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A Brief Overview of the Hong Kong Observatory

A Brief Overview of the Hong Kong Observatory. http://www.weather.gov.hk/ An official department of the Government of the Hong Kong Special Administrative Region forecasts weather and issues warnings on weather-related hazards. Observations Weather Bulletin Weather Report Weather Forecast

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A Brief Overview of the Hong Kong Observatory

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  1. A Brief Overview of the Hong Kong Observatory • http://www.weather.gov.hk/ • An official department of the Government of the Hong Kong Special Administrative Region • forecasts weather and issues warnings on weather-related hazards

  2. Observations • Weather Bulletin • Weather Report • Weather Forecast • Warnings • Tropical Cyclone • Other services

  3. Observations • Surface observations in headquarters, King’s Park and airport • 67 automatic weather stations located in various places

  4. Balloon-borne measurement regularly • Weather radar at Tai Mo Shan, Tate’s Cairn and Tai Lam Chung • Information exchange with other stations

  5. Weather Bulletin • Hourly • Temp. • Relative humidity • UV index • Regional weather (temp. and rainfall) • Weather information for south china coastal waters (general condition and wind) • http://www.weather.gov.hk/wxinfo/currwx/current.htm

  6. Weather Reprot • Daily • General condition, e.g sunny, partly cloudy, etc • Weather map • High and low temperature • Relative humidity range • Wind, direction and speed

  7. Amount of rainfall • UV index, highest and average • Warnings, if any

  8. Weather Forecast • Next day and 5-day • By supercomputer • General condition, e.g. sunny, rainy, etc • Wind, direction and speed • High and low temperature • Relative humidity range • http://www.weather.gov.hk/wxinfo/currwx/f5d.htm

  9. Warnings • http://www.weather.gov.hk/textonly/explain/intro.htm • Rainstorm warning signals • Amber: Heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 30 millimetres in an hour. • Red: Heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 50 millimetres in an hour, and is likely to continue.

  10. Black: Very heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 70 millimetres in an hour, and is likely to continue. • http://www.weather.gov.hk/wservice/warning/rainstor.htm

  11. Thunderstorm warnings issued by the Observatory are intended to give short term (four hours or less) notice of the likelihood of thunderstorms affecting any part of Hong Kong. • http://www.weather.gov.hk/wservice/warning/thunder.htm

  12. A Special Announcement on Flooding in the Northern New Territories will be issued by the Hong Kong Observatory whenever heavy rain affects the area and flooding is expected to occur or is occurring in the low-lying plains of northern New Territories. • http://www.weather.gov.hk/wservice/warning/flood.htm

  13. A landslip warning will be issued by the Hong Kong Observatory whenever the Geotechnical Engineering Office expects a high chance of many landslips as a result of persistent heavy rainfall. • http://www.weather.gov.hk/wservice/warning/landslip.htm

  14. It is hoisted when winds associated with the summer or winter monsoon are blowing in excess of or are expected to exceed 40 kilometres per hour near sea level anywhere in Hong Kong. • http://www.weather.gov.hk/wservice/warning/smse.htm

  15. This warning is issued whenever ground frost is expected to occur on high ground or inland in the New Territories. • http://www.weather.gov.hk/wservice/tsheet/pubwx.htm#frost

  16. A fire danger warning is issued whenever the relative humidity of the atmosphere is below certain criteria and when the vegetation is dry. A yellow fire danger warning indicates that the fire risk is high while a red fire danger warning indicates that the fire risk is extreme. • http://www.weather.gov.hk/wservice/tsheet/pubwx.htm#fire

  17. It issues warnings whenever Hong Kong is threatened by cold or very hot weather, to alert members of the public to the danger of low body temperature or the risk of heatstroke and sunburn due to cold weather or very hot weather respectively. • http://www.weather.gov.hk/wservice/warning/coldhot.htm

  18. Tropical Cyclones • On average, there are about 6 to 7 tropical cyclones or typhoons every year entering 800km from Hong Kong. • The Observatory will issue warnings to alert the general publics. • http://www.weather.gov.hk/informtc/informtc.htm

  19. Wind Speeds

  20. Classification

  21. Warning Signals • http://www.weather.gov.hk/informtc/tcsignal.htm

  22. Names of Typhoons • Before Dec 31, 1999, tropical cyclones in the western north pacific were named by U.S.A. • With effect from Jan 1, 2000, each name in a list will be used in turn. The names in the list are suggested by various countries. • http://www.weather.gov.hk/informtc/sound/tcname2000e.htm

  23. Other Services • Tidal Information • Seismology: monitor earthquake activities around Hong Kong • Time Service: provide accurate time service with atomic clock • Astronomy: times of rise and set of the Sun, the Moon and planets, times of eclipses, etc • Radiation Monitoring

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