Weather
Advisory
Subject:
Heavy to Very Heavy Rain in Thailand
No.5 (221/2026)
----------------------------
During 23 – 27 September 2026, the active low-pressure cell over the middle coast of
Vietnam has moved to cover Cambodia, expected to cover the lower Northeast, the
East, the Central including Bangkok and vicinity along the monsoon trough lying
across upper Thailand. Meanwhile the southwest monsoon prevailing across the
Andaman Sea, Thailand and the Gulf will strengthen. Isolated heavy to very heavy rains are likely
over the country especially in the North, the lower Northeast, the Central
including Bangkok and vicinity, the East and the South regions. The initial
impacts are expected over the lower Northeast and the East, with other regions
forecast to be affected subsequently.
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 strengthened winds forces the wave in the upper Gulf and
the upper Andaman Sea up to 2 - 3 meters and above 3 meters high in
thundershowers. The waves in the lower Gulf and the lower Andaman
Sea are likely about 2 meters high with above 2 meters high in thundershowers. All
ships should proceed with caution and keep off thundershowers. Small boat in
the upper Gulf and the upper Andaman Sea should keep ashore by lasting 27
September 2026.
The advisory is in effect on 23 September
2026, at 5.00 p.m.
This next issue will be on 24 September 2026, at 5.00 a.m.
(Signed) Sugunyanee Yavinchan
(Miss
Sugunyanee Yavinchan)
Director-General
Thai Meteorological Department