SOUTH CHINA COASTAL WATERS

(NOT TO BE ISSUED AFTER 5:30 A.M.)

WEATHER INFORMATION FOR SOUTH CHINA COASTAL WATERS ISSUED
BY THE HONG KONG OBSERVATORY AT 3:30 A.M. ON 21 SEPTEMBER
2025

WARNINGS:

STRONG WINDS IN NAN'AO.

WEATHER SITUATION:

AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL WATERS OF
GUANGDONG. MEANWHILE, THE UNSETTLED WEATHER ASSOCIATED WITH
THE REMNANT OF MITAG IS AFFECTING THE REGION.

SEVERE TYPHOON RAGASA HAS INTENSIFIED INTO A SUPER TYPHOON.
 
AT 3 A.M., RAGASA WITH MAXIMUM SUSTAINED WINDS OF ABOUT 195
KILOMETRES PER HOUR NEAR ITS CENTRE WAS LOCATED AT 17.9
DEGREES NORTH, 127.6 DEGREES EAST. IT IS FORECAST TO MOVE
WEST-NORTHWEST AT ABOUT 18 KILOMETRES PER HOUR TOWARDS THE
VICINITY OF THE LUZON STRAIT AND CONTINUE TO INTENSIFY.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST TO SOUTHEAST FORCE 4 TO 5.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

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

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

SHANGCHUAN DAO:
SOUTH TO SOUTHEAST FORCE 4, OCCASIONALLY FORCE 5, BECOMING
EAST 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 OF
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 EAST-SOUTHEAST FORCE 4 
                   VISIBILITY 40 KILOMETRES

SHANTOU            WIND EAST FORCE 2 
                   VISIBILITY 30 KILOMETRES IN DRIZZLE

HUANGMAOZHOU       WIND SOUTHEAST FORCE 4

MACAU              WIND SOUTHEAST FORCE 2 
                   VISIBILITY OVER 50 KILOMETRES

XISHA              WIND SOUTH FORCE 1 
                   VISIBILITY 30 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 03:31 HKT ON 21.09.2025