Thai Meteorological Department Issues Second Warning for Heavy to Very Heavy Rainfall; 44 Provinces Affected, Bangkok at 60% Risk
Thailand's Meteorological Department issued a second heavy rainfall warning affecting 44 provinces from May 14-18, with very heavy downpours expected to cause flash flooding in foothill and low-lying areas, particularly in the north and sou
On May 13, 2025, the Thai Meteorological Department issued its second warning (No. 62/2569) regarding heavy to very heavy rainfall and strong winds in the Andaman Sea, effective from May 14-18, 2025. During this period, rainfall will increase across northern, central, eastern, and southern Thailand, with some areas experiencing very heavy downpours that may cause flash flooding and flash floods, particularly in foothill areas and low-lying zones near waterways.
The severe weather is caused by a strengthening low-pressure system moving from the lower to upper Bay of Bengal, combined with an intensifying southwest monsoon across the Andaman Sea, Thailand, and the Gulf of Thailand. Sea conditions will deteriorate significantly, with the Andaman Sea experiencing 2-3 meter waves, exceeding 3 meters in thunderstorm areas. The upper Gulf of Thailand will see approximately 2-meter waves, exceeding 2 meters during thunderstorms.
The public is advised to be cautious of heavy rainfall and accumulated water that could cause flooding. Fishermen should exercise extreme caution and avoid sailing in thunderstorm areas. Small boats in the Andaman Sea should remain ashore during this period. The public is encouraged to monitor updates from the Thai Meteorological Department via their website (tmd.go.th) or by calling 0-2399-4012-13 and 1182, available 24/7.
Provincial Impact Areas:
May 14: Heavy rainfall expected in Mae Hong Son, Chiang Mai, Chiang Rai, Nan, Phitsanulok, Phetchabun, Tak (north); Loei (northeast); Kanchanaburi, Ratchaburi (central); Nakhon Nayok, Prachuap Khiri Khan, Chanthaburi, Trat (east); and Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phang Nga, Krabi, Trang, Satun (south).
May 15: Very heavy rainfall in Tak, Kanchanaburi, and Phetchaburi. Heavy rainfall in Mae Hong Son, Chiang Mai, Lamphun, Lampang, Phayao, Nan, Phrae, Uttaradit, Kamphaeng Phet, Phitsanulok, Phetchabun (north); Loei, Nong Khai, Bueng Kan, Sakon Nakhon, Nakhon Phanom, Chaiyaphum, Mukdahan, Amnat Charoen, Sisaket, Ubon Ratchathani (northeast); Nakhon Sawan, Uthai Thani, Ratchaburi (central); Rayong, Chanthaburi, Trat (east); and Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Trang, Satun, Ranong, Phang Nga, Phuket, Krabi (south).
May 16: Very heavy rainfall in Tak and Kanchanaburi. Heavy rainfall in Mae Hong Son, Chiang Mai, Tak, Kamphaeng Phet (north); Nong Khai, Bueng Kan, Udon Thani, Sakon Nakhon (northeast).
