Thailand Weather Bureau Issues Ninth Severe Rain Warning
Thailand's Meteorological Department issued its ninth severe rain warning for July 27–30, predicting heavy to very heavy rainfall across northern, northeastern, and southern regions due to monsoon activity. Flash floods and rough seas with
The Meteorological Department issued warning number 9 (136/2569) on July 27, 2026, predicting heavy to very heavy rainfall across multiple areas of Thailand from July 27–30. The rain is driven by a monsoon trough affecting the northern and upper northeastern regions, combined with a strengthening southwest monsoon over the Andaman Sea and Gulf of Thailand.
Public safety authorities warn of dangers from heavy accumulated rainfall that could trigger sudden flash floods and forest runoff, particularly in hillside areas and low-lying zones near waterways. Seas are expected to be rough, with waves 2–3 meters high in the upper Andaman, increasing to over 3 meters in thunderstorm areas. The upper Gulf of Thailand and lower Andaman will see waves around 2 meters, exceeding 2 meters in thunderstorms.
Fishermen in the Andaman Sea and Gulf of Thailand are advised to exercise caution and avoid sailing in thunderstorm areas. Small boats in the upper Andaman should stay ashore during this period. The public is urged to plan activities and travel carefully and monitor updates from the Meteorological Department at www.tmd.go.th, by phone at 0-2399-4012-13, or at 1182, available 24 hours daily. The next warning will be issued on July 28, 2026, at 05:00 a.m.
Affected provinces include: very heavy rain in Trat (July 27) and widespread heavy rainfall across the North (Mae Hong Son, Chiang Rai, Nan, Tak, Phitsanulok, Phetchabun), Northeast (Nong Khai, Bueng Kan, Udon Thani, Sakon Nakhon, Nakhon Phanom, Mukdahan, Yasothon, Amnat Charoen, Si Sa Ket, Ubon Ratchathani), Central (Kanchanaburi, Ratchaburi), East (Chanthaburi), and South (Ranong, Phang Nga) on July 27–29.
