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TROPICAL CYCLONES IN 2011

TABLE 1.4    

MEANING OF TROPICAL CYCLONE WARNING SIGNALS IN HONG KONG IN 2011

Signals Symbol Display Meaning of Signals
Standby 1 symbol of Standby Signal No. 1 A tropical cyclone is centred within about 800 km of Hong Kong and may affect the territory.
Strong Wind 3 symbol of Strong Wind Signal No. 3 Strong wind is expected or blowing 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 symbol of No. 8 NW Gale or Storm Signal

Gale or storm force wind is expected or blowing 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 symbol of No. 8 SW Gale or Storm Signal
NE' LY
Gale or Storm		 8 NE symbol of No. 8 NE Gale or Storm Signal
SE' LY
Gale or Storm		 8 SE symbol of No. 8 SE Gale or Storm Signal
Increasing Gale
or Storm		 9 symbol of No. 9 Increasing Gale or Storm Signal Gale or storm force wind is increasing or expected to increase significantly in strength.
Hurricane 10 symbol of No. 10 Hurricane Force Wind Signal Hurricane force wind is expected or blowing with sustained speed reaching upwards from 118 km/h and gusts that may exceed 220 km/h.


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