Weather
Advisory
Subject:
Heavy to Very Heavy Rain in upper Thailand
No.13 (167/2026)
----------------------------
The monsoon
trough move to lies across the upper North and the Laos into the tropical
depression over Hainan, China while the rather strong southwest monsoon
prevailing over the Andaman Sea, Thailand and the Gulf is weakening with
isolated heavy to very heavy rains in Thailand especially in the North and the Central.
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 winds force 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.
In addtion, the
active low-pressure cell over Hainan, China has developed to tropical
depression. This storm is likely to make landfall over the South of Guangdong,
China during 23
- 24 August
2026.
This
storm will not move to Thailand and no direct effect on Thailand’s weather. The
travellers should check weather information before start the journey.
The final advisory is in effect on 21
August 2026, at 5.00 p.m.
(Signed) Sugunyanee
Yavinchan
(Miss
Sugunyanee Yavinchan)
Director-General
Thai
Meteorological Department