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 20 SEPTEMBER
2025

WARNINGS:

STRONG WINDS IN HONG KONG ADJACENT WATERS, SHANWEI AND
SOUTH OF HONG KONG.

WEATHER SITUATION:

AT 3 A.M., TROPICAL DEPRESSION MITAG WITH MAXIMUM SUSTAINED
WINDS OF ABOUT 55 KILOMETRES PER HOUR NEAR ITS CENTRE WAS
LOCATED AT 23.2 DEGREES NORTH, 114.4 DEGREES EAST. IT IS
FORECAST TO MOVE WEST-NORTHWEST SLOWLY ACROSS THE VICINITY
OF THE NORTHERN PART OF THE PEARL RIVER ESTUARY.
 
MEANWHILE, SEVERE TROPICAL STORM RAGASA WITH MAXIMUM
SUSTAINED WINDS OF ABOUT 110 KILOMETRES PER HOUR NEAR ITS
CENTRE WAS LOCATED AT 16.5 DEGREES NORTH, 129.6 DEGREES
EAST. IT IS FORECAST TO MOVE WEST-NORTHWEST AT ABOUT 10
KILOMETRES PER HOUR TOWARDS THE VICINITY OF THE LUZON
STRAIT.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

WEST FORCE 5 TO 6, UP TO FORCE 7 AT FIRST.
OCCASIONAL HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS.

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

SHANWEI:
SOUTH TO SOUTHWEST FORCE 4 TO 5, UP TO FORCE 7 AT FIRST.
OCCASIONAL HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE SEAS, ROUGH AT FIRST.

SOUTH OF HONG KONG:
WEST TO SOUTHWEST FORCE 4 TO 5, OCCASIONALLY FORCE 6.
OCCASIONAL HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS.

SHANGCHUAN DAO:
WEST TO SOUTHWEST FORCE 4 TO 5.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

OUTLOOK FOR THE FOLLOWING 48 HOURS

EAST TO SOUTHEASTERLY WINDS OF FORCE 4 TO 5, BECOMING NORTH
TO NORTHEASTERLY WINDS OF UP TO FORCE 9 IN EAST LATER.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.

LATEST REPORTS FROM SOUTH CHINA COASTAL WEATHER STATIONS

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WAGLAN ISLAND      WIND WEST FORCE 3 
                   VISIBILITY OVER 50 KILOMETRES

SHANTOU            WIND SOUTHEAST FORCE 2 
                   VISIBILITY 20 KILOMETRES IN RAIN

HUANGMAOZHOU       WIND SOUTHWEST FORCE 4

MACAU              WIND WEST-NORTHWEST FORCE 2 
                   VISIBILITY OVER 70 KILOMETRES

XISHA              WIND SOUTH-SOUTHWEST FORCE 1 
                   VISIBILITY 30 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 03:34 HKT ON 20.09.2025