Weather
Advisory
Subject:
Heavy to Very Heavy Rain in upper Thailand
No.11 (165/2026)
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The monsoon
trough lies 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.
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. In the lower Andaman
Sea, the waves are expected 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 and
the upper Gulf keep ashore.
The advisory is in effect on 20 August
2026, at 5.00 p.m.
This next issue will be on 21 August 2026, at 5.00 a.m.
(Signed) Sugunyanee
Yavinchan
(Miss
Sugunyanee Yavinchan)
Director-General
Thai
Meteorological Department