Bulletin updated at 12:30 HKT 19/Sep/2025
By the Hong Kong Observatory at 12:30 p.m. on 19 Sep 2025
Warnings:
Storm force winds in Hong Kong adjacent waters and Shanwei.
Gale force winds in Nan'ao and south of Hong Kong. Strong
winds in Shangchuan Dao.
Weather Situation:
At noon, Severe Tropical Storm Mitag with maximum sustained
winds of about 90 kilometres per hour near its centre was
located at 22.5 degrees north, 115.5 degrees east. It is
forecast to move northwest at about 12 kilometres per hour
towards the coast of eastern Guangdong.
Area forecasts for the next 24 hours
Hong Kong Adjacent Waters：
North to northwest force 8 to 9, becoming up to force 10.
Frequent heavy squally showers and thunderstorms.
Very rough to high seas.
Nan'ao：
South to southeast force 6 to 7, up to force 8 at first.
Frequent heavy squally showers and thunderstorms.
Rough seas, very rough at first.
Shanwei：
South to southwest force 8 to 9, cyclonic up to force 10 at
first.
Frequent heavy squally showers and thunderstorms.
Very rough to high seas.
South of Hong Kong：
South to southwest force 7 to 8, north to northwest up to
force 8 at first.
Frequent heavy squally showers and thunderstorms.
Rough to very rough seas.
Shangchuan Dao：
North to northeast force 4 to 5, becoming west to southwest
up to force 6.
Scattered showers and squally thunderstorms.
Moderate seas, becoming rough.
Outlook for the following 48 hours
Easterly winds of force 5 to 6, west to southwesterly winds
of up to force 8 at first. Frequent heavy squally showers
and thunderstorms.
Latest reports from south china coastal weather stations
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Waglan Island Wind west-northwest force 4
Visibility 50 kilometres or above
Shantou Wind east-southeast force 3
Visibility 1500 metres in rain
Huangmaozhou Wind northwest force 6
Macau Wind north force 2
Visibility 50 kilometres or above
Xisha Wind west-southwest force 3
Visibility 18 kilometres