Weather Advisory
Subject: Storm “RAGASA”
and heavy to very
heavy rain in Thailand
No.3 (251/2025)
------------------------
At 04.00 a.m. LST (23 September 2025), typhoon “RAGASA”, cover
the upper South China Sea or at latitude 19.7
degrees north and longitude 118.9 degrees east with
maximum sustained winds about 195 km./hr.
This storm is moving west with a speed of 20 km/hr. It is expected to move near Hong Kong, China
and move closer to the southern coast of China, passing through Hainan Island
into the Gulf of Tonkin on 25 September
2025. It
is expected to weaken into tropical storm before making landfall over upper
Vietnam. Storm “RAGASA” is forecast to downgrade rapidly due to the extending
of the high pressure system of China during 25 – 26 September.
The
storm “RAGASA” effects to the monsoon through which lie across the North and
the upper Northeast and southwest monsoon which prevail over the Thailand more
strength. Heavy to very heavy rain will occur in the North, the Northeast, the
Central, the East including Bangkok and vicinity during 23-26 September 2025. People in the country
should beware of heavy to very heavy rain and accumulation that may cause flash
floods and overflows especially along the waterways near foothills and
lowlands. The wind force waves in the upper Andaman Sea up to 2-3 meters high
and above 3 meters high in thundershowers. All ships in the Andaman Sea should
proceed with caution. Small boats in the upper Andaman Sea should keep ashore
during 24 – 26 September 2025.
This advisory is in effect on 23 September
2025, at 05.00 a.m.
This next issue will be on 23 September 2025,
at 11.00 a.m.
(Signed) Sugunyanee Yavinchan
(Miss Sugunyanee
Yavinchan)
Director-General
Thai Meteorological Department