TMD Warns of Heavy Rain, Flash Floods in 16 Provinces
The Thai Meteorological Department has issued its 11th heavy rain warning covering October 22-25, forecasting continuous heavy to very heavy rain across 16 provinces in the Eastern and Southern regions. Authorities warn of flash floods, mudslakes, and waves over three meters in the Andaman Sea and Gulf of Thailand, urging residents and mariners to take precautions and monitor official updates.
The Thai Meteorological Department issued Warning No. 11 for heavy to very heavy rain from October 22-25, 2026 (effective until October 25). During this period, the Eastern and Southern regions will have continuous rain with heavy to very heavy falls in some areas. The lower North, lower Northeast, Central region, and Bangkok metropolitan area will continue to see thundershowers with strong gusts in places. The public in these areas should beware of dangers from strong gusts, heavy to very heavy rain, and accumulated rainfall that could trigger flash floods and mudslides in foothill and watershed areas. This is caused by a monsoon trough passing through the central South combined with the southwest monsoon covering the lower Andaman Sea, while a high-pressure system or cold air mass from China extends over the upper North, upper Northeast, and South China Sea, driving easterly winds across Thailand and the Gulf. In the Andaman Sea and Gulf of Thailand, waves will exceed three meters in thundershower areas. Mariners in the Gulf and Andaman should navigate with caution and avoid thundershower areas. For safety, the public is advised to plan travel carefully and monitor TMD announcements continuously via www.tmd.go.th or hotlines 0-2399-4012-13 and 1182, available 24 hours. General forecast for October 22, 2026: Eastern and Southern regions have continuous rain with heavy falls in some areas; upper Thailand has thundershowers and strong gusts. Southern residents should beware of heavy rain, strong gusts, and accumulated rainfall that may cause flash floods and mudslides. In the Andaman Sea and Gulf, waves will exceed two meters in thundershower areas; mariners should navigate cautiously and avoid thundershowers. Detailed 24-hour regional forecasts follow, covering the North, Northeast, Central, East, South, and marine conditions.
