Heavy Rain Warning Issued for 26 Thai Provinces

On August 22, 2569, the Meteorological Department forecasts thunderstorms and heavy rain in some areas across Thailand over the next 24 hours, particularly in the western regions of the northern, central, and eastern zones. A monsoon trough is moving northward across the upper northern region and northern Laos, interacting with a depression near Hainan Island in China. The strengthening southwest monsoon is affecting the Andaman Sea and the Gulf of Thailand. Residents should remain alert for hazards from heavy and accumulated rainfall, which could trigger flash floods, flooding, and overflowing banks, especially in sloping terrain near water channels and low-lying areas. Waves in the upper Andaman Sea are moderately strong, with heights of 2–3 meters; thunderstorm zones may see waves exceeding 3 meters. In the upper Gulf of Thailand, waves are approximately 2 meters, increasing beyond 2 meters in thunderstorm areas. Fishermen throughout the Andaman Sea and Gulf of Thailand should exercise caution, avoid thunderstorm zones, and small boats in the upper Andaman Sea should stay ashore. The depression near Hainan is expected to intensify into a tropical cyclone and move onshore in the southern Guangdong province of China between August 24–25, 2569, but will not directly affect Thailand's weather. Travelers to that region should check conditions before departing.

For the next 24 hours from 06:00 today to 06:00 tomorrow:

Northern Region: Thunderstorms in 60 percent of the area with heavy rain in some places, particularly in Mae Hong Son, Chiang Mai, Chiang Rai, Lampun, Lamphun, Kamphaeng Phet, Phichit, Phetchabun, and Tak provinces. Low 22–26°C, high 31–34°C. Southwest winds 10–20 km/h.

Northeastern Region: Thunderstorms in 40 percent of the area with heavy rain in some places, particularly in Nong Khai, Bueng Kan, and Nakhon Phanom provinces. Low 23–24°C, high 31–33°C. Southwest winds 10–20 km/h.

Central Region: Thunderstorms in 60 percent of the area with heavy rain in some places, particularly in Nakhon Sawan, Uthai Thani, Ratchaburi, and Kanchanaburi provinces. Low 23–25°C, high 32–34°C. Southwest winds 10–25 km/h.

Eastern Region: Thunderstorms in 60 percent of the area with heavy rain in some places, particularly in Nakhon Nayok, Prachuap Khiri Khan, Chanthaburi, and Trat provinces. Low 23–27°C, high 31–33°C. Southwest winds 20–35 km/h. Sea waves approximately 2 meters; higher than 2 meters in thunderstorm zones.

Southern Region (East Coast): Thunderstorms in 30 percent of the area, mainly in Phetchaburi, Prachuap Khiri Khan, Chumphon, and Surat Thani provinces. Low 23–25°C, high 30–37°C. From Surat Thani northward: southwest winds 20–35 km/h; sea waves 1–2 meters nearshore, approximately 2 meters offshore, exceeding 2 meters in thunderstorm zones. From Nakhon Si Thammarat southward: southwest winds 15–35 km/h.