Heavy to very heavy rain is expected for all parts of the country this week, with flash flood and watercourse overflow warnings for communities near foothills and on low land.
The Thai Meteorological Department said in its 5am weather forecast on Monday that this is caused by an active monsoon trough across the lower North, the upper Central and the Northeast interacting with the strong southwest monsoon across the Andaman Sea, the whole of Thailand and the Gulf of Thailand.
More rain is likely all over the country from Sept 5-9, with heavy to very heavy rain in some parts of the North, Northeast, Central including Bangkok and vicinity, East and South regions.
Provinces to be affected on Sept 5 are:
• Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Sukhothai, Uttaradit, Kamphaeng Phet, Phichit, Phitsanulok and Phetchabun in the North;
• Loei, Nong Bua Lamphu, Nong Khai, Bung Kan, Udon Thani, Sakon Nakhon, Nakhon Phanom, Chaiyaphum, Khon Kaen, Kalasin, Mukdahan, Maha Sarakham, Roi Et, Yasothon, Amnat Charoen, Nahon Ratchasima, Buri Ram, Surin, Si Sa Ket and Ubon Ratchathani in the Northeast;
• Nakhon Sawan, Chainat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Lopburi, Saraburi, Suphan Buri, Nakhon Pathom, Samut Sakhon and Bangkok in the Central;
• Nakhon Nayok, Prachinburi, Sa Kaeo, Chachoengsao, Chonburi, Rayong, Chanthaburi and Trat in the East; and
• Prachuap Khiri Khan, Chumphon, Surat Thani, Ranong, Phang Nga, Phuket, Krabi and Trang in the South.
To be affected on Sept 6-7 are:
• Mae Hong Son, Chiang Mai, Lamphun, Lampang, Phrae, Sukhothai, Uttaradit, Tak, Kamphaeng Phet, Phichit, Phitsanulok and Phetchabun in the North;
• Loei, Nong Bua Lamphu, Nong Khai, Udon Thani, Chaiyaphum, Khon Kaen, Kalasin, Mukdahan, Maha Sarakham, Roi Et, Yasothon, Amnat Charoen, Nakhon Ratchasima, Buriram, Surin, Sisaket and Ubon Ratchathani in the Northeast;
• Nakhon Sawan, Uthai Thani, Chainat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Lopburi, Saraburi, Kanchanaburi, Suphan Buri, Ratchaburi, Nakhon Pathom, Samut Songkhram, Samut Sakhon and Bangkok in the Central;
• Nakhon Nayok, Prachinburi, Sa Kaeo, Chachoengsao, Chonburi, Rayong, Chanthaburi and Trat in the East; and
• Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Ranong, Phangnga, Phuket, Krabi and Trang in the South.
To be affected on Sept 8-9 are:
• Mae Hong Son, Chiang Mai, Lamphun, Lampang, Nan, Phrae, Sukhothai, Uttaradit, Tak, Kamphaeng Phet, Phichit, Phitsanulok and Phetchabun in the North;
• Loei, Nong Bua Lamphu, Nong Khai, Udon Thani, Chaiyaphum, Khon Kaen, Maha Sarakham, Roi Et, Nakhon Ratchasima, Buriram, Surin, Sisaket and Ubon Ratchathani in the Northeast;
• Nakhon Sawan, Uthai Thani, Chainat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Lopburi, Saraburi, Kanchanaburi, Suphan Buri, Ratchaburi, Nakhon Pathom, Samut Songkhram, Samut Sakhon and Bangkok in the Central;
• Nakhon Nayok, Prachinburi, Sa Kaeo, Chachoengsao, Chonburi, Rayong, Chanthaburi and Trat in the East; and
• Phetchaburi, Prachuap Khiri Khan, Chumphon, Ranong, Phang Nga and Phuket in the South.
During the same period, waves are expected to be 2-3 metres high in the upper Andaman Sea and the upper Gulf of Thailand, and more than 3m high in areas with thundershowers. Waves in the lower Andaman Sea are expected to be about 2m high and more than 2m high in areas with thundershowers. All vessels are advised to proceed with caution and small boats should stay ashore.
