Typhoon Tapah (2025)

This article is about the 2025 typhoon. For other storms of the same name, see List of storms named Tapah and List of storms named Lannie.

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

Tropical cyclone

Subtropical cyclone

Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

On September 4, the JTWC began monitoring an area of low pressure west-southwest of Vigan, Ilocos Sur, noting favorable conditions for tropical cyclogenesis despite a poorly defined low-level circulation center (LLCC). ^[2] The following day, the National Center for Hydro-Meteorological Forecasting (NCHMF) of Vietnam issued its first bulletin at 21:00 ICT (14:00 UTC), reporting the formation of a tropical depression over the South China Sea. ^{[3] [ failed verification ]} At 02:00 PHT on September 6 (18:00 UTC), PAGASA classified the system as a tropical depression and assigned it the local name Lannie. ^[4] Later that day, the JTWC issued a Tropical Cyclone Formation Alert (TCFA), citing a high likelihood of further development, ^[5] and around 09:00 UTC, it upgraded the system to a tropical depression with the designation 22W. ^[6] At 21:00 JST (12:00 UTC), the JMA upgraded the system to a tropical storm,^{[ citation needed ]} assigning it the international name Tapah; the JTWC did the same three hours later. ^[7] Satellite imagery showed Tapah with a partially exposed LLCC with deep convection consolidating near the center as it moved northwestward. ^[8] Early on September 8, the JMA upgraded Tapah to a severe tropical storm before^{[ citation needed ]} it made landfall on Xiachuan Island in the Chuanshan Archipelago of Guangdong, China at 07:00 CST (23:00 UTC). Shortly afterwards, the storm rapidly intensified into a Category 1-equivalent typhoon on the Saffir–Simpson scale with one-minute maximum sustained winds of 120 km/h (75 mph), making a second landfall over Taishan, Guangdong at 08:00 CST (00:00 UTC). ^[9] By 11:00 HKT on September 9, the Hong Kong Observatory (HKO) had downgraded Tapah to a low-pressure area over inland Guangxi, ^{[10] [11]} where it was last noted approximately 70 km (43 miles; 38 nautical miles) west-southwest of Guilin. ^[12]

Preparations

Philippines

PAGASA raised the yellow rainfall warning over four provinces on the island of Luzon on September 5. ^{[13] [14]}

Hong Kong and Macau

The HKO issued Standby Signal No. 1 ^[a] at 22:20 HKT (14:20 UTC) on September 5. ^[15] The same signal was also hoisted by the Macau Meteorological and Geophysical Bureau (SMG) ^[b] on the following day at 00:30 MST (16:30 UTC). ^{[16] [17] [18]} The signal was later upgraded to the Strong Wind Signal No. 3 at 02:40 HKT (18:40 UTC) on September 7; ^[19] the SMG hoisted the same signal at 08:00 MST (00:00 UTC) ^{[20] [21]} on the same day.

Gale or Storm Northeast Signal No. 8 was hoisted at 21:00 MST on September 7 in Macau ^{[22] [23] [24]} and was expected to remain in effect until at least 10:00 MST on the following day. ^[25] The Education and Youth Development Bureau (DSEDJ) ^[c] announced on September 7 that classes would be suspended on September 8. ^[26] A yellow storm surge warning was also issued, ^{[27] [28] [29]} and the government declared a state of immediate prevention. ^{[30] [31]} Meanwhile, in Hong Kong, Gale or Storm Southeast Signal No. 8 was issued instead at 21:20 HKT, ^{[32] [33] [34]} followed by the amber rainstorm signal at 04:55 HKT on September 8 (20:55 UTC). The HKO also warned of possible storm surges, ^[35] and classes were suspended for September 8. ^[33] At 05:00 MST, the SMG replaced Northeast Signal No. 8 with Southeast Signal No. 8. ^{[36] [37]}

The HKO downgraded Southeast Signal No. 8 to Signal No. 3 at 13:10 HKT, ^{[38] [39]} while the same thing was done in Macau at 15:00 MST. ^[40]

Elsewhere

In Guangdong Province, China, classes were suspended in Yangjiang, Yunfu and Zhuhai, and parts of Zhanjiang, Jiangmen, and Maoming. The orange typhoon alert was issued for portions of Yangjiang. ^[41] Railway services between Shenzhen and Zhanjiang and between Guangzhou and Maoming were also suspended. ^[42]

In Vietnam, warnings were issued as the Ministry of Agriculture and Environment instructed the People's Committees of northern mountainous provinces to closely monitor forecasts and warnings of heavy rainfall and the associated risks of floods, flash floods, and landslides. The ministry also called on provinces to ensure the safety of dykes and reservoirs. ^[43]

Impact

Philippines

Along with the southwest monsoon, ^[d] Tapah (known locally as Lannie) brought torrential rain and flooding to Metro Manila in the afternoon of September 6. ^[44]

Hong Kong and Macau

In Hong Kong, three people were treated at accident and emergency (A&E) units of public hospitals, while 219 others sought refuge in shelters. Authorities received 104 reports of fallen trees. Ferry operations and most bus routes across the territory were suspended. ^{[35] [38]} Across both territories minor flooding from storm surge was observed on September 8 in low-lying areas, including Tai O on Lantau Island, Sam Ka Tsuen  [ yue ] in New Kowloon, ^[45] and Porto Interior on the Macau Peninsula. ^[46] At Chek Lap Kok International Airport, about 100 flights were expected to be canceled. ^[47] Additionally, an HK Express Airbus A320 operating flight UO235 struck an airport sign while landing on Runway 07L (the north runway) at 10:36 HKT on September 8; no injuries were reported. ^[48]

See also

• Tropical cyclones portal
• China portal
• Hong Kong portal

• Weather of 2025
• Tropical cyclones in 2025
• Typhoon Chaba (2022)
• Tropical Storm Pakhar (2017)

Notes

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

1. This signal is hoisted when a tropical system is within 800 km (430 nmi; 500 mi) of Hong Kong or Macau and is expected to affect the respective territory.
2. Portuguese: Direcção dos Serviços Meteorológicos e Geofísicos
3. Portuguese: Direcção dos Serviços de Educação e de Desenvolvimento da Juventude
4. Tagalog: Habagat

References

1. "Joint Typhoon Warning Center Mission Statement". Joint Typhoon Warning Center. 2011. Archived from the original on July 26, 2007. Retrieved July 25, 2012.
2. Significant Tropical Weather Advisory for the Western and South Pacific Oceans, 01Z 5 September 2025 (Report). United States Joint Typhoon Warning Center. September 5, 2025. Retrieved September 5, 2025.
3. "Áp thấp nhiệt đới xuất hiện trên Biển Đông, mạnh thành bão số 7 trong 24 giờ tới". Vietnam.net (in Vietnamese). September 5, 2025. Retrieved September 5, 2025.
4. "LPA west of Luzon becomes Tropical Depression Lannie". Philippine Daily Inquirer . September 6, 2025. Retrieved September 6, 2025.
5. Tropical Cyclone Formation Alert (Invest 97W) (Report). Joint Typhoon Warning Center. September 6, 2025. Retrieved September 6, 2025.
6. Prognostic Reasoning for Tropical Depression 22W (Twenty-two) (Report). Joint Typhoon Warning Center. September 6, 2025. Retrieved September 6, 2025.
7. Prognostic Reasoning for Tropical Storm 22W (Tapah) No. 2 (Report). Joint Typhoon Warning Center. September 6, 2025. Retrieved September 7, 2025.
8. Prognostic Reasoning for Tropical Storm 22W (Tapah) No. 5 (Report). Joint Typhoon Warning Center. September 7, 2025. Retrieved September 7, 2025.
9. Typhoon (Tapah) Warning No. 8 (Report). Joint Typhoon Warning Center. September 8, 2025. Retrieved September 8, 2025.
10. "Tropical Cyclone Position". Hong Kong Observatory. September 8, 2025. Retrieved September 8, 2025.
11. "Local weather forecast". Hong Kong Observatory. September 8, 2025. Retrieved September 8, 2025.
12. "Local weather forecast". Hong Kong Observatory. September 8, 2025. Retrieved September 8, 2025.
13. "LPA west of Ilocos Sur now Tropical Depression Lannie | GMA News Online".
14. "PAGASA raises yellow rainfall warning over 4 Luzon provinces | GMA News Online".
15. "Observatory issues T1, ponders need for higher signal". RTHK . September 5, 2025. Retrieved September 5, 2025.
16. "Clima em Macau – Direcção dos Serviços Meteorológicos e Geofísicos". September 5, 2025. Retrieved September 5, 2025.
17. "The weather bureau reports a low-pressure system near the central South China Sea is expected to develop into a tropical cyclone by 6th September". TDM Canal Macau. September 5, 2025. Retrieved September 5, 2025.
18. "Sinal 1 de tempestade tropical está em vigor – O sinal número 1 de tempestade tropical está em vigor desde as 00h30 devido à influência de uma depressão tropical que se localiza a menos de 800 km de Macau". Teledifusão de Macau. September 6, 2025. Retrieved September 6, 2025.
19. "T3 signal to be in force for most of Sunday". Archived from the original on September 6, 2025. Retrieved September 6, 2025.
20. "Clima em Macau – Direção dos Serviços Meteorológicos e Geofísicos" . Retrieved September 6, 2025.
21. "早上8時改發3號風球" . Retrieved September 6, 2025.
22. "Içado Sinal 8 de tempestade tropical". Teledifusão de Macau. September 7, 2025. Retrieved September 7, 2025.
23. "Clima em Macau – Direção dos Serviços Meteorológicos e Geofísicos" . Retrieved September 7, 2025.
24. "Clima em Macau – Direção dos Serviços Meteorológicos e Geofísicos" . Retrieved September 7, 2025.
25. "SMG: Sinal 8 deve continuar em vigor pelo menos até às 10h00 da manhã de Segunda-feira". Teledifusão de Macau. September 7, 2025. Retrieved September 7, 2025.
26. "DSEDJ: Aulas do Ensino Não Superior suspensas esta Segunda-feira". Teledifusão de Macau. September 7, 2025. Retrieved September 7, 2025.
27. "Macau eleva nível de alerta devido à proximidade do tufão Tapah".
28. "A typhoon signal no. 8 will be raised in Macao tonight".
29. "Yellow storm surge warning issued". Teledifusão de Macau. September 7, 2025. Retrieved September 7, 2025.
30. "Declarado estado de prevenção imediata". Teledifusão de Macau. September 7, 2025. Retrieved September 7, 2025.
31. "Declaração do início do estado de prevenção imediata".
32. "T8 to be issued at 9.20 pm – RTHK". RTHK. September 8, 2025. Retrieved September 8, 2025.
33. "T8 in effect but higher signals not likely, says HKO – RTHK".
34. "T8 signal hoisted, remain in force until 11 am on Mon: HKO". The Standard. September 8, 2025. Retrieved September 8, 2025.
35. "Hong Kong hunkers down as Tapah skirts past". RTHK. September 8, 2025. Retrieved September 8, 2025.
36. ""塔巴"距澳140公里清晨5時改8號東南風球". Teledifusão de Macau. September 8, 2025. Retrieved September 8, 2025.
37. "Current Typhoon Signals". September 8, 2025. Archived from the original on September 8, 2025. Retrieved September 8, 2025.
38. "T3 at 1.10 pm, transport gradually resumes". RTHK. September 8, 2025. Retrieved September 8, 2025.
39. "Back to office for workers as Tapah moves away". RTHK. September 8, 2025. Retrieved September 8, 2025.
40. "Emitido sinal 3 de tempestade tropical". Teledifusão de Macau. September 8, 2025. Retrieved September 8, 2025.
41. "颱風塔巴|廣東26地黃色預警 深圳珠海多市停課 嚴重風雨將至9日" [Typhoon Tapah | Yellow Alerts Issued in 26 Areas of Guangdong; Classes Suspended in Shenzhen, Zhuhai, and Other Cities; Severe Wind and Rain Expected on the 9th]. HK01 . September 7, 2025. Retrieved September 11, 2025.
42. "廣東多地升級預警信號 江門及珠海等地發布停課通知 - RTHK" [Guangdong Upgrades Warning Signals; Class Suspensions Issued in Jiangmen, Zhuhai, and Other Areas]. RTHK . September 8, 2025. Retrieved September 8, 2025.
43. "Bão Tapah vào Trung Quốc nhưng gây mưa lớn ở Việt Nam".
44. Cruzat, Jessie. "Thunderstorms in Metro Manila leave students, commuters stranded". ABS-CBN News.
45. "塔巴｜適逢天文大潮大澳水漲船高、內街倒灌三家村商戶：大風過十號". Cable News. September 8, 2025. Retrieved September 8, 2025.
46. "風暴塔巴｜澳門八號風球料上午維持 內港一帶水浸". TVB. September 8, 2025. Retrieved September 8, 2025.
47. "Tapah forces flight cancellations and delays". RTHK. September 8, 2025. Retrieved September 8, 2025.
48. "No injuries as HK Express plane hits runway signage". RTHK. September 8, 2025. Retrieved September 8, 2025.

Typhoon Tapah (Lannie)

Tapah approaching the Chuanshan Archipelago, China at its near peak intensity on September 8

v t e Tropical cyclones of the 2025 Pacific typhoon season
	TD TD STS Wutip TD Auring TS Sepat TD 03W TS Mun TY Danas STS Nari TD 07W TS 08W STS Wipha TS Francisco TY Co-may TY Krosa TS Bailu TD TD TD Iona TD 14W TD 15W TY Podul TD Fabian TD 17W TS Lingling TY Kajiki TS Nongfa TS Peipah TY Tapah TD Mirasol
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