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Weather Indices

Weather Indices
  Weather Indices (Continued)

Soaring Index
(Soaring Conditions)

Please note that the observations may change from time to time, as well as from place to place, for reasons ranging from changes in the synoptic situation to short-term or local changes due to the complex coastal and mountainous terrain in Hong Kong. Users are advised to exercise utmost care in interpreting the information presented here and to monitor the weather conditions closely.

For general enquiries on the content of this webpage, please call Experimental Officer (Aviation Weather Forecast and Warning Services) at 2926 8335 during office hours on Monday to Friday (except public holidays).

(2) Soaring Index

The Soaring Index is a measure of the lift offered by convective clouds. It is commonly calculated using weather information between 5 000 feet (1 524 metres) and 20 000 feet (6 096 metres). The latest Soaring Index is shown on the left.

As a general guideline+:

Soaring Index Soaring Conditions
Below -10
-10 to 5
5 to 20
Above 20

* Please note that the chance of having showers and thunderstorms increases with the Soaring Index. Users are advised to check the latest Weather Report and Forecast and Weather Radar Image from time to time.

+ Handbook of Meteorological Forecasting for Soaring Flight. World Meteorological Organization Technical Note No.158. (WMO - No.495).

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