Bulletin updated at 03:30 HKT 19/Sep/2025
By the Hong Kong Observatory at 3:30 a.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.
Weather Situation:
At 3 a.m., Tropical Storm Mitag with maximum sustained winds
of about 75 kilometres per hour near its centre was located
at 21.3 degrees north, 116.4 degrees east. It is forecast to
move northwest at about 18 kilometres per hour in the
general direction of the coast of eastern Guangdong and
intensify gradually.
Area forecasts for the next 24 hours
Hong Kong Adjacent Waters：
East to northeast force 5 to 6, becoming north to northwest
up to force 10 later.
Frequent heavy squally showers and thunderstorms.
Moderate to rough seas, becoming high later.
Nan'ao：
South to southeast force 6 to 7, up to force 9 at first.
Frequent heavy squally showers and thunderstorms.
Rough seas, high at first.
Shanwei：
Cyclonic force 7 to 8, becoming up to force 10.
Frequent heavy squally showers and thunderstorms.
Rough to very rough seas, becoming high.
South of Hong Kong：
North to northeast force 5 to 6, becoming west to northwest
up to force 9.
Frequent heavy squally showers and thunderstorms.
Moderate to rough seas, becoming very rough.
Shangchuan Dao：
East to northeast force 4 to 5, becoming west to northwest
force 5 later.
Scattered showers and squally thunderstorms.
Moderate seas.
Outlook for the following 48 hours
East to southeasterly winds of force 5 to 6, west to
southwesterly winds of up to force 10 at first. Frequent
heavy squally showers and thunderstorms.
Latest reports from south china coastal weather stations
--------------------------------------------------------
Waglan Island Wind northeast force 6
Visibility 50 kilometres or above
Shantou Wind south-southeast force 1
Visibility 30 kilometres
Huangmaozhou Wind northeast force 5
Macau Wind northeast force 2
Visibility 50 kilometres or above
Xisha Wind southeast force 1
Visibility 30 kilometres