Weather Advisory
Subject: Storm “RAGASA”
and heavy to very heavy rain in Thailand
No.9 (257/2025)
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At 04.00 p.m.
LST (24 September 2025), typhoon “RAGASA”, the south coast of Guangdong, China or
at latitude 21.5 degrees north and longitude 111.8 degrees east with maximum
sustained winds about 155 km./hr.
This storm is moving west with a speed of 20 km/hr. It is expected to move pass the south of Guangdong, China and move 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. This storm is not
move to Thailand.
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 24-26 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 24 September 2025, at 05.00 p.m.
This
next issue will be on 24 September 2025, at 11.00 p.m.
(Signed) Sugunyanee Yavinchan
(Miss Sugunyanee
Yavinchan)
Director-General
Thai Meteorological Department