TMD Issues Heavy Rain Alert for Southern Provinces
The Thai Meteorological Department has issued Alert No. 7 warning of heavy to very heavy rain across Southern Thailand from November 11-13, with risks of flash floods and landslides. Waves in the Gulf of Thailand and Andaman Sea will reach 2-3 meters, exceeding 3 meters in storms, prompting warnings for mariners and small boats to stay ashore. A strong cold front from China is also bringing cooler temperatures and strong winds nationwide, with thunderstorms in the upper North.
The Thai Meteorological Department forecasts heavy rain and colder temperatures nationwide tomorrow, with temperatures dropping in the North and South. Alert No. 7 warns of heavy to very heavy rainfall in Southern Thailand from November 11-13, 2026, urging the public to watch for flash floods and landslides, especially in foothill and low-lying areas. Waves in the Andaman Sea and Gulf of Thailand will strengthen to 2-3 meters in the lower Gulf, exceeding 3 meters in thunderstorms. Mariners should exercise caution and small boats in the lower Gulf should remain ashore. A strong cold air mass from China is driving the cooler weather and strong winds across Thailand, with thunderstorms and gusts expected in the upper North. Residents are advised to protect their health and farmers to safeguard crops.
The department details that the high-pressure system from China covers upper Thailand and the South China Sea, while westerly winds move through Myanmar and Northern Thailand. The moderate northeast monsoon prevails over the Gulf, South, and Andaman Sea. For safety, the public should plan activities and travel carefully, monitor TMD announcements continuously via https://tmd.go.th or hotlines 0-2399-4012-13 and 1182 (24 hours). The next alert will be issued November 12, 2026 at 05:00.
Provinces expected to be affected:
November 11, 2026 - Heavy rain: Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla.
November 12, 2026 - Very heavy rain: Chumphon, Surat Thani, Nakhon Si Thammarat. Heavy rain: Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phuket, Krabi, Trang, Satun.
November 13, 2026 - Very heavy rain: Surat Thani, Nakhon Si Thammarat. Heavy rain: Phetchaburi, Prachuap Khiri Khan, Chumphon, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phang Nga, Krabi, Trang, Satun.
General Thailand forecast for 18:00 today to 18:00 tomorrow:
North: Cool morning with strong winds, temperatures dropping 1-2°C. Thunderstorms covering 40% of the area, mainly Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan. Low 16-23°C, high 23-31°C. Mountain tops cold at 9-15°C. Northwesterly winds.
