Tropical Storm Lionrock (2021)

{{storm path|Lionrock 2021 track.png}}

On October 2 at 06:00 UTC, the United States Joint Typhoon Warning Center (JTWC){{#tag:ref|The Joint Typhoon Warning Center is a joint United States Navy – United States Air Force task force that issues tropical cyclone warnings for the western Pacific Ocean and other regions.{{cite web|publisher=Joint Typhoon Warning Center|title=Joint Typhoon Warning Center Mission Statement|year=2011|access-date=July 25, 2012|url=https://metocph.nmci.navy.mil/jtwc/menu/JTWC_mission.html|archive-url=https://web.archive.org/web/20070726103400/https://metocph.nmci.navy.mil/jtwc/menu/JTWC_mission.html|archive-date=July 26, 2007}}|group="nb"}} started to monitor a persistent area of convection in the Philippine Sea, located {{convert|495|nmi}} to the east of Davao City, Philippines. At that time, satellite visible imagery revealed a disorganized but broad area of circulation with flaring strong thunderstorms. Later analysis by the agency indicated a favorable environment for further development of the system, with warm {{cvt|30|C}} sea surface temperatures, low wind shear and good equatorial outflow.{{cite JTWC|date=October 2, 2021|access-date=October 8, 2021|type=|title=Significant Tropical Weather for the Western and South Pacific Oceans 020600Z-030600Z October 2021|url=https://wiki.chlod.net/jtwc/text/2021-10-02-0600-abpwweb.txt}}{{cite JTWC|date=October 2, 2021|access-date=October 8, 2021|type=|title=Significant Tropical Weather for the Western and South Pacific Oceans Reissued 021330Z-030600Z October 2021|url=https://wiki.chlod.net/jtwc/text/2021-10-02-1310-abpwweb.txt}} Meanwhile, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) upgraded the system to a tropical depression on 2:00 PHT (18:00 UTC) of October 3, assigning it the name Lannie from their naming list as it was already present in their Philippine Area of Responsibility.{{Cite web|last=Arceo|first=Acor|date=October 3, 2021|title=Tropical Depression Lannie develops amid COC filing|url=https://www.rappler.com/nation/weather/tropical-depression-lannie-pagasa-forecast-october-4-2021-5am|url-status=live|access-date=2021-10-08|website=Rappler|language=en|archive-date=2021-10-06|archive-url=https://web.archive.org/web/20211006045404/https://www.rappler.com/nation/weather/tropical-depression-lannie-pagasa-forecast-october-4-2021-5am}}{{Cite PAGASA|date=October 4, 2021|name=Lannie|type=tcb|no=6|category=TD|url=https://pubfiles.pagasa.dost.gov.ph/tamss/weather/bulletin.pdf|url-status=live|archive-date=2015-04-03|archive-url=https://web.archive.org/web/20150403161251/http://pubfiles.pagasa.dost.gov.ph/tamss/weather/bulletin.pdf}} [https://archive.org/download/pagasa-21-TC12/PAGASA_21-TC12_Lannie_TCB%2301.pdf Alt URL] Also that day, the JTWC issued a Tropical Cyclone Formation Alert on the system as it showed enough convection on the west of a discernible low-level circulation center while tracking west-northwestward.{{cite JTWC|date=October 2, 2021|access-date=October 4, 2021|type=tcfa|designation=92W|url=https://wiki.chlod.net/jtwc/text/2021-10-02-2230-wp9221web.txt}}

However, a trough associated with the disturbance crossed the Philippines, the JTWC subsequently canceled their TCFA on the system and lowered the probability of the system's development to "medium".{{cite JTWC|date=October 3, 2021|access-date=October 4, 2021|type=tcfa|designation=92W|cancelled=1|url=https://wiki.chlod.net/jtwc/text/2021-10-03-2210-wp9221web.txt}} The PAGASA, however, continued to track Lannie as it made 8 landfalls in the country; first at 04:30 PHT (20:00 UTC) on Bucas Grande Island, then on Cagdianao in the Dinagat Islands, then over Liloan and Padre Burgos in Southern Leyte, then Mahanay Island and Getafe in Bohol, San Fernando in Cebu then over Guihulngan, Negros Oriental before emerging into the Sulu Sea. Continuing its track to the west-northwest, it made two more landfalls in Palawan; one on Iloc Island in Linapacan and over El Nido before finally moving over and accelerated into the South China Sea.{{Cite web|last=Arceo|first=Acor|date=October 5, 2021|title=Tropical Depression Lannie makes last 2 landfalls in Palawan|url=https://www.rappler.com/nation/weather/tropical-depression-lannie-pagasa-forecast-october-5-2021-8am|url-status=live|access-date=2021-10-08|website=Rappler|language=en|archive-date=2021-10-05|archive-url=https://web.archive.org/web/20211005040143/https://www.rappler.com/nation/weather/tropical-depression-lannie-pagasa-forecast-october-5-2021-8am}}{{Cite web|last=Arceo|first=Acor|title=Tropical Depression Lannie starts moving away; new LPA may enter PAR|url=https://www.rappler.com/nation/weather/tropical-depression-lannie-lpa-pagasa-forecast-october-5-2021-5pm|url-status=live|access-date=2021-10-08|website=Rappler|date=5 October 2021 |language=en|archive-date=2021-10-05|archive-url=https://web.archive.org/web/20211005131621/https://www.rappler.com/nation/weather/tropical-depression-lannie-lpa-pagasa-forecast-october-5-2021-5pm}} At 14:30 UTC of October 4, the JTWC reissued a TCFA once again on the system as it reorganized along with a conducive environment in the area.{{cite JTWC|date=October 4, 2021|type=tcfa|designation=92W|url=https://wiki.chlod.net/jtwc/text/2021-10-04-1430-wp9221web.txt|access-date=October 5, 2021|}} A day later at 06:00 UTC, the Japan Meteorological Agency (JMA){{#tag:ref|The Japan Meteorological Agency is the official Regional Specialized Meteorological Center for the western Pacific Ocean.{{cite web|publisher=Japan Meteorological Agency|title=Annual Report on Activities of the RSMC Tokyo – Typhoon Center 2000|date=February 2001|access-date=July 29, 2017|url=http://www.jma.go.jp/jma/jma-eng/jma-center/rsmc-hp-pub-eg/AnnualReport/2000/Text/Text2000.pdf|page=3|archive-date=October 31, 2015|archive-url=https://web.archive.org/web/20151031002308/http://www.jma.go.jp/jma/jma-eng/jma-center/rsmc-hp-pub-eg/AnnualReport/2000/Text/Text2000.pdf|url-status=live}}|group="nb"}} recognized the system in their bulletins as a tropical depression.{{cite web|date=October 5, 2021|title=WWJP27 RJTD 050600|url=https://tgftp.nws.noaa.gov/data/raw/ww/wwjp27.rjtd..txt|url-status=live|archive-url=https://archive.today/20211005083519/https://tgftp.nws.noaa.gov/data/raw/ww/wwjp27.rjtd..txt|archive-date=October 5, 2021|access-date=October 5, 2021|publisher=Japan Meteorological Agency|location=Tokyo, Japan}} Lannie exited the PAR at 11:00 PhST (03:00 UTC) on October 6 as it slightly inclined northwestward.{{Cite PAGASA|date=October 6, 2021|name=Lannie|type=tcb|no=15-FINAL|category=TD|url=https://pubfiles.pagasa.dost.gov.ph/tamss/weather/bulletin.pdf|archive-url=https://web.archive.org/web/20150403161251/http://pubfiles.pagasa.dost.gov.ph/tamss/weather/bulletin.pdf|url-status=live|archive-date=2015-04-03|access-date=October 7, 2021}} [https://archive.org/download/pagasa-21-TC12/PAGASA_21-TC12_Lannie_TCB%2315-FINAL.pdf Alt URL]

On October 7 at 09:00 UTC, the JTWC further upgraded the storm to a tropical depression, receiving the designation 22W from the agency. The system, at that time, also consolidated further while transitioning to a monsoon depression as it continued to maintain a broad center with its wind field contracting along with 25-30 knot winds occurring in its core.{{cite JTWC|date=October 7, 2021|type=prog|category=TD|no=1|designation=22W|name=Twenty Two|url=https://wiki.chlod.net/jtwc/prog/2021-10-07-0920-wp2221prog.txt}} Meanwhile, while centered over the northern Paracel Islands, the JMA reported that the system intensified to a tropical storm according to surface wind analysis and Dvorak ratings, nine hours later. The agency named the system Lionrock while the storm became stationary due to weak steering flow.{{cite web|url=https://www.wis-jma.go.jp/d/o/RJTD/Alphanumeric/Warning/Tropical_cyclone/20211007/180000/A_WTPQ30RJTD071800_C_RJTD_20211007202016_14.txt|title=RSMC Prognostic Reasoning No.4 for Tropical Storm Lionrock (2117)|publisher=Japan Meteorological Agency|location=Tokyo, Japan|date=October 7, 2021|access-date=October 8, 2021|archive-url=https://archive.today/20211008024949/https://www.wis-jma.go.jp/d/o/RJTD/Alphanumeric/Warning/Tropical_cyclone/20211007/180000/A_WTPQ30RJTD071800_C_RJTD_20211007202016_14.txt|archive-date=October 8, 2021|url-status=live}} However, the JTWC only followed suit on the next day as it turned northward as it was steered by the southwestern periphery of a subtropical ridge located to the northeast.{{cite JTWC|date=October 8, 2021|type=prog|category=TS|no=4|designation=22W|name=Lionrock|url=https://tgftp.nws.noaa.gov/data/raw/wd/wdpn31.pgtw..txt|archive-url=https://archive.today/20211008025149/https://tgftp.nws.noaa.gov/data/raw/wd/wdpn31.pgtw..txt|archive-date=October 8, 2021}} The storm maintained this intensity before making landfall over Qionghai on 22:50 CST (14:50 UTC), further organizing its LLCC and its overall structure while located inland. It subsequently reintensified to its peak winds of {{convert|40|kn|round=5}}, ten minutes later.{{Cite web|date=October 8, 2021|title=台风"狮子山"登陆海南琼海 将联合冷空气在华南制造强风雨|url=http://www.hkwb.net/news/content/2021-10/08/content_4013164.htm|url-status=dead|archive-url=https://archive.today/20211009072948/http://www.hkwb.net/news/content/2021-10/08/content_4013164.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=m.hkwb.net}}{{cite JTWC|date=October 8, 2021|type=prog|category=TS|designation=22W|no=6|name=Lionrock|url=https://wiki.chlod.net/jtwc/prog/2021-10-08-1510-wp2221prog.txt|access-date=October 10, 2021}} However, it weakened slightly while over the central part of the island, although its convective banding continued to consolidate.{{cite JTWC|date=October 9, 2021|type=prog|category=TS|designation=22W|no=9|name=Lionrock|url=https://wiki.chlod.net/jtwc/prog/2021-10-09-0820-wp2221prog.txt|access-date=October 10, 2021}}

Early on October 9, Lionrock emerged into the very warm and conducive waters of the Gulf of Tonkin. However, it maintained its intensity of {{convert|35|kn|round=5}} before it made its last landfall over Haiphong, near Cat Bi International Airport on 09:00 UTC on the next day, with the JTWC issuing its final warning as a tropical depression. Although, its LLC remained somewhat defined on radar imagery but its winds weakened upon moving inland.{{cite JTWC|date=October 10, 2021|type=warn|category=TD|designation=22W|no=13-FINAL|name=Lionrock|url=https://www.metoc.navy.mil/jtwc/products/wp2221prog.txt|archive-url=https://archive.today/20211010083734/https://tgftp.nws.noaa.gov/data/raw/wt/wtpn31.pgtw..txt|archive-date=October 10, 2021|access-date=October 10, 2021}} The JMA also downgraded Lionrock to a depression three hours back as it tracked westward while over Quảng Ninh Province of Vietnam.{{cite web|date=October 10, 2021|title=RSMC Tropical Cyclone Advisory|url=https://tgftp.nws.noaa.gov/data/raw/wt/wtpq50.rjtd..txt|archive-url=https://web.archive.org/web/20211010080823/https://tgftp.nws.noaa.gov/data/raw/wt/wtpq50.rjtd..txt|archive-date=October 10, 2021|access-date=October 10, 2021|publisher=Japan Meteorological Agency|location=Tokyo, Japan}}

File:Lannie 2021-10-04 0524Z.jpg

Upon the PAGASA's designation for the storm, several areas in Mimaropa, whole Visayas and northeastern Mindanao were placed under storm signal #1.{{Cite web|last=|first=|date=2021-10-04|title=23 areas under Signal No. 1 due to Tropical Depression Lannie|url=https://www.gmanetwork.com/news/scitech/weather/805598/23-areas-under-signal-no-1-due-to-tropical-depression-lannie/story/|url-status=live|archive-url=https://web.archive.org/web/20211006015605/https://www.gmanetwork.com/news/scitech/weather/805598/23-areas-under-signal-no-1-due-to-tropical-depression-lannie/story/|archive-date=2021-10-06|access-date=2021-10-06|website=GMA News Online|language=en}} The weather agency also warned flash floods, heavy rains, landslides and gusty winds from Lannie as the system moved over the country.{{Cite web|last=|first=|title=24 areas under Signal No. 1 as Lannie threatens Southern Leyte|url=https://www.gmanetwork.com/news/scitech/weather/805601/24-areas-under-signal-no-1-as-lannie-threatens-southern-leyte/story/|url-status=live|archive-url=https://web.archive.org/web/20211006020235/https://www.gmanetwork.com/news/scitech/weather/805601/24-areas-under-signal-no-1-as-lannie-threatens-southern-leyte/story/|archive-date=2021-10-06|access-date=2021-10-06|website=GMA News Online|date=4 October 2021|language=en}} Gale warnings were also in effect.{{Cite web|last=|first=|date=2021-10-06|title=Lannie to exit PAR in a few hours|url=https://www.gmanetwork.com/news/scitech/weather/805866/lannie-to-exit-par-in-a-few-hours/story/|url-status=live|archive-url=https://web.archive.org/web/20211006023609/https://www.gmanetwork.com/news/scitech/weather/805866/lannie-to-exit-par-in-a-few-hours/story/|archive-date=2021-10-06|access-date=2021-10-06|website=GMA News Online|language=en}}

Metro Manila and some provinces in Luzon, including Isabela and Cagayan experienced heavy downpours from the "trough extension" of Lannie. In Siraway, Zamboanga del Norte, some residents living in the area were evacuated due to the same effect, causing waistline floods while nearly 200 families in Pikit, Cotabato City were rescued due to rain-induced flash floods that occurred from October 3–4.{{Cite web|date=2021-10-04|title=Panayam kay PAGASA weather specialist Chris Perez kaugnay sa Bagyong 'Lannie' {{!}} Videos|url=https://www.gmanetwork.com/news/video/balitanghali/572663/panayam-kay-pagasa-weather-specialist-chris-perez-kaugnay-sa-bagyong-lannie/video/|url-status=live|archive-url=https://web.archive.org/web/20211006020934/https://www.gmanetwork.com/news/video/balitanghali/572663/panayam-kay-pagasa-weather-specialist-chris-perez-kaugnay-sa-bagyong-lannie/video/|archive-date=2021-10-06|access-date=2021-10-06|website=GMA News Online|language=tagalog}} A family of three were also moved into safety by the Philippine Coast Guard (PCG) on October 4 when their boat sank during the high waves from the storm between Pamilacan Island and Loay, Bohol while two more fishermen were rescued by the authorities off Abacan River in Cortes.{{Cite web|last=Udtohan|first=Leo|date=2021-10-04|title=Family rescued from capsized boat off Loay, Bohol|url=https://www.gmanetwork.com/news/news/regions/805714/family-rescued-from-capsized-boat-off-loay-bohol/story/|url-status=live|archive-url=https://web.archive.org/web/20211006021942/https://www.gmanetwork.com/news/news/regions/805714/family-rescued-from-capsized-boat-off-loay-bohol/story/|archive-date=2021-10-06|access-date=2021-10-06|website=GMA News Online|language=en}} In Tanjay, a man slipped into a spillway and were subsequently helped by stranded residents near the area while 50 households were evacuated to safety as a river overflowed in Bais, Negros Oriental. Landslides were also reported on Cebu City and Talisay City while vaccination activities for October 5 on Zamboanga City were canceled as a result of bad weather and its resultant flooding in houses and rice fields.{{Cite web|last=|first=|date=2021-10-05|title=Heavy rains from Lannie cause flooding in several areas|url=https://www.gmanetwork.com/news/news/regions/805736/heavy-rains-from-lannie-cause-flooding-in-several-areas/story/|url-status=live|archive-url=https://web.archive.org/web/20211006022725/https://www.gmanetwork.com/news/news/regions/805736/heavy-rains-from-lannie-cause-flooding-in-several-areas/story/|archive-date=2021-10-06|access-date=2021-10-06|website=GMA News Online|language=en}} Five vessels and fifteen passengers in Palawan were stranded as a result of Lannie, the PCG reported on the same day.{{Cite web|last=Noriega|first=Richa|date=2021-10-06|title=PCG: 15 passengers, 5 vessels stranded in Palawan due to Lannie|url=https://www.gmanetwork.com/news/news/regions/805824/pcg-15-passengers-5-vessels-stranded-in-palawan-due-to-lannie/story/|url-status=live|archive-url=https://web.archive.org/web/20211006023035/https://www.gmanetwork.com/news/news/regions/805824/pcg-15-passengers-5-vessels-stranded-in-palawan-due-to-lannie/story/|archive-date=2021-10-06|access-date=2021-10-06|website=GMA News Online|language=en}}

Four fatalities were already reported in the country as a result of the storm, three due to drowning in Capiz and Cebu and the other one is for unknown reason in Balasan.{{Cite web|last=Perez|first=Annie|date=2021-10-05|title=Indian man, teen girl drown in Cebu province|url=https://news.abs-cbn.com/news/10/06/21/indian-man-teen-girl-drown-in-cebu-province|url-status=dead|archive-url=https://web.archive.org/web/20211006025458/https://news.abs-cbn.com/news/10/06/21/indian-man-teen-girl-drown-in-cebu-province|archive-date=2021-10-06|access-date=2021-10-06|website=ABS-CBN News}}{{Cite web|date=October 5, 2021|title='Lannie' drenches Capiz, Iloilo City|url=https://www.pna.gov.ph/articles/1155680|url-status=live|access-date=2021-10-08|website=www.pna.gov.ph|language=en|archive-date=2021-10-05|archive-url=https://web.archive.org/web/20211005195248/https://www.pna.gov.ph/articles/1155680}} Damages in Western Visayas were calculated to be at {{Ntsp|1600000|3=₱}} (US$31,600).{{Cite web|last=Rita|first=Joviland|date=2021-10-06|title=NDRRMC verifying reported casualty in Capiz due to Lannie|url=https://www.gmanetwork.com/news/news/regions/805875/ndrrmc-verifying-reported-casualty-in-capiz-due-to-lannie/story/|url-status=live|archive-url=https://web.archive.org/web/20211006024917/https://www.gmanetwork.com/news/news/regions/805875/ndrrmc-verifying-reported-casualty-in-capiz-due-to-lannie/story/|archive-date=2021-10-06|access-date=2021-10-06|website=GMA News Online}} According to the National Disaster Risk Reduction and Management Council (NDRRMC), 248 persons were displaced by Lannie and 1,701 families (8,048 individuals) were affected. 10 roadways were also disrupted and 77 seaports canceled sea operations. 19 houses and over {{Convert|942.03|ha|abbr=on}} of farmland were damaged. Total damages from the storm were stood at {{Ntsp|12225109|3=₱}} (US$241,000) as of October 7.{{Cite web|date=October 7, 2021|title=Infographics for Tropical Depression Lannie (October 7, 2021)|url=https://monitoring-dashboard.ndrrmc.gov.ph/exports/infographics/situational-report-for-tropical-depression-lannie-2021/558/08-1633657063|url-status=live|archive-url=https://web.archive.org/web/20211008013851/https://monitoring-dashboard.ndrrmc.gov.ph/exports/infographics/situational-report-for-tropical-depression-lannie-2021/558/08-1633657063|archive-date=October 8, 2021|access-date=October 8, 2021|website=NDRRMC}}

Despite Lionrock being far away from Hong Kong and Macau, its large windfield prompted a Strong Wind Signal No. 3 for the territories.{{Cite web|date=October 8, 2021|title=Tropical Cyclone Warning No. 1 for Tropical Storm Lionrock|url=https://www.hko.gov.hk/en/wxinfo/currwx/tc1.htm|url-status=dead|archive-url=https://web.archive.org/web/20211008011756/https://www.hko.gov.hk/en/wxinfo/currwx/tc1.htm|archive-date=October 8, 2021|access-date=October 8, 2021|website=Hong Kong Observatory}}{{Cite web|date=October 8, 2021|title=Tropical Cyclone Warning Number 3 for Tropical Storm Lionrock|url=https://www.smg.gov.mo/en/subpage/28/typhoon-main|url-status=dead|archive-url=https://archive.today/20211008030522/https://www.smg.gov.mo/en/subpage/28/typhoon-main|archive-date=October 8, 2021|access-date=October 8, 2021|website=Direcção dos Serviços Meteorológicos e Geofisicos}} Further, it was upgraded to No. 8 Southeast Gale or Storm Signal on October 9 and it lasted 22 hours before being beaten by Kompasu a few days later at 23 hours and 20 minutes. In addition, Lionrock was 560 km away from Hong Kong when it triggered the issuance of Signal 8 by the HKO beating the previous record held by Nangka the year before at 450 km.{{Cite web|date=October 9, 2021|title=Tropical Cyclone Warning for Tropical Storm Lionrock by the HKO (06:45 HKT 09/Oct/2021)|url=https://www.hko.gov.hk/en/wxinfo/currwx/tc3.htm|url-status=dead|archive-url=https://archive.today/20211008234338/https://www.hko.gov.hk/en/wxinfo/currwx/tc3.htm|archive-date=October 8, 2021|access-date=October 9, 2021|website=Hong Kong Observatory}}{{Cite web|date=October 9, 2021|title=Tropical Cyclone Warning Number 3 for Tropical Storm Lionrock by SMG (2021-10-09 07:00)|url=https://www.smg.gov.mo/en/subpage/28/typhoon-main|url-status=dead|archive-url=https://archive.today/20211008234513/https://www.smg.gov.mo/en/subpage/28/typhoon-main|archive-date=October 8, 2021|access-date=October 9, 2021|website=Direcção dos Serviços Meteorológicos e Geofisicos}}{{cite web|first=|date=22 October 2021|title=Kompasu to strengthen into severe tropical storm, come close to HK on Wednesday|url=https://www.thestandard.com.hk/breaking-news/section/4/181360/Kompasu-to-strengthen-into-severe-tropical-storm,-come-close-to-HK-on-Wednesday|url-status=live|access-date=29 December 2021|archive-date=21 October 2021|archive-url=https://web.archive.org/web/20211021232515/https://www.thestandard.com.hk/breaking-news/section/4/181360/Kompasu-to-strengthen-into-severe-tropical-storm,-come-close-to-HK-on-Wednesday}}

On October 8, a 52-year old Frenchman was killed while his 57-year old friend was injured when their sailboats sank due to strong winds from the storm off Po Toi Island, Beaufort Island in Hong Kong.{{Cite news|last=Chan|first=Erin|date=October 8, 2021|title=One dead after monsoon triggers sailing mishap|work=The Standard|url=https://www.thestandard.com.hk/section-news/section/4/234904/One-dead-after-monsoon-triggers-sailing-mishap|url-status=live|access-date=October 8, 2021|archive-url=https://archive.today/20211008031907/https://www.thestandard.com.hk/section-news/section/4/234904/One-dead-after-monsoon-triggers-sailing-mishap|archive-date=October 8, 2021}} A tree uprooted in Tsuen Wan-bound Lung Cheung Road, disrupting a lane while downed trees also affected Kowloon City, Prince Edward Road West and Cheung Fai Road in Tsing Yi. Scaffolding also fell on a street in Wong Tai Sin and over Broadwood Road due to strong winds from Lionrock, trapping two people in their respective cars. Two female workers were also stranded inside. They were rescued subsequently by authorities, with one of them being unconscious. She died subsequently, being the second casualty from the storm in the territory.{{Cite news|date=October 8, 2021|title=One dead as scaffolding collapses on Broadwood Road|work=The Standard|url=https://www.thestandard.com.hk/breaking-news/section/4/181299/Scaffolding-collapses-onto-cars-on-Broadwood-Road,-workers-trapped|url-status=live|access-date=October 8, 2021|archive-url=https://archive.today/20211009055056/https://www.thestandard.com.hk/breaking-news/section/4/181299/Scaffolding-collapses-onto-cars-on-Broadwood-Road,-workers-trapped|archive-date=October 9, 2021}} On October 9, Ngong Ping recorded winds of {{convert|105|km/h|abbr=on}} and gusts of {{convert|139|km/h|abbr=on}} while the territory recorded {{convert|329.7|mm|in|abbr=on}} of rainfall on October 8.{{Cite web|date=October 8, 2021|title=Yesterday's Weather and Radiation Level, October 8 of 2021|url=https://www.hko.gov.hk/en/wxinfo/pastwx/past.htm|url-status=dead|archive-url=https://archive.today/20211009070231/https://www.hko.gov.hk/en/wxinfo/pastwx/ryes.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=Hong Kong Observatory}} The direct economic loss was estimated at HK$220 million (US$28.3 million).{{cite web|url=https://www.hko.gov.hk/en/publica/tc/tc2021/annex1.html|title=Annex 1: Estimated Direct Economic Losses in Hong Kong caused by Tropical Storm Lionrock (2117) and Typhoon Kompasu (2118)|work=Hong Kong Observatory|date=November 18, 2022|access-date=November 18, 2022}}

In Macau, six people suffered slight injury in related to the storm, but overall effects were minimal.{{cite web|url=https://www.gov.mo/zh-hant/news/822234/|title=熱帶風暴“獅子山”工作總結|work=Government of Macau|date=October 10, 2021|access-date=October 15, 2021|archive-url=https://web.archive.org/web/20211016090907/https://www.gov.mo/zh-hant/news/822234/|archive-date=October 16, 2021|url-status=live|language=Chinese}}

Emergency response teams with 95 vehicles, 2,471 people, 438 emergency repair vehicles and 358 generators were put on standby as Lionrock approached Hainan Island. The area's electric company also trimmed tree branches as a precaution for blackouts. 12 bus lines passing over the university town in Haikou were suspended as a result of the storm while the Haikou Crater Park were closed starting on October 8.{{Cite web|date=October 9, 2021|title=海南电网启动防风防汛三级响应 迎战台风"狮子山"[图]|url=http://m.hkwb.net/content/2021-10/09/content_4013143.htm|url-status=dead|archive-url=https://archive.today/20211009000535/http://m.hkwb.net/content/2021-10/09/content_4013143.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=m.hkwb.net}}{{Cite web|date=October 8, 2021|title=海口12条途经大学城的公交线路暂停发班|url=http://m.hkwb.net/content/2021-10/08/content_4013102.htm|url-status=dead|archive-url=https://archive.today/20211009024802/http://m.hkwb.net/content/2021-10/08/content_4013102.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=m.hkwb.net}}{{Cite web|date=October 8, 2021|title=海口火山口公园8日16时起暂时闭园|url=http://m.hkwb.net/content/2021-10/08/content_4012976.htm|url-status=dead|archive-url=https://archive.today/20211009024833/http://m.hkwb.net/content/2021-10/08/content_4012976.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=m.hkwb.net}} 290 drainage workers also inspected drainage facilities on Hainan on October 8 while 75 individuals from Longhua District were relocated from their houses to a safe place to ride out the storm.{{Cite web|date=October 8, 2021|title=海口290名排水工人清晨出动巡检排水设施|url=http://m.hkwb.net/content/2021-10/08/content_4012952.htm|url-status=dead|archive-url=https://archive.today/20211009024905/http://m.hkwb.net/content/2021-10/08/content_4012952.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=m.hkwb.net}}{{Cite web|date=October 9, 2021|title=防御台风 海口龙华区已转移危房群众75人[图]|url=http://m.hkwb.net/content/2021-10/08/content_4013078.htm|url-status=dead|archive-url=https://archive.today/20211009025111/http://m.hkwb.net/content/2021-10/08/content_4013078.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=m.hkwb.net}} Over 3,434 people from the area were evacuated while more than 20,000 fishing boats and vessels were asked to return to ports due to Lionrock.{{Cite web|title=海南2万余艘渔船陆续回港避风|url=http://www.hkwb.net/news/content/2021-10/08/content_4012756.htm|url-status=dead|archive-url=https://archive.today/20211009062929/http://www.hkwb.net/news/content/2021-10/08/content_4012756.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=hkwb.net}}{{Cite web|date=October 8, 2021|title=海南已紧急避险转移人口3434人|url=http://www.hkwb.net/news/content/2021-10/08/content_4012786.htm|url-status=dead|archive-url=https://archive.today/20211009062939/http://www.hkwb.net/news/content/2021-10/08/content_4012786.htm|archive-date=October 9, 2021|access-date=October 9, 2021|website=hkwb.net}} A blue warning was issued for mainland southeastern China, on the same day.{{Cite web|title=China, Vietnam - Tropical cyclone LIONROCK (GDACS, JTWC, CMA) (ECHO Daily Flash of 8 October 2021) - China|url=https://reliefweb.int/report/china/china-vietnam-tropical-cyclone-lionrock-gdacs-jtwc-cma-echo-daily-flash-8-october-2021|access-date=2021-10-09|website=ReliefWeb|date=8 October 2021 |language=en|archive-date=2021-10-09|archive-url=https://web.archive.org/web/20211009074654/https://reliefweb.int/report/china/china-vietnam-tropical-cyclone-lionrock-gdacs-jtwc-cma-echo-daily-flash-8-october-2021|url-status=live}}

In Zhuhai, heavy rainfall fell due to Lionrock in various places, with {{Convert|687.1|mm|in}} being recorded from October 8 to 10 in Wanshan Town, leading to the storm being one of the wettest tropical cyclones ever recorded, in mainland China. Guangdong-Macao Intensive Cooperation Zone in Hengqin reported a rain accumulation of {{Convert|240.9|mm|in}} on October 10, Xiangzhou District at {{Convert|237.2|mm|in}} and Huangmaozhou Island at {{Convert|228.0|mm|in}} on that day.{{Cite web|date=October 10, 2021|title="狮子山"太猛，珠海这三天降雨时长刷新纪录！|url=https://pub-zhtb.hizh.cn/a/202110/10/AP6162c78ae4b052b25471d52c.html|url-status=live|archive-url=https://archive.today/20211011054411/https://pub-zhtb.hizh.cn/a/202110/10/AP6162c78ae4b052b25471d52c.html|archive-date=October 11, 2021|access-date=October 11, 2021|website=pub-zhtb.hizh.cn|language=chinese}} Many roadways were flooded and impassable, causing the cancellation of buses and the restriction of residents in the area. More than 60 shelters were also opened in Xiangzhou for possible evacuees. Traffic authorities on the area implemented traffic control from October 10. Ship activities were also suspended.{{Cite web|date=October 10, 2021|title=珠海遭遇紅色暴雨襲城 公交停運致居民出行嚴重受限|url=https://news.sina.com.tw/article/20211010/40180598.html|url-status=live|archive-url=https://archive.today/20211011060028/https://news.sina.com.tw/article/20211010/40180598.html|archive-date=October 11, 2021|access-date=October 11, 2021|website=新浪新聞中心}} Hengqin Bridge were also closed for motorists due to heavy downpours.{{Cite web|date=October 10, 2021|title=注意绕行！珠海横琴大桥目前已封闭|url=https://pub-zhtb.hizh.cn/a/202110/10/AP61626b0ce4b0cc12e3669ba9.html|url-status=live|archive-url=https://archive.today/20211011060911/https://pub-zhtb.hizh.cn/a/202110/10/AP61626b0ce4b0cc12e3669ba9.html|archive-date=October 11, 2021|access-date=October 11, 2021|website=pub-zhtb.hizh.cn|language=chinese}} Power in the city were also cut as a precaution; its electric company Zhuhai Power Supply Bureau promised that electricity will be restored as conditions become better.{{Cite web|date=October 10, 2021|title=橫琴下村水浸嚴重已停電 (2021.10.10 13:29)|url=https://www.tdm.com.mo/c_news/radio_news.php?id=535800|url-status=live|archive-url=https://archive.today/20211011061307/https://www.tdm.com.mo/c_news/radio_news.php?id=535800|archive-date=October 11, 2021|access-date=October 11, 2021|website=www.tdm.com.mo|language=zh}}

In Zhongshan, rainfall exceeding {{Convert|100|mm|in}} were reported on Tanzhou, Sanxiang and other places in its south while the Wugai Mountain at over {{Convert|70|mm|in}}. Primary and secondary schools in some districts were closed as a result.{{Cite web|date=October 10, 2021|title=中山发布暴雨红色预警，南部、中心片区停课_新闻频道_中山网|url=http://www.zsnews.cn/news/index/view/cateid/35/id/674627.html|url-status=live|archive-url=https://archive.today/20211011061651/http://www.zsnews.cn/news/index/view/cateid/35/id/674627.html|archive-date=October 11, 2021|access-date=October 10, 2021|website=www.zsnews.cn|language=zh}} Authorities in the area performed several rescues on people being stranded in floods and those who can't evacuate themselves. Cars were also inundated by these floods. 165 people in total were rescued and 65 were evacuated to safety.{{Cite web|date=October 11, 2021|title=倾盆大雨挡不住救援的脚步_新闻频道_中山网|url=http://www.zsnews.cn/news/index/view/cateid/35/id/674657.html|url-status=live|archive-url=https://archive.today/20211011062236/http://www.zsnews.cn/news/index/view/cateid/35/id/674657.html|archive-date=October 11, 2021|access-date=October 11, 2021|website=www.zsnews.cn|language=zh}} The direct economic loss reached ¥290 million (US$45 million).{{cite web|url=https://www.mem.gov.cn/xw/yjglbgzdt/202111/t20211102_401401.shtml|title=应急管理部发布2021年10月全国自然灾害情况|work=Ministry of Emergency Management|date=November 2, 2021|access-date=March 1, 2022|archive-url=https://web.archive.org/web/20220302175734/https://www.mem.gov.cn/xw/yjglbgzdt/202111/t20211102_401401.shtml|archive-date=March 2, 2022|url-status=live|language=Chinese}}

From night of October 7 to October 8, coastal provinces from Quảng Trị to Quảng Nam received enduring heavy rainfall, with Thượng Lộ on Thừa Thiên Huế recording {{Convert|247.0|mm|in}}, Thuy Yen reservoir at {{Convert|216.0|mm|in}} and Nam Dong at {{Convert|205.0|mm|in}}. Floods swept away one person and seven cattles in Duy Xuyên District, Quảng Nam Province{{Cite web|date=October 8, 2021|title=Báo cáo nhanh công tác trực ban PCTT ngày 08/10/2021|url=http://phongchongthientai.mard.gov.vn/Pages/bao-cao-nhanh-cong-tac-truc-ban-pctt-ngay-08-10-2021.aspx|url-status=live|archive-url=https://web.archive.org/web/20211009050849/http://phongchongthientai.mard.gov.vn/Pages/bao-cao-nhanh-cong-tac-truc-ban-pctt-ngay-08-10-2021.aspx|archive-date=October 9, 2021|access-date=October 9, 2021|website=phongchongthientai.mard.gov.vn}} On Saturday, the victim was confirmed dead. On the same day, the storm killed one sailor in Thái Bình province.{{Cite web|date=October 9, 2021|title=Báo cáo nhanh công tác trực ban PCTT ngày 09/10/2021|url=http://phongchongthientai.mard.gov.vn/Pages/bao-cao-nhanh-cong-tac-truc-ban-pctt-ngay-09-10-2021.aspx|url-status=live|access-date=October 11, 2021|website=phongchongthientai.mard.gov.vn|language=vi|archive-date=October 10, 2021|archive-url=https://web.archive.org/web/20211010052520/http://phongchongthientai.mard.gov.vn/Pages/bao-cao-nhanh-cong-tac-truc-ban-pctt-ngay-09-10-2021.aspx}} As Lionrock made its landfall over the country on October 10, torrential downpours also affected several provinces in the country. Nam Xay Luong 3 in Lao Cai reported {{Convert|195.0|mm|in}} of rainfall and Ta Si Lang in Yen Bai at {{Convert|189.0|mm|in}}.{{Cite web|date=October 10, 2021|title=Báo cáo nhanh công tác trực ban PCTT ngày 10/10/2021|url=http://phongchongthientai.mard.gov.vn/Pages/bao-cao-nhanh-cong-tac-truc-ban-pctt-ngay-10-10-2021.aspx|url-status=live|access-date=October 11, 2021|website=phongchongthientai.mard.gov.vn|language=vi|archive-date=October 11, 2021|archive-url=https://web.archive.org/web/20211011070701/http://phongchongthientai.mard.gov.vn/Pages/bao-cao-nhanh-cong-tac-truc-ban-pctt-ngay-10-10-2021.aspx}} Total damage was amounted to ₫32 billion (US$1.4 million).{{cite report|url=https://phongchongthientai.mard.gov.vn/FileUpload/2024-02/q8pgliDf-0CQaGXqThiệt%20hại%202021%20web.pdf|title=CÔNG BỐ SỐ LIỆU THIỆT HẠI DO THIÊN TAI GÂY RA TRONG PHẠM VI CẢ NƯỚC NĂM 2021|work=Vietnam Disaster Management|date=February 21, 2024|access-date=February 22, 2024|language=Vietnamese}}

The remnants of Lionrock caused flooding in Isan. 6,251 households were affected by the flooding, but no casualties were reported.{{cite web|url=https://reliefweb.int/report/thailand/thailand-flooding-8-provinces-tc-lionrock-8-oct-2021|title=Thailand, Flooding in 8 Provinces (TC Lionrock) (8 Oct 2021)

|publisher=ReliefWeb|date=October 8, 2021|access-date=December 8, 2021|archive-url=https://web.archive.org/web/20211209115612/https://reliefweb.int/report/thailand/thailand-flooding-8-provinces-tc-lionrock-8-oct-2021|archive-date=December 9, 2021|url-status=live}}

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{{Portal|Tropical cyclones|Philippines}}

• Weather of 2021
• Tropical cyclones in 2021
• Tropical Storm Kujira (2015) – Made landfall in a similar area in June 2015 and took a similar path
• Tropical Storm Sinlaku (2020) – Made landfall in a similar area in August 2020
• Tropical Storm Prapiroon (2024) – Made landfall in a similar area in July 2024, also the first tropical cyclone to hit Vietnam in 640 days.

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• [http://agora.ex.nii.ac.jp/digital-typhoon/summary/wnp/s/202117.html.en JMA General Information] of Tropical Storm Lionrock (2117) from Digital Typhoon
• [http://www.data.jma.go.jp/fcd/yoho/data/typhoon/T2117.pdf JMA Best Track Data] of Tropical Storm Lionrock (2117) {{in lang|ja}}
• [http://www.data.jma.go.jp/fcd/yoho/data/typhoon/T2117.png JMA Best Track Data (Graphics)] of Tropical Storm Lionrock (2117)
• [https://web.archive.org/web/20211008014826/https://www.nrlmry.navy.mil/tcdat/tc2021/WP/WP222021/txt/trackfile.txt JTWC Best Track Data] of Tropical Storm 22W (Lionrock)
• [https://web.archive.org/web/20211008014824/https://www.nrlmry.navy.mil/tcdat/tc21/WPAC/22W.LIONROCK/ 22W.LIONROCK] from the U.S. Naval Research Laboratory

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Category:2021 Pacific typhoon season

Lionrock

Category:Typhoons in the Philippines

Category:Typhoons in China

Category:Typhoons in Vietnam

Category:October 2021 in Asia

Lionrock