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Severe Tropical Storm Prapiroon (Butchoy)

Tropical Storm Prapiroon at peak intensity, approaching Vietnam on July 22
Meteorological history
Formed	July 19, 2024
Dissipated	July 24, 2024
Severe tropical storm
10-minute sustained (JMA)
Highest winds	110 km/h (70 mph)
Lowest pressure	980 hPa (mbar); 28.94 inHg
Tropical storm
1-minute sustained (SSHWS/JTWC)
Highest winds	110 km/h (70 mph)
Lowest pressure	980 hPa (mbar); 28.94 inHg
Overall effects
Fatalities	15 total
Missing	10
Damage	$412,729 (2024 USD)
Areas affected	Philippines, Vietnam, South China, Thailand
IBTrACS /
Part of the 2024 Pacific typhoon season

Severe Tropical Storm Prapiroon, known in the Philippines as Tropical Depression Butchoy was a compact tropical cyclone that made landfall in Hainan and Vietnam in July 2024. The fourth named storm of the 2024 Pacific typhoon season, the system was first noted by the Joint Typhoon Warning Center (JTWC) as an area of convection east of the Philippines on July 15. After crossing the Philippines and exiting into the South China Sea, the disturbance quickly organized into a tropical depression and was giving the local name Butchoy by the PAGASA on July 19. After exiting PAGASA's area of responsibility on July 21, the depression intensified into a tropical storm and was given the international name Prapiroon by the Japan Meteorological Agency (JMA). The storm crossed the island of Hainan and entered the Gulf of Tonkin, where it intensified into a severe tropical storm on July 22 before making landfall in Quảng Ninh province, Vietnam. Prapiroon rapidly weakened inland as the JTWC issued its final warning the following day, and the JMA downgraded it to a tropical depression.

Meteorological history

On July 15, the JTWC began tracking an area of convection 623 nautical miles (717 mi; 1,154 km) southeast of Manila, Philippines. At the time, the disturbance was in a favorable environment for development, with low vertical wind shear, good equatorward outflow, and warm SSTs. At 06:00 UTC the same day, the JMA designated the system as a low-pressure area. Several days later, the low crossed into the South China Sea. On July 19, the JTWC gave a TCFA to the disturbance, citing a high chance of development within 24 to 48 hours. Shortly after, the JMA designated it as a depression. PAGASA followed suit a few hours later, recognizing the system as a tropical depression and naming it Butchoy. Soon after, the JTWC designated the system as Tropical Depression 04W. However, the next day, Butchoy exited the PAR, causing PAGASA to stop tracking the system. Early on July 21, Butchoy intensified into a tropical storm, being named Prapiroon by the JMA. Later that day, Prapiroon made landfall near Wanning, Hainan with 1-minute sustained winds of 55 kn (65 mph; 100 km/h). Early the next day, Prapiroon intensified into a severe tropical storm. At 6:30 am PT that same day, Prapiroon made its second landfall in Quảng Ninh, Vietnam. Rapidly weakening, early the next day, the JTWC stopped tracking Prapiroon. The system weakened into a tropical depression by the JMA that same day.

Preparations and impact

Philippines

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China and Hong Kong

Prior to its landfall, The China Meteorological Administration, issued typhoon and rain warnings along Hainan and Guangdong. A Level 3 out of 4 emergency response alert was issued in Guangxi, as well as a yellow typhoon alert. About 26,000 visitors on Weizhou Island were evacuated prior to the storm through the use of ferries. High-speed rail and ferry services on the island of Hainan were cancelled. All vessels in Hainan were ordered to return to port and offshore workers were allowed to seek shelter on the island. A flood control team was sent to Hainan in preparation for flooding. A No. 1 Typhoon warning signal was issued by the Hong Kong Observatory for Hong Kong, from the afternoon of July 20 to noon on July 22. As Prapiroon made landfall in Hainan, twelve counties and cities on the island received rainfall in excess of 100 mm (4 in). The highest sustained wind measured on Hainan was 137 km/h (85 mph) in Wanning, where the storm made landfall. High winds were reported in Guangxi, reaching a peak of 89 km/h (55 mph) in Beihai. Torrential rainfall also impacted the province with a maximum accumulation of 38.3 mm (1.5 in) in Donglan County. Rain squalls impacted the Pearl River Delta, where occasional high wind gusts were reported in elevated parts of Hong Kong.

Vietnam

As Prapiroon approached Vietnam, Prime Minister of Vietnam Phạm Minh Chính ordered emergency measures to take place in coastal provinces. Vessels were ordered to return to port or move away from areas within the storm's projected track. Emergency response teams were deployed to protect traffic moving through flood and landslide-prone areas as well as assist in evacuation and recovery efforts. Measures were also taken to prevent dams and reservoirs from overflowing. Heavy rainfall was expected in Northern Vietnam, reaching as high as 300 mm (12 in) in parts of Thanh Hóa province.

Elsewhere

This section needs to be updated. Please help update this article to reflect recent events or newly available information. (July 2024)

In Thailand, the remnants of Prapiroon caused heavy monsoonal rains in some parts of the country. People are advised to be alert for dangers such as flash flooding and landslides. The combination of moisture from Prapiroon and Typhoon Gaemi resulted in severe thunderstorms across Cambodia, which resulted in strong winds, heavy rainfall, and lightning. A large tree fell onto a tuk-tuk in Siem Reap, killing five people and injuring four others. Local authorities cleared the scene of debris and were ordered to control traffic in an effort to prevent further vehicular incidents.

See also

• Weather of 2024
• Tropical cyclones in 2024
• Other storms of the same name
• Tropical Storm Kujira (2015)
• Tropical Storm Sinlaku (2020)
• Tropical Storm Nangka (2020)
• Tropical Storm Lionrock (2021)

References

1. SitRep No. 7 for the Combined Effects of SW Monsoon and TD "Butchoy" (2024) (PDF) (Report). National Disaster Risk Reduction and Management Council. July 20, 2024. Retrieved July 20, 2024.
2. "Heavy rain-triggered flooding, landslides leave 17 dead, missing in North". Saigon Giai Phong News. July 25, 2024. Retrieved July 26, 2024.
3. Significant Tropical Weather Advisory for the Western and South Pacific Oceans, 09Z 15 July 2024 Reissued (Report). United States Joint Typhoon Warning Center. 15 July 2024. Archived from the original on 2024-07-15. Retrieved 15 July 2024.
4. Warning and Summary 150600 (Report). Tokyo, Japan: Japan Meteorological Agency. July 15, 2024. Archived from the original on July 15, 2024. Retrieved July 15, 2024.
5. Significant Tropical Weather Advisory for the Western and South Pacific Oceans, 01Z 19 July 2024 Reissued (Report). United States Joint Typhoon Warning Center. 19 July 2024. Archived from the original on 2024-07-19. Retrieved 19 July 2024.
6. Tropical Cyclone Formation Alert (Invest 91W) (Report). United States Joint Typhoon Warning Center. 19 July 2024. Archived from the original on July 19, 2024. Retrieved 19 July 2024.
7. Warning and Summary 190600 (Report). Tokyo, Japan: Japan Meteorological Agency. July 19, 2024. Archived from the original on June 19, 2024. Retrieved June 19, 2024.
8. "Tropical Cyclone Bulletin #1 for Tropical Depression 'Butchoy' (Butchoy)". PAGASA. 19 July 2024. Archived from the original (PDF) on 19 July 2024. Retrieved 19 July 2024.
9. Tropical Depression 04W (Four) Warning No. 1 (Report). United States Joint Typhoon Warning Center. 19 July 2024. Archived from the original on July 19, 2024. Retrieved 19 July 2024.
10. "Tropical Cyclone Bulletin #3F for Tropical Depression 'Butchoy' (Butchoy)" (PDF). PAGASA. 20 July 2024. Archived from the original (PDF) on 20 July 2024. Retrieved 20 July 2024.
11. "Tropical Cyclone Information : Detail information - T2404 ( PRAPIROON )". Japan Meteorological Agency. Archived from the original on 2024-07-21. Retrieved 2024-07-21.
12. Prognostic Reasoning for Tropical Storm 04W (Prapiroon) Warning No. 9 (Report). United States Joint Typhoon Warning Center. 21 July 2024. Archived from the original on July 21, 2024. Retrieved 21 July 2024.
13. TROPICAL CYCLONE PROGNOSTIC REASONING NO. 12 FOR STS 2404 PRAPIROON (2404) (Report). Tokyo, Japan: Japan Meteorological Agency. July 22, 2024. Archived from the original on July 22, 2024. Retrieved July 22, 2024.
14. "Storm Prapiroon hits Quang Ninh in northern Vietnam". VNExpress. 22 July 2024.
15. Tropical Storm 04W (Prapiroon) Warning No. 14 (Report). United States Joint Typhoon Warning Center. 23 July 2024. Archived from the original on July 23, 2024. Retrieved 23 July 2024.
16. TROPICAL CYCLONE PROGNOSTIC REASONING NO. 18 FOR TD 2404 PRAPIROON (2404) (Report). Tokyo, Japan: Japan Meteorological Agency. July 23, 2024. Archived from the original on July 23, 2024. Retrieved July 23, 2024.
17. "China braces itself for twin tropical cyclones after deadly flash floods". Asia One. July 22, 2024. Retrieved July 26, 2024.
18. ^ "Typhoon Prapiroon brings rainstorms, strong gusts to south China". Xinhua. July 22, 2024. Retrieved July 26, 2024.
19. "26,000 tourists evacuated as Typhoon Prapiroon nears south China". Xinhua. July 21, 2024. Retrieved July 26, 2024.
20. "China sends work team as Typhoon Prapiroon to make landfall". Xinhua. July 21, 2024. Retrieved July 26, 2024.
21. Emily Hung; Jeffie Lam (July 21, 2024). "Hong Kong Observatory says T1 typhoon signal in force until at least Monday noon". South China Morning Post. Retrieved July 26, 2024.
22. "Typhoon Prapiroon brings rainstorms, strong gusts to South China". Xinhua. China Daily. July 22, 2024. Retrieved July 26, 2024.
23. "T1 signal to remain in force until midnight". The Standard. July 21, 2024. Retrieved July 26, 2024.
24. "Vietnam prepares for impact of Typhoon Prapiroon and potential flooding". VietnamNet. July 22, 2024. Retrieved July 25, 2024.
25. Bảo Anh (July 22, 2024). "Bão số 2 đang giật cấp 13 ở Vịnh Bắc Bộ, miền Bắc mưa lớn dồn dập từ đêm nay". VietnamNet. Retrieved July 25, 2024.
26. "Tropical Storm 'Prapiroon' causing heavy rainfall in some parts of Thailand". Pattaya Mail. July 24, 2024. Retrieved July 26, 2024.
27. "Severe weather causes fatal Tuk-Tuk accident in Siem Reap (VIDEO)". Khmer Times. July 24, 2024. Retrieved July 26, 2024.

External links

• Pending AfC submissions
• Pending AfC submissions in article space