When will the weather forecast of Hong Kong Observatory release typhoon signal No.8?

No.8 gale or storm signal (English: No.8 northwest/southwest/northeast/southeast gale or storm signal) is a tropical cyclone warning signal in Hong Kong, commonly known as typhoon signal No.8 by the general public. According to the measured wind direction, the signals are divided into the No.8 gale or storm signals in northwest, southwest, northeast and southeast directions. Typhoon signal No.8 indicates that the sea surface near Hong Kong is now or is expected to be generally attacked by gale or storm from the direction indicated by the signal, with the sustained wind reaching 63-1 17 km per hour, and the gust may even exceed 180 km per hour, and the wind may continue.

If the wind lasts for 465,438+0 to 62 kilometers per hour and the gust may exceed 65,438+065,438+00 kilometers per hour, the weather forecast of the Hong Kong Observatory will cancel typhoon signal No.8 and change it to typhoon signal No.3..