SOUTH CHINA COASTAL WATERS

(NOT TO BE ISSUED AFTER 11:30 P.M.)

WEATHER INFORMATION FOR SOUTH CHINA COASTAL WATERS ISSUED
BY THE HONG KONG OBSERVATORY AT 7:45 P.M. ON 20 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.

TYPHOON RAGASA HAS INTENSIFIED INTO A SEVERE TYPHOON.
 
AT 8 P.M., RAGASA WITH MAXIMUM SUSTAINED WINDS OF ABOUT 165
KILOMETRES PER HOUR NEAR ITS CENTRE WAS LOCATED AT 17.3
DEGREES NORTH, 128.6 DEGREES EAST. IT IS FORECAST TO MOVE
WEST-NORTHWEST AT ABOUT 15 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 LATER.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS, BECOMING ROUGH LATER.

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

SHANGCHUAN DAO:
SOUTH TO SOUTHEAST FORCE 4 TO 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 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-NORTHEAST FORCE 2 
                   VISIBILITY 44 KILOMETRES

SHANTOU            WIND EAST-SOUTHEAST FORCE 1 
                   VISIBILITY 30 KILOMETRES IN RAIN

HUANGMAOZHOU       WIND NORTHEAST FORCE 3

MACAU              WIND NORTH-NORTHEAST FORCE 2 
                   VISIBILITY 20 KILOMETRES IN THUNDERSTORMS

XISHA              WIND SOUTHWEST FORCE 2 
                   VISIBILITY 29 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 19:47 HKT ON 20.09.2025