Weather
Advisory
Subject:
Heavy to Very Heavy Rain in upper Thailand
No.4 (158/2026)
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During 18-21 August 2026, the
monsoon trough will lie across the North and the upper Northeast. Meanwhile,
the rather strong southwest monsoon prevails over the Andaman Sea, Thailand and
the Gulf with isolated heavy to very heavy rains in Thailand especially in the
North and the Northeast. People in the country should beware of heavy to very
heavy rains and accumulation that may cause flash floods, overflows and
landslides especially along the waterways near foothills and lowlands.
During 19-21 August 2026, the
rather strong wind forces the waves in the upper Andaman Sea up to 2-3 meters
high and above 3 meters high in thundershowers. In the lower Andaman Sea and
upper Gulf, the waves are about 2 meters high and above 2 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 upper Andaman Sea should keep ashore.
The advisory is in effect on 17
August 2026, at 5.00 a.m.
This next issue will be on 17 August 2026, at 5.00 p.m.
(Signed) Sugunyanee
Yavinchan
(Miss
Sugunyanee Yavinchan)
Director-General
Thai
Meteorological Department