TMD Warns of Heavy Rain in 9 Southern Provinces, Cold North
The Thai Meteorological Department has issued a heavy rain warning for nine southern provinces, urging residents to watch for flash floods and forest runoff. Meanwhile, a cold front from China is bringing cooler temperatures and strong winds to upper Thailand, with temperatures dropping 1-2 degrees Celsius. The Andaman Sea and Gulf of Thailand are experiencing high waves of 2-3 meters, and small boats are advised to remain in port.
The Thai Meteorological Department (TMD) reports that upper Thailand will see cool weather with strong winds and temperatures dropping by 2 degrees Celsius. Nine southern provinces are named under a heavy rain warning with risks of flash floods and forest runoff on November 11, 2026. The 24-hour forecast calls for heavy rain in parts of the South, urging residents to beware of thunderstorms and accumulated rainfall that could trigger sudden flooding, especially in foothill areas near waterways. Upper Thailand faces cool, windy conditions, though the upper North may see thunderstorms and strong gusts. People in the North are advised to protect their health from the cold, while farmers should safeguard crops against wind damage. The pattern is driven by a strong high-pressure system from China spreading over upper Thailand and the South China Sea, combined with westerly winds crossing Myanmar and the North, while a moderate northeast monsoon blankets the Gulf of Thailand, the South, and the Andaman Sea. Seas are roughening: the lower Gulf faces 2-3 meter waves, exceeding 3 meters in thunderstorms. Mariners should exercise caution, avoid storm areas, and small boats in the lower Gulf should stay in port.
The TMD forecast for Thailand from 06:00 today to 06:00 tomorrow:
North: Cool mornings with strong winds; temperatures falling 1-2°C. Isolated thunderstorms (20% of area) and strong gusts, mainly in Mae Hong Son, Chiang Mai, and Chiang Rai. Low 17-23°C, high 24-33°C. Hilltops cold at 9-15°C. Easterly winds 10-30 km/h.
Northeast: Cool mornings with strong winds; light rain in lower areas. Low 16-19°C, high 27-32°C. Hilltops cold at 10-14°C. Northeasterly winds 15-30 km/h.
Central: Cool mornings with strong winds; light rain in places. Low 21-23°C, high 31-33°C. Northeasterly winds 10-30 km/h.
East: Cool mornings with strong winds; light rain in places. Low 20-23°C, high 31-33°C. Northeasterly winds 15-30 km/h. Waves about 1 meter, over 1 meter offshore.
South (east coast): Thunderstorms covering 60% of area with heavy rain in Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, and Songkhla. Low 22-24°C, high 28-32°C. From Surat Thani north: northeasterly winds 15-35 km/h, waves 1-2 meters, over 2 meters in storms. From Nakhon Si Thammarat south: easterly winds 20-40 km/h, waves 2-3 meters, over 3 meters in storms.
South (west coast): Thunderstorms covering 40% of area, mainly in Ranong, Phang Nga, Trang, and Satun.
