The Tropical Cyclone Warning Signal Mechanism on this website:

Tropical Cyclone Attention Signal

The Tropical Cyclone Attention Signal indicates that a tropical cyclone may enter Hong Kong within a range of 800 kilometers in the next seven days. The public have to pay attention to the news on this website.

Tropical Cyclone Standby Signal No.1

Tropical Cyclone Warning Signal No. 1 indicates that a tropical cyclone may/has entered within 800 kilometers of Hong Kong in the next 24 hours. The public should avoid activities at sea and pay attention to the news on this website and the Hong Kong Observatory (HKO) .

Tropical Cyclone Strong Wind Signal No.2

Tropical Cyclone Strong Wind Signal No. 2 indicates that strong winds due to tropical cyclones are likely to occur in Hong Kong in the next 3 hours or less. The public should refrain from non-essential activities at sea, bring an umbrella when going out, and follow news from this website and the observatory. (Especially for the kindergarten students and their parents, They should pay attention to whether the Hong Kong Observatory (HKO) will issue the Strong Wind Signal No.3.)

Tropical Cyclone pre-gale Signal No.3

There are strong winds in Hong Kong now, but gusts are likely in three hours or less. Members of the public are not advised to engage in marine activities, should avoid going out, and pay attention to the information on this website and the Hong Kong Observatory (HKO) .

Tropical Cyclone Gale Signal No. 4

Tropical Cyclone Gale Signal No. 4 indicates that gale force winds are currently blowing in Hong Kong. Members of the public should lock their doors and windows, and refrain from going out, especially for activities at sea, and pay attention to the news on this website and the Hong Kong Observatory (HKO) to see if they still need to go to work or school.

Tropical Cyclone Hurricane Signal No.4

Tropical Cyclone Hurricane Signal No.5 indicates that a hurricane is currently blowing over Hong Kong. Citizens should lock their doors and windows, take care of the safety of the elderly and children at home, never go out, let alone sea activities, and pay attention to news from this website, and the Hong Kong Observatory (HKO). See if your location is safe.