Weather Advisory
Subject: Storm “WIPHA” and heavy to very heavy rain in Thailand
No.10 (196/2025)
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At 04.00 a.m. LST (22 July 2025), severe tropical storm “WIPHA” over the Gulf of Tonkin was centered about 50 kilometers northeast of Thai Binh, Vietnam or at latitude 20.5 degrees north and longitude 107.1 degrees east with maximum sustained winds about 100 km./hr. This storm is moving west-southwest with a speed of 15 km/hr., forecast to make landfall at Thai Binh, Vietnam by today (22 July 2025) before downgrading to tropical depression and the low-pressure cell, respectively. It is likely to move along the monsoon through lying upper Laos and the upper North. Meanwhile the strong southwest monsoon prevails across the Andaman Sea, Thailand and the Gulf.
The effects of storm “WIPHA” are impacts of heavy to very heavy rain and strong wind in the North, the upper Northeast, western Central and the East during 22-24 July 2025. People in the country should beware of heavy to very heavy rain and accumulation that may cause flash floods and overflows especially along the waterways near foothills and lowlands.
Affected areas are as followings
22 July 2025
North: Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Uttaradit, Sukhothai, Tak, Kamphaeng Phet, Phichit, Phitsanulok, and Phetchabun.
Northeast: Loei, Nong Khai, Bueng Kan, Nong Bua Lam Phu, Udon Thani, Sakon Nakhon, Nakhon Phanom, Chaiyaphum, Khon Kaen, Kalasin, and Mukdahan.
Central: Nakhon Sawan, Uthai Thani, Chai Nat, Sing Buri, Ang Thong, Lopburi, Suphan Buri, Kanchanaburi, and Ratchaburi
East: Nakhon Nayok, Prachin Buri, Chanthaburi, and Trat
South: Phetchaburi and Prachuap Khiri Khan.
23 July 2025
North: Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Uttaradit, Sukhothai, Tak, Kamphaeng Phet, Phichit, Phitsanulok, and Phetchabun
Northeast: Loei, Nong Khai, Bueng Kan, Nong Bua Lam Phu, Udon Thani, Sakon Nakhon, Nakhon Phanom, Mukdahan, Nakhon Ratchasima, and Ubon Ratchathani
Central: Nakhon Sawan, Uthai Thani, Chai Nat, Sing Buri, Ang Thong, Suphan Buri, Kanchanaburi, and Ratchaburi
East: Nakhon Nayok, Prachin Buri, Sa Kaeo, Chanthaburi, and Trat
South: Phetchaburi and Prachuap Khiri Khan
24 July 2025
North: Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Uttaradit, Sukhothai, Tak, Kamphaeng Phet, Phichit, Phitsanulok, and Phetchabun
Northeast: Loei, Nong Khai, Bueng Kan, Udon Thani, Sakon Nakhon, Nakhon Phanom, Mukdahan, Amnat Charoen, and Ubon Ratchathani
Central: Nakhon Sawan, Uthai Thani, Kanchanaburi, and Ratchaburi
East: Nakhon Nayok, Prachin Buri, Chanthaburi, and Trat
South: Phetchaburi and Prachuap Khiri Khan
The rather strong wind forces the waves in the Andaman Sea and the upper Gulf up to 2-4 meters high and above 4 meters high in thundershowers. All ships in the Andaman Sea and the Gulf should proceed with caution and keep off thundershowers, small boats in the Andaman Sea and the upper Gulf should keep ashore during this period.
This advisory is in effect on 22 July 2025, at 5.00 a.m.
This next issue will be on 22 July 2025, at 11.00 a.m.
(Signed) Sugunyanee Yavinchan
(Miss Sugunyanee Yavinchan)
Director-General
Thai Meteorological Department
