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A Brief Overview of the Hong Kong Observatory http://www.weather. gov . hk / • An official department of the Government of the Hong Kong Sp ecial Administrative Region • forecasts weather and issues w arnings on weather-related haz ards
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A Brief Overview of the Hong Kong Observatory An official department of the Government of the Hong Kong Special Administrative.

Dec 21, 2015

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Page 1: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

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

Page 2: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

• Observations

• Weather Bulletin

• Weather Report

• Weather Forecast

• Warnings

• Tropical Cyclone

• Other services

Page 3: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

Observations

• Surface observations in headquarters, King’s Park and airport

• 67 automatic weather stations located in various places

Page 4: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

• Balloon-borne measurement regularly

• Weather radar at Tai Mo Shan, Tate’s Cairn and Tai Lam Chung

• Information exchange with other stations

Page 6: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

Weather Reprot

• Daily

• General condition, e.g sunny, partly cloudy, etc

• Weather map

• High and low temperature

• Relative humidity range

• Wind, direction and speed

Page 7: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

• Amount of rainfall

• UV index, highest and average

• Warnings, if any

Page 9: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

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.

Page 12: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

• 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

Page 18: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

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

Page 19: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

Wind Speeds

Description Beaufort Force Wind Speed (km/h)

Light 1-2 2-12

Moderate 3-4 13-30

Fresh 5 31-40

Strong 6-7 41-62

Gale 8-9 63-87

Storm 10-11 88-117

Hurricane 12 >118

Page 20: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

Classification

ClassMaximum Sustained Wind Speed (km/h)

Tropical Depression <63

Tropical Storm 63-87

Severe Tropical Storm 88-117

Typhoon >118

Page 21: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

Warning Signals

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

Name

Standby Signal 1

Strong Wind Signal 3

Page 22: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

Northwest Gale or Storm Signal 8NW

Southwest Gale or Storm Signal 8SW

Northeast Gale or Storm Signal 8NE

Southeast Gale or Storm Signal 8SE

Increasing Gale or Storm Signal 9

Hurricane Signal 10

Page 23: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

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

Page 24: A Brief Overview of the Hong Kong Observatory  An official department of the Government of the Hong Kong Special Administrative.

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