SOUTH CHINA COASTAL WATERS

(NOT TO BE ISSUED AFTER 4:30 P.M.)

WEATHER INFORMATION FOR SOUTH CHINA COASTAL WATERS ISSUED
BY THE HONG KONG OBSERVATORY AT 4 P.M. ON 20 SEPTEMBER 2025

WARNINGS:

STRONG WINDS IN NAN'AO.

WEATHER SITUATION:

SEVERE TROPICAL STORM RAGASA HAS INTENSIFIED INTO A TYPHOON.
 
AT 4 P.M., RAGASA WITH MAXIMUM SUSTAINED WINDS OF ABOUT 140
KILOMETRES PER HOUR NEAR ITS CENTRE WAS LOCATED AT 16.9
DEGREES NORTH, 128.7 DEGREES EAST. IT IS FORECAST TO MOVE
WEST-NORTHWEST AT ABOUT 15 KILOMETRES PER HOUR TOWARDS THE
VICINITY OF THE LUZON STRAIT.
 
TROPICAL DEPRESSION MITAG HAS WEAKENED INTO AN AREA OF LOW
PRESSURE OVER INLAND GUANGDONG.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

SOUTH FORCE 4 TO 5, BECOMING EAST TO SOUTHEAST UP TO FORCE
5.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

NAN'AO:
EAST TO SOUTHEAST FORCE 4 TO 5, BECOMING NORTHEAST UP TO
FORCE 6 LATER.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS, BECOMING ROUGH LATER.

SHANWEI AND SOUTH OF HONG KONG:
SOUTH TO SOUTHWEST FORCE 4 TO 5, BECOMING EAST TO SOUTHEAST
UP TO FORCE 5.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

SHANGCHUAN DAO:
WEST TO SOUTHWEST FORCE 4 TO 5, BECOMING SOUTH UP TO FORCE
5.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

OUTLOOK FOR THE FOLLOWING 48 HOURS

EASTERLY WINDS OF FORCE 5 TO 6, BECOMING CYCLONIC WINDS UP
TO FORCE 12 LATER. FREQUENT HEAVY SQUALLY SHOWERS AND
THUNDERSTORMS.

LATEST REPORTS FROM SOUTH CHINA COASTAL WEATHER STATIONS

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WAGLAN ISLAND      WIND WEST FORCE 2 
                   VISIBILITY 39 KILOMETRES

SHANTOU            WIND EAST-SOUTHEAST FORCE 1 
                   VISIBILITY 11 KILOMETRES IN RAIN

HUANGMAOZHOU       WIND SOUTH FORCE 1

MACAU              WIND WEST-NORTHWEST FORCE 1 
                   VISIBILITY 40 KILOMETRES

XISHA              WIND WEST-SOUTHWEST FORCE 2 
                   VISIBILITY 23 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 16:00 HKT ON 20.09.2025