Weather Advisory
Subject: Heavy to very heavy rains in
Thailand,
Strong Wind-Waves in the upper Andaman Sea
No. 17 (77/2026)
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On 21 May 2026 the rather
strong southwest monsoon prevails over the upper Andaman Sea
and Thailand while the low-pressure cell covers the lower North and the upper
Northeast regions. Continuous rainfalls and isolated heavy rains are forecast in
the country while isolated very heavy rains are possible in
the South (west coast) regions. People should beware of heavy to very heavy
rains and accumulations that may cause flash flood and overflows, especially
along foothills near waterways and lowlands.
The rather strong wind forces the waves in
the upper Andaman Sea up to be 2–3 meters high
and above 3 meters high in thundershowers. In the lower Andaman Sea and the upper
Gulf, the waves are expected about 2 meters high and above 2 meters high in
thundershowers.
All ships should proceed with caution and
keep off thundershowers, small boats in the upper Andaman Sea keep ashore.
This
advisory is in effect on 21 May 2026, at 5.00 a.m.
This next issue will be on 21 May 2026, at 5.00 p.m.
(Signed) Sugunyanee Yavinchan
(Miss Sugunyanee Yavinchan)
Director-General
Thai Meteorological Department