India || || 42 ||
|-
| BOB 04 || {{Sort|1019|October 19–20}} || bgcolor=#{{storm colour|TD}}|{{Sort|2|Deep Depression}} || bgcolor=#{{storm colour|TD}}|{{Sort|055|{{convert|55|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|TD}}|1002 || Bangladesh, Myanmar || {{ntsp|1640000}} || 215 ||
|-
| Keila || {{Sort|1029|October 29 – November 4}} || bgcolor=#{{storm colour|A1}}|{{Sort|3|Cyclonic Storm}} || bgcolor=#{{storm colour|A1}}|{{Sort|065|{{convert|65|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|A1}}|996 || Oman, Yemen || $80 million || 14 ||
|-
| ARB 03 || {{Sort|1106|November 6 – November 10}} || bgcolor=#{{storm colour|TD}}|{{Sort|2|Deep Depression}} || bgcolor=#{{storm colour|TD}}|{{Sort|055|{{convert|55|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|TD}}|1000 || colspan=3 style="text-align:center;" |No land areas affected.||
|-
| ARB 04 || {{Sort|1126|November 26 – December 1}} || bgcolor=#{{storm colour|TD}}|{{Sort|2|Deep Depression}} || bgcolor=#{{storm colour|TD}}|{{Sort|055|{{convert|55|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|TD}}|998 || Lakshadweep, India, Sri Lanka|| None || 19 ||
|-
| Thane || {{Sort|1225|December 25 – December 31}} || bgcolor=#{{storm colour|vsvrcyclstorm}}|{{Sort|5|Very Severe Cyclonic Storm}} || bgcolor=#{{storm colour|vsvrcyclstorm}}|{{Sort|140|{{convert|140|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm colour|vsvrcyclstorm}}|969 || India || 235 – {{ntsp|275000000}} || 46 ||
|-
{{TC Areas affected (Bottom)|TC's=10 systems|dates=February 2 – December 30|winds={{convert|140|km/h|mph|abbr=on|round=5}}|pres={{convert|969|hPa|inHg|sigfig=4|abbr=on}}|damage=>{{ntsp|276640000||$}}|deaths=>360|Refs=}}
See also
{{Portal|Tropical cyclones}}
- List of North Indian cyclone seasons
- Tropical cyclones in 2011
- 2011 Atlantic hurricane season
- 2011 Pacific hurricane season
- 2011 Pacific typhoon season
- South-West Indian Ocean cyclone seasons: 2010–11 2011–12
- Australian region cyclone seasons: 2010–11 2011–12
- South Pacific cyclone seasons: 2010–11 2011–12
- South Atlantic tropical cyclone
Notes
{{Reflist|group=nb}}
References
{{Reflist|2}}
External links
- [https://web.archive.org/web/20150517005046/http://www.imd.gov.in/section/nhac/dynamic/cyclone.htm India Meteorological Department]
- [http://www.usno.navy.mil/JTWC/ Joint Typhoon Warning Center] {{Webarchive|url=https://web.archive.org/web/20150809201922/http://www.usno.navy.mil/JTWC/ |date=August 9, 2015 }}
{{TC Decades|Year=2010|basin=North Indian Ocean|type=cyclone}}
{{2011 North Indian Ocean cyclone season buttons}}
{{Tropical cyclone season|2011}}
{{DEFAULTSORT:2011 North Indian Ocean Cyclone Season}}