Hong Kong Tropical Cyclone Warning Signals
The Hong Kong tropical cyclone warning signals (Chinese: 熱帶氣旋警告信號), or informally typhoon signals (Chinese: 颱風信號), are a set of signals used to indicate the threat or effects of a tropical cyclone. The Hong Kong Observatory issues the warning signal if a tropical cyclone is centred within 800 kilometres (500 mi) of Hong Kong and may affect Hong Kong later. A very similar system, which is maintained by the Macao Meteorological and Geophysical Bureau, is used in Macao.
The signals are represented as a set of numbers and symbols. Previously lights are also used at night.
Read more about Hong Kong Tropical Cyclone Warning Signals: History, Current System, Meaning of Signals
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