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Tropical Storm Lupit (2021)

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This article is about the 2021 tropical storm. For other uses, see Typhoon Lupit.
Tropical Storm Lupit (Huaning)
Tropical storm (JMA scale)
Tropical storm (SSHWS)
Tropical Storm Lupit at near peak intensity on August 8
FormedAugust 2, 2021
DissipatedCurrently active
(Extratropical after August 9)
Highest winds10-minute sustained: 85 km/h (50 mph)
1-minute sustained: 95 km/h (60 mph)
Lowest pressure985 hPa (mbar); 29.09 inHg
FatalitiesNone reported
DamageNone
Areas affectedHong Kong, Macau, Guangdong, Taiwan, Ryukyu Islands, Japan
Part of the 2021 Pacific typhoon season

Tropical Storm Lupit, known in the Philippines as Tropical Storm Huaning, was a tropical cyclone that affected Hong Kong and Macau, while also impacted Guangdong and Fujian in Mainland China, Taiwan and Japan and is now over the Sea of Japan. The twelfth depression and ninth named storm of the 2021 Pacific typhoon season, the system was first tracked as a tropical depression by the Japan Meteorological Agency (JMA) as a tropical depression over Zhanjiang. It then moved east-northeastwards, affecting Hong Kong and Macau before strengthening to a tropical storm, whereas it was named Lupit. On August 5, as it neared the coast of Guangdong Province, it slightly intensified before the storm made two consecutive landfills over Nan'ao County in Guangdong and Dongshan County in Fujian on that day.

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

On 06:00 UTC of August 2, the Japan Meteorological Agency started to monitor an east-moving tropical depression over Leizhou, Zhanjiang.[1][nb 1] On the next few hours, it moved into the South China Sea where conditions were conducive for tropical cyclogenesis, with warm 29–30 °C (84–86 °F) sea surface temperatures, low vertical wind shear and equatorial outflow providing on the system. The consolidation of the system's still developing low level circulation center (LLCC), its flaring convection to the southeast and the aforementioned environment prompted the Joint Typhoon Warning Center (JTWC)[nb 2] to issue a Tropical Cyclone Formation Alert on the storm at 13:00 UTC that day.[4] Development further continued as it traversed eastwards and eight hours later, the JTWC upgraded the system to a tropical depression, being assigned the identifier 13W as it further became compact whilst its LLCC became slightly exposed due to shear.[5][6]

Despite the remaining wind shear impacting the system, a near-equatorial ridge to the south guided the depression to a more favorable environment that signified 13W's intensification.[7] As it shifted east-northeast, the system slightly improved during the early hours of August 3, although the depression slowly interacted with the landmass of Macau and Hong Kong, which caused it to slightly degrade. On 21:00 UTC that day, the JTWC reported that 13W further intensified to a tropical storm as infrared satellite imagery revealed a convective banding on the north of the system's circulation; the JMA did the same on the next day, naming the system as Lupit.[8][9][10][11] As the system slowed down by that day, it remained its convective signature as marginal conditions buoyed the system to slowly strengthen while moving north-northwestwards, at that time.[12][13] Its inner core also became well-defined on satellite imagery, being separated from a large spiral banding to the northeast. Continuous wind shear resulted in Lupit becoming assymetric by the early hours of August 5.[14] As it neared the coast of Shantou, its circulation became distinct; however, its convection remained strongest on the south due to wind shear. At 03:20 UTC (11:20 CST), Lupit made landfall over Nan'ao County, Shantou before tracking northeastward inland and weakening slightly to 75 km/h (45 mph) from its initial intensity of 85 km/h (50 mph) upon moving inland due to land interaction.[15][16][17] It followed another landfall at Dongshan County, Fujian at 08:50 UTC (04:50 CST) that day as Lupit's structure rapidly degraded with weakening convection and core structure.[18]

Preparations and impact

Hong Kong, Macau and China

The Hong Kong Observatory and Macao Meteorological and Geophysical Bureau issued tropical cyclone warnings for their respective territories on August 4 due to the threat of strong winds and heavy rainfall.[19][20] Showers and thunderstorms were forecasted by the former due to the storm.[21] Hong Kong and Macau's education bureau also cancelled classes for the kindergartens and schools for children with different disabilities on August 3.[22] 20 mm (0.79 in)-30 mm (1.2 in) of rainfall were reported on that day, while rough waves impacted the territory's shores. An old man was injured on August 2 when a branch from a tree which is 15-meter tall fell on him.[23] As downpour reached as high as 30 mm, the HKO issued an amber rainstorm signal, which was cancelled altogether with the typhoon signals on 10:20 UTC of August 4 (6:20 CST).[24][25]

A blue warning was issued for the mainland China on August 3 due to Lupit.[26] Meanwhile, over 33,000 people in Guangdong were evacuated to safe places while over 3,000 fishing boats and vessels were sheltered and returned to ports.[16] 25,000 individuals from nearby Fujian were forced to leave their homes as the storm neared the province, while 153 boats were called for shelter and 218 scenic spots and ports were closed.[27] A reservoir in Luohu District, Shenzen reported a rain accumulation of 109.6 mm (4.31 in) on August 5, while flooding reached until the chest of individuals on the area and cars being submerged, numerous pictures showed on Weibo that day.[28]

Taiwan

The view of Magong City Wall after Tropical Storm Lupit in August 7

As a precaution, all classes in Yunlin County were halted starting on August 7 due to Lupit.[29] Rockfall alerts were issued by the Council of Agriculture on 7 townships and 23 villages in the country as the storm approached.[30] Its army were also on standby for different emergencies.[31]

Kaohsiung, Chiayi County and the Nantou Mountains all exceeded a rainfall amount of 400.0 mm (15.75 in) on August 7 while Hengchun Peninsula at 800.0 mm (31.50 in) on the next day.[32][33] Pingtung County, meanwhile, collected its highest amount of downpour at 126.0 mm (4.96 in) from the storm. Many reservoirs released their waters due to the rainfall, while flood warnings were also issued on that day.[34] On August 8, Kaohsiung's Mingba Kelu Bridge collapsed as a result of heavy rains, trapping 501 individuals in 3 tribes from an isolated island in Taoyuan District. They were subsequently rescued by authorities that day by a helicopter.[35] In addition, some areas in the city were flooded as a result of downpour, which started on August 5.[36] Namashya District, Taoyuan District and Maolin District were ordered to be closed tomorrow due to the storm while many districts in Taiwan cancelled classes as heavy rains continued to pounded the area.[37][38] Landslides also impacted the Guanming Tunnel in Nantou County, which disrupted traffic.[39]

See also

Notes

  1. ^ The Japan Meteorological Agency is the official Regional Specialized Meteorological Center for the western Pacific Ocean.[2]
  2. ^ 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.[3]

References

  1. ^ "WWJP27 RJTD 020600". Japan Meteorological Agency. August 2, 2021. Archived from the original on August 2, 2021. Retrieved August 6, 2021.
  2. ^ "Annual Report on Activities of the RSMC Tokyo – Typhoon Center 2000" (PDF). Japan Meteorological Agency. February 2001. p. 3. Archived (PDF) from the original on October 31, 2015. Retrieved July 29, 2017.
  3. ^ "Joint Typhoon Warning Center Mission Statement". Joint Typhoon Warning Center. 2011. Archived from the original on July 26, 2007. Retrieved July 25, 2012.
  4. ^ Tropical Cyclone Formation Alert (Invest 90W) (Report). United States Joint Typhoon Warning Center. 2 August 2021. Archived from the original on August 2, 2021. Retrieved 6 August 2021.
  5. ^ Prognostic Reasoning for Tropical Depression 13W (Thirteen) Warning No. 1 (Report). United States Joint Typhoon Warning Center. 2 August 2021. Retrieved 3 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  6. ^ Tropical Depression 13W (Thirteen) Warning No. 1 (Report). United States Joint Typhoon Warning Center. 2 August 2021. Retrieved 3 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  7. ^ Prognostic Reasoning for Tropical Depression 13W (Thirteen) Warning No. 2 (Report). United States Joint Typhoon Warning Center. 3 August 2021. Retrieved 3 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  8. ^ Prognostic Reasoning for Tropical Depression 13W (Thirteen) Warning No. 3 (Report). United States Joint Typhoon Warning Center. 3 August 2021. Retrieved 3 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  9. ^ Tropical Storm 13W (Lupit) Warning No. 5 (Report). United States Joint Typhoon Warning Center. 3 August 2021. Retrieved 3 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  10. ^ Prognostic Reasoning for Tropical Storm 13W (Lupit) Warning No. 5 (Report). United States Joint Typhoon Warning Center. 3 August 2021. Retrieved 3 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  11. ^ "RSMC Tropical Cyclone Prognostic Reasoning No. 5 for TS 2109 Lupit (2106)". Japan Meteorological Agency. August 4, 2021. Archived from the original on August 4, 2021. Retrieved August 9, 2021.
  12. ^ Prognostic Reasoning for Tropical Storm 13W (Lupit) Warning No. 7 (Report). United States Joint Typhoon Warning Center. 4 August 2021. Retrieved 7 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  13. ^ Prognostic Reasoning for Tropical Storm 13W (Lupit) Warning No. 9 (Report). United States Joint Typhoon Warning Center. 4 August 2021. Retrieved 7 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  14. ^ Prognostic Reasoning for Tropical Storm 13W (Lupit) Warning No. 10 (Report). United States Joint Typhoon Warning Center. 5 August 2021. Retrieved 7 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  15. ^ Prognostic Reasoning for Tropical Storm 13W (Lupit) Warning No. 11 (Report). United States Joint Typhoon Warning Center. 5 August 2021. Retrieved 9 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  16. ^ a b "Typhoon Lupit makes landfall in China's Guangdong; over 33,000 evacuated". Times of India. 2021-08-05. Archived from the original on 2021-08-09. Retrieved 2021-08-09.
  17. ^ Prognostic Reasoning for Tropical Storm 13W (Lupit) Warning No. 12 (Report). United States Joint Typhoon Warning Center. 5 August 2021. Retrieved 9 August 2021. {{cite report}}: |archive-url= requires |archive-date= (help)
  18. ^ Prognostic Reasoning for Tropical Storm 13W (Lupit) Warning No. 13 (Report). United States Joint Typhoon Warning Center. 5 August 2021. Archived from the original on August 6, 2021. Retrieved 9 August 2021.
  19. ^ "Tropical Cyclone Warning, 11:45 HKT of 04/August/2021". Hong Kong Observatory. 2021-08-04. Archived from the original on 2021-08-04. Retrieved 2021-08-06.
  20. ^ "Macau hoists storm-warning Signal No 3". Macau Daily. 2021-08-03. Archived from the original on 2021-08-07. Retrieved 2021-08-06. {{cite news}}: |archive-date= / |archive-url= timestamp mismatch; 2021-08-03 suggested (help)
  21. ^ Lam, Eunice (2021-08-03). "Rainy days ahead as bad weather heads our way". The Standard. Archived from the original on 2021-08-09. Retrieved 2021-08-09.
  22. ^ "HK issues typhoon signal No. 3". The Standard. 2021-08-03. Archived from the original on 2021-08-09. Retrieved 2021-08-09.
  23. ^ Chan, Erin (2021-08-03). "Wind and rain to lash city again". The Standard. Archived from the original on 2021-08-09. Retrieved 2021-08-09.
  24. ^ "Amber rainstorm signal in force". The Standard. 2021-08-03. Archived from the original on 2021-08-09. Retrieved 2021-08-09.
  25. ^ "All typhoon signals canceled". The Standard. 2021-08-04. Archived from the original on 2021-08-09. Retrieved 2021-08-09.
  26. ^ Shuqiao, Liu (2021-08-03). "Blue Warning of Typhoon, 03-08-2021". China Meteorological Administration. Archived from the original on 2021-08-09. Retrieved 2021-08-09.
  27. ^ "Rains, gales pummel China's southeastern coastline". Reuters. 2021-08-06. Retrieved 2021-08-09.
  28. ^ "颱風盧碧登陸廣東汕頭 深圳暴雨路面積水阻交通". Central News Agency (in Chinese). 2021-08-05. Archived from the original on 2021-08-10. Retrieved 2021-08-10.
  29. ^ "熱帶性低氣壓影響 雲林縣7日停班停課". Central News Agency (in Chinese). 2021-08-07. Archived from the original on 2021-08-10. Retrieved 2021-08-10.
  30. ^ "颱風盧碧影響 高雄1處大規模崩塌紅色警戒". Central News Agency (in Chinese). 2021-08-06. Archived from the original on 2021-08-10. Retrieved 2021-08-10.
  31. ^ "因應颱風盧碧外圍環流大雨 國軍警戒待命". Central News Agency (in Chinese). 2021-08-05. Retrieved 2021-08-10.
  32. ^ "熱帶性低氣壓持續影響 各地留意局部豪雨". Central News Agency (in Chinese). 2021-08-07. Archived from the original on 2021-08-10. Retrieved 2021-08-10.
  33. ^ "恆春半島3小時降雨近150毫米 多處淹水、道路中斷". Central News Agency. 2021-08-08. Retrieved 2021-08-10.
  34. ^ "14縣市豪大雨來襲 屏東高雄列淹水一二級警戒". Central News Agency (in Chinese). 2021-08-07. Archived from the original on 2021-08-10. Retrieved 2021-08-10.
  35. ^ "高雄桃源區501人受困 黑鷹載300公斤物資投放馳援[影]". Central News Agency (in Chinese). 2021-08-08. Archived from the original on 2021-08-10. Retrieved 2021-08-10.
  36. ^ "颱風盧碧外圍環流大雨 高雄至少6處積淹水". Central News Agency (in Chinese). 2021-08-05. Retrieved 2021-08-10.{{cite news}}: CS1 maint: url-status (link)
  37. ^ "豪雨災情嚴重 高雄3區、屏東3鄉9日停班停課". Central News Agency (in Chinese). 2021-08-08. Archived from the original on 2021-08-10. Retrieved 2021-08-10.
  38. ^ "高雄山區達土石流警戒 茂林等3區6日停班停課". Central News Agency (in Chinese). 2021-08-05. Retrieved 2021-08-10.
  39. ^ "雨灌南投多處邊坡崩落 信義仁愛兩鄉停班停課". Central News Agency (in Chinese). 2021-08-07. Archived from the original on 2021-08-10. Retrieved 2021-08-10.

External links

Wikimedia Commons has media related to Tropical Storm Lupit (2021).

Category:2021 Pacific typhoon season Category:Tropical cyclones in 2021 Category:2021 in Taiwan Category:Typhoons in Taiwan Category:2021 natural disasters Category:Western Pacific tropical storms Category:Typhoons in China Category:2021 in Japan Category:August 2021 events in Asia Category:July 2021 events in Japan Category:Typhoons in Japan

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