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  • The Observatory Enhances its “Weather Information for Aviation Sports” Service

  • Thursday, 1st March 2018

The Hong Kong Observatory enhanced its "Weather Information for Aviation Sports" webpage today (1 March 2018). The enhanced webpage features twice daily vertical profiles of temperature and humidity, in the form of tephigram, up to an altitude of around 5,000 metres above ground level based on balloon sounding measurements obtained at King’s Park, and real-time time series of wind gusts for selected automatic weather stations in Hong Kong. The new information is useful for planning flying activities in aviation sports.

Mr Patrick CHUNG of the Hong Kong Paragliding Federation said, "the tephigram is very useful to reveal stability condition of the atmosphere, and allow users to assess whether the weather is favourable to do paragliding." Mr Richard Threlfall, Chairman of the Hong Kong Paragliding Association said, "the time series of wind gusts enables improved appreciation of wind variations, especially for safe take off and landing".

The enhanced webpage of “Weather Information for Aviation Sports” is available at ( A brief introduction to the tephigram is available in the Education resources (

In addition, the schedule of issuing the “Weather Forecast for Local Aviation” will also be increased from 3 times to 4 times per day. One additional forecast will be issued at 12:30 p.m. every day, providing the latest information on the weather for the afternoon and the night.

Figure 1
Figure 1: Tephigram
Figure 2
Figure 2: Sample time series of maximum gust and mean wind speed