Weather Advisory
Subject: Tropical Depression
and heavy to very heavy rain in Thailand
No. 4 (227/2025)
------------------------
At 4.00 a.m.
LST (30 August 2025), tropical depression over the middle
of South China, it was centered about 210
kilometers east of Vinh, Vietnam or the center of the storm was located at
latitude 17.5 degrees north and longitude 118.5 degrees
east, with maximum sustained winds near the center at about 55 km/h. The storm
is moving
west-northwest with a speed of 22 km/hr. and it is expected to intensify into a
tropical storm before making landfall over Quang Binh district, Vietnam by the evening
of today (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 today (30 August) and northern of
Thailand by tomorrow
(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:
Prachinburi, Sa Kaeo,
Rayong, 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, Udon Thani,
Nong Bua
Lam Phu, Loei, Kalasin, Yasothon, Roi Et, 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 30 August 2025, at 5.00 a.m.
This
next issue will be on 30 August 2025, at 11.00 a.m.
(Signed) Sugunyanee Yavinchan
(Miss Sugunyanee
Yavinchan)
Director-General
Thai Meteorological Department
