Weather Advisory
Subject: Tropical Depression
and heavy to very heavy rain in Thailand
No. 2 (225/2025)
------------------------
At 4.00 p.m.
LST (29 August 2025), tropical depression over the middle of South China, the
center of the storm was located at latitude 16.5 degrees north and longitude
112.0 degrees east, with maximum sustained winds near the center at about 55
km/h. The storm is moving west-northwest with a speed of 20 km/hr. and it is
expected to intensify into a tropical storm before making landfall in northern
Vietnam by the evening of 30 August. Afterward, it is forecasted to weaken into
a depression and move over northern Laos, and later weaken further into a
strong low-pressure area, moving along the monsoon trough into Thailand’s
northeastern region on the night of 30 August, and northern of Thailand by 31
August.
This system will bring
increased rainfall across Thailand from 30 August - 1 September, with heavy to
very heavy rainfall in many areas, accompanied by strong winds in the
northeastern region, particularly in the provinces of Nakhon Phanom, Sakon
Nakhon, Mukdahan, Bung Kan, Nong Khai, Loei, Udon Thani, Nong Bua Lam Phu,
Kalasin, Khon Kaen, and Chaiyaphum. The northern and upper-central regions will
be affected by 31 August, especially in the lower provinces of Nan, Phrae,
Uttaradit, Phetchabun, Phitsanulok, Phichit, Sukhothai, Tak, Kamphaeng Phet,
Chiang Mai, Lampang, Lamphun, Mae Hong Son, and Nakhon Sawan. People in the
country should beware of heavy to very heavy rain, strong wind and accumulation
that may cause flash floods and overflows especially along the waterways near
foothills and
lowlands.
Affected areas
are as followings
30 August 2025
North:
Nan, Phrae, Uttaradit, and
Phetchabun.
Northeast:
Nakhon Phanom, Sakon Nakhon,
Mukdahan, Bueng Kan, Nong Khai, Yasothon,
Amnat Charoen,
Ubon Ratchathani, Udon Thani, Nong Bua Lam Phu, Kalasin,
Khon Kaen, and
Loei.
East:
Chanthaburi and Trat.
South: Chumphon, Ranong,
Phangnga, and Phuket.
31 August 2025
North:
Nan, Phrae, Uttaradit,
Phetchabun, Phitsanulok, Phichit, Sukhothai, Tak, Kamphaeng Phet, Chiang Mai, Lampang, Lamphun, and Mae Hong Son.
Northeast: Nakhon Phanom, Sakon
Nakhon, Mukdahan, Bueng Kan, Nong Khai, Loei, Udon Thani,
Nong Bua Lam Phu,
Kalasin, Maha Sarakham, Khon Kaen, and Chaiyaphum.
Central: Lopburi,
Saraburi, Nakhon Sawan, and Uthai Thani.
East: Nakhon Nayok, Prachin Buri,
Rayong, Chanthaburi, and Trat.
South: Chumphon, Surat
Thani, Ranong, Phangnga, and Phuket.
1 September 2025
North:
Nan, Phrae, Uttaradit,
Phetchabun, Phitsanulok, Phichit, Sukhothai, Tak, Kamphaeng Phet, Chiang Mai, Lampang, Lamphun, and Mae Hong Son.
Northeast:
Nong Khai, Bueng Kan, Nong Bua
Lam Phu, Udon Thani, Sakon Nakhon, Nakhon Phanom, Kalasin,
and Mukdahan.
Central:
Lopburi, Saraburi, Phra Nakhon
Si Ayutthaya, Nakhon Sawan, and Uthai Thani
East: Nakhon
Nayok, Prachin Buri, Chanthaburi, and Trat.
South: Prachuap Khiri Khan,
Chumphon, Ranong, Phangnga, Phuket, and Krabi.
The southwest monsoon over the Andaman Sea, Thailand, and the Gulf of
Thailand will strengthen, leading to heavy rainfall in the eastern and western
southern regions of Thailand. The rather strong wind forces the waves in the
upper Andaman Sea and the upper Gulf up to 2-3 meters high and above 3 meters
high in thundershowers. All ships should proceed with caution and keep off
thundershowers, small boats in the upper Andaman Sea and the upper Gulf should
keep ashore and people along the coast of the East and the upper South west
coast should beware of storm surge during 30 August - 2 September.
This
advisory is in effect on 29 August 2025, at 5.00 p.m.
This
next issue will be on 29 August 2025, at 11.00 p.m.
(Signed) Sugunyanee Yavinchan
(Miss Sugunyanee
Yavinchan)
Director-General
Thai Meteorological Department
