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 3:35 P.M. ON 18 SEPTEMBER
2025

WARNINGS:

STORM FORCE WINDS IN SHANWEI. GALE FORCE WINDS IN HONG KONG
ADJACENT WATERS, NAN'AO AND SOUTH OF HONG KONG. STRONG
WINDS IN SHANGCHUAN DAO.

WEATHER SITUATION:

THE TROPICAL DEPRESSION OVER THE NORTHEASTERN PART OF THE
SOUTH CHINA SEA HAS INTENSIFIED INTO A TROPICAL STORM AND
WAS NAMED MITAG.
 
AT 3 P.M., MITAG WITH MAXIMUM SUSTAINED WINDS OF ABOUT 65
KILOMETRES PER HOUR NEAR ITS CENTRE WAS LOCATED AT 20.1
DEGREES NORTH, 117.8 DEGREES EAST. IT IS FORECAST TO MOVE
NORTHWEST AT ABOUT 18 KILOMETRES PER HOUR IN THE GENERAL
DIRECTION OF THE COAST OF EASTERN GUANGDONG.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST TO NORTHEAST FORCE 4 TO 5, BECOMING NORTH TO NORTHWEST
UP TO FORCE 8 LATER.
OCCASIONAL HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE SEAS, BECOMING VERY ROUGH LATER.

NAN'AO:
EAST TO NORTHEAST FORCE 6 TO 7, BECOMING CYCLONIC FORCE 9.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
ROUGH SEAS, BECOMING VERY ROUGH.

SHANWEI:
NORTHEAST FORCE 5 TO 6, BECOMING CYCLONIC FORCE 10 LATER.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS, BECOMING HIGH LATER.

SOUTH OF HONG KONG:
NORTHEAST FORCE 4 TO 5, BECOMING NORTH TO NORTHWEST UP TO
FORCE 8 LATER.
OCCASIONAL HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE SEAS, BECOMING VERY ROUGH LATER.

SHANGCHUAN DAO:
EAST TO NORTHEAST FORCE 4 TO 5, BECOMING NORTH FORCE 6
LATER.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS, BECOMING ROUGH LATER.

OUTLOOK FOR THE FOLLOWING 48 HOURS

SOUTHWESTERLY WINDS OF UP TO FORCE 7, CYCLONIC WINDS OF
FORCE 10 IN EAST AT FIRST. FREQUENT HEAVY SQUALLY SHOWERS
AND THUNDERSTORMS.

LATEST REPORTS FROM SOUTH CHINA COASTAL WEATHER STATIONS

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WAGLAN ISLAND      WIND EAST-NORTHEAST FORCE 3 
                   VISIBILITY OVER 50 KILOMETRES

SHANTOU            WIND EAST-SOUTHEAST FORCE 2 
                   VISIBILITY 30 KILOMETRES

HUANGMAOZHOU       WIND EAST FORCE 4

MACAU              WIND EAST-NORTHEAST FORCE 2 
                   VISIBILITY OVER 55 KILOMETRES

XISHA              WIND EAST-NORTHEAST FORCE 2 
                   VISIBILITY 29 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 15:38 HKT ON 18.09.2025