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Bulletin issued at 23:02 HKT 22/Dec/2017

At 11 p.m. at the Hong Kong Observatory the air temperature was 17 degrees Celsius and the relative humidity 85 per cent.

The air temperatures at other places were:

King's Park 16 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 16 degrees;
Lau Fau Shan 15 degrees;
Tai Po 16 degrees;
Sha Tin 17 degrees;
Tuen Mun 16 degrees;
Tseung Kwan O 16 degrees;
Sai Kung 16 degrees;
Cheung Chau 17 degrees;
Chek Lap Kok 18 degrees;
Tsing Yi 17 degrees;
Shek Kong 16 degrees;
Tsuen Wan Ho Koon 14 degrees;
Tsuen Wan Shing Mun Valley 16 degrees;
Hong Kong Park 17 degrees;
Shau Kei Wan 16 degrees;
Kowloon City 16 degrees;
Happy Valley 17 degrees;
Wong Tai Sin 16 degrees;
Stanley 17 degrees;
Kwun Tong 16 degrees;
Sham Shui Po 17 degrees;
Kai Tak Runway Park 17 degrees;
Yuen Long Park 15 degrees;
Tai Mei Tuk 16 degrees.

Note:

The data above is provisional. Only limited data validation has been carried out.

Climatological Information for 22 Dec

Local Weather Forecast

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 23:15 HKT 22/Dec/2017

Here is the latest weather bulletin issued by the Hong Kong Observatory.

A relatively dry easterly airstream affected the coast of Guangdong today. Locally, it was cool this morning. The weather was fine and dry during the day. The relative humidity over the territory fell to 50 per cent or below. A replenishment of the northeast monsoon will bring generally fine and dry weather with cool mornings to southern China during Christmas Holidays.

Besides, Tembin intensified from a tropical storm into a severe tropical storm today. At 11 p.m., Tembin was centred about 740 kilometres south of Manila. It is forecast to move west at about 20 kilometres per hour across the southern part of the Philippines.

Weather forecast for Hong Kong (Saturday, 23 Dec 2017)

Mainly cloudy. Sunny periods during the day. Temperatures will range between 17 and 20 degrees. Moderate east to northeasterly winds.

Outlook : Mainly fine with cool mornings during Christmas Holidays.

(The above forecast period is valid up to 23:59 HKT tomorrow, 23/12/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Marine Forecast

South China Coastal Waters

Weather Forecast for Local Aviation

I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL WATERS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/10
       OFFSHORE:  080/15-20                            19-17
   B.   2000 FT:  080/15-20                            14
   C.   5000 FT:  140/10                               11
   D.  10000 FT:  240/20                               6
   E.  18000 FT:  280/25                               MS4
   F.  24000 FT:  280/25                               MS15
   G.  30000 FT:  280/40                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3900-5000 FT.
   I. WEATHER       : 
      MAINLY FINE. BECOMING CLOUDY TOMORROW MORNING.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 4000 FT.
   K. VISIBILITY    : 8 KM.
   L. 0 DEG. C LEVEL: 13000, 17000 FT  10 DEG. C LEVEL(S) : 8600 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTHEASTERLY WIND. SUNNY
     PERIOLDS.=

===================================================================
Note: The forecast could be updated before the next issue time 
whenever there is newly expected occurrence or non-occurrence 
of significant weather as described below which may be hazardous 
to aircraft within 100-km radius of Hong Kong:

(a) Change of the tropical cyclone category
(b) Strong, Gale, Storm, and Hurricane force winds
(c) Thunderstorm/CBs
(d) Severe gusts
(e) Severe turbulence
(f) Significant low stratus
(g) Fog or thick haze/sandstorm/duststorm 
    causing significant reduction of visibility
(h) Volcanic ash
(i) Radioactive cloud
===================================================================

Aviation Weather Observation and Forecast Information for Hong Kong International Airport

To know more about clouds, please see Commonly observed clouds in Hong Kong.

Significant Weather Information (SIGMET)

The Airport Meteorological Office is responsible for monitoring hazardous weather and phenomena in the atmosphere that may affect the safety of aircraft operations within a designated airspace over the northern part of the South China Sea. Weather forecasters at the Airport Meteorological Office issues SIGMET information when hazardous weather and phenomena in the atmosphere such as thunderstorms, tropical cyclones, turbulence, icing occur or are expected to occur in the airspace.

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