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Tropical Cyclones in 2021 > Table 1.4

TROPICAL CYCLONES IN 2021

Table 1.4    Meaning of tropical cyclone warning signals in Hong Kong in 2021

Signals Symbol Display Meaning of Signals
Standby 1 Standby Signal No. 1 A tropical cyclone is centred within about 800 kilometres (km) of Hong Kong and may affect the territory.
Strong Wind 3 Strong Signal No. 3 Strong wind is blowing or expected to blow generally in Hong Kong near sea level, with a sustained speed of 41-62 kilometres per hour (km/h), and gusts which may exceed 110 km/h, and the wind condition is expected to persist.
NW'LY
Gale or Storm		 8 NW NW Signal No. 8 Gale or storm force wind is blowing or expected to blow generally in Hong Kong near sea level, with a sustained wind speed of 63-117 km/h from the quarter indicated and gusts which may exceed 180 km/h, and the wind condition is expected to persist.
SW'LY
Gale or Storm		 8 SW SW Signal No. 8
NE'LY
Gale or Storm		 8 NE NE Signal No. 8
SE'LY
Gale or Storm		 8 SE SE Signal No. 8
Increasing
Gale or Storm		 9 Increasing Gale or Storm Signal No. 9 Gale or storm force wind is increasing or expected to increase significantly in strength.
Hurricane 10 Hurricane Signal No. 10 Hurricane force wind is blowing or expected to blow with sustained speed reaching 118 km/h or above and gusts that may exceed 220 km/h.