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Bulletin issued at 17:02 HKT 21/Dec/2018

At 5 p.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 81 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.6. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 25 degrees;
Tai Po 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 23 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 23 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 22 degrees;
Kwun Tong 22 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 22 degrees.


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


Climatological Information for 21 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 16:45 HKT 21/Dec/2018

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

A warm easterly airstream is affecting the coast of Guangdong. Locally, temperatures over most parts of the territory rose to 25 degrees or above in the afternoon.

Weather forecast for tonight and tomorrow

Mainly cloudy with a minimum temperature of around 21 degrees. There will be coastal mist in the morning and at night tomorrow. Warm with sunny periods during the day. The maximum temperature will be about 24 degrees. Moderate east to northeasterly winds, occasionally fresh offshore at first.

Outlook : Cooler and cloudier on Sunday and on Monday. The weather will be brighter over the Christmas holidays. Temperatures falling significantly in the latter part of next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 22/12/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 21/Dec/2018

N0 WARNING.

GENERAL SITUATION AT 202100 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= E 4, NE 4-5 LATER. CLD. DOWN TO 100 M IN FOG PATCHES AT FIRST. SEA UP TO 2 M LATER. TEMP 25-21 C. =
KWANGTUNG= E 4-5, NE 5-6 LATER. CLD. DOWN TO 500 M IN FOG PATCHES AT FIRST. SEA UP TO 2 M, 3 M LATER. =
TAIWAN STRAIT= NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. =
BASHI= E 5-6, OCNL 7. RAIN PATCHES. SEA UP TO 4 M. SWELL E TO NE 2 M. =
PRATAS= E 4-5, OCNL 6. RAIN PATCHES. SEA UP TO 3 M. SWELL E TO NE 2 M. =
BALINTANG= E 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO NE 2 M. =
SCARBOROUGH= E TO NE 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO NE 2 M. =
PARACEL= E TO NE 4-5. CLD. SEA UP TO 2 M. SWELL E TO NE 2 M. =
TONKIN= E TO SE 4, OCNL 5. CLD. DOWN TO 500 M IN FOG PATCHES AT FIRST. SEA UP TO 2 M. =
DANANG= E TO SE 4-5. CLD. SEA UP TO 2 M. SWELL E 2 M. =
NNNN
Abbreviations:
KT, VRB, SLW, FRQ - knot, variable, slow, frequent STNR, QSTNR, C - stationary, quasi-stationary, degrees celsius WKN, INTSF, INTST, NC - weaken, intensify, intensity, no change LGT, ISOL, SCT, OCNL - light, isolated, scattered, occasional CLD, DZ, TS - cloudy, drizzle, thunderstorm

The date and time are specified by a 6-digit number DDHHMM. DD stands for the day of month, HH represents the hour while MM indicates the minute in UTC.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 16:30 HKT 21/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 21 December 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5, occasionally force 6.
    Mist patches later.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    East to northeast force 5 to 6.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    East to northeast force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6, becoming northerly winds of force 6 to 7.

    Latest reports from south China coastal weather stations
    --------------------------------------------------------

    Waglan Island Wind east-northeast force 4

    Shantou Wind east force 2
      Visibility 12 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Xisha Wind east-northeast force 3
      Visibility 22 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 21/DEC/2018
    (Next update at 01:30 HKT 22/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COAST OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10
       OFFSHORE:  090/15-20                            25-22
   B.   2000 FT:  120/15-20                            18
   C.   5000 FT:  130/10                               13
   D.  10000 FT:  230/20                               9
   E.  18000 FT:  260/30                               MS7
   F.  24000 FT:  250/35                               MS13
   G.  30000 FT:  240/30                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY. LOCALISED MIST LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9800 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS,
     OCCASIONALLY FRESH OFFSHORE AT FIRST.  SUNNY
     PERIODS. LOCALISED MIST.=

    ===================================================================
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.

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    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.

    There is no Significant Weather Information (SIGMET)

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    Tropical Cyclone Warning
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    Tropical Cyclone Warning

    There is no tropical cyclone warning signal.

    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    YESTERDAY'S WEATHER AND RADIATION LEVEL Skip to main content
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    Yesterday's Weather and Radiation Level

    Bulletin issued at 00:15 HKT 21/Dec/2018 
    HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:
------------------------------------------------------

Hong Kong Observatory
Maximum Air Temperature                     23.2 C
Minimum Air Temperature                     20.1 C
Grass Minimum Temperature                   17.5 C
Relative Humidity                        80 - 89 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2386.4 mm

Other Stations                Min                  Max
King's Park                  19.5 C               24.4 C
Wong Chuk Hang               20.2 C               25.5 C
Ta Kwu Ling                  20.0 C               25.9 C
Lau Fau Shan                 18.7 C               25.8 C
Tai Po                       19.7 C               23.2 C
Sha Tin                      20.1 C               25.2 C
Tuen Mun                     20.4 C               26.2 C
Tseung Kwan O                19.4 C               23.4 C
Sai Kung                     20.1 C               23.5 C
Cheung Chau                  19.1 C               25.6 C
Chek Lap Kok                 20.8 C               27.1 C
Tsing Yi                     19.5 C               26.3 C
Shek Kong                    18.4 C               27.3 C
Tsuen Wan Ho Koon            18.9 C               25.7 C
Tsuen Wan Shing Mun Valley   19.8 C               26.5 C
Hong Kong Park               18.9 C               24.0 C
Shau Kei Wan                 19.7 C               23.4 C
Kowloon City                 19.7 C               26.2 C
Happy Valley                 19.0 C               26.6 C
Wong Tai Sin                 20.0 C               25.4 C
Stanley                      19.9 C               24.1 C
Kwun Tong                    19.3 C               24.3 C
Sham Shui Po                 19.6 C               26.4 C
Kai Tak Runway Park          20.3 C               24.3 C
Yuen Long Park               18.8 C               27.6 C
Tai Mei Tuk               19.8 C               25.2 C

Duration of sunshine (King's Park):              2.0 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 5.
 

Yesterday's (20 Dec 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.14 microsievert per hour.  These are within the normal
range of fluctuation of the background radiation level in
Hong Kong (see Note). The average dose rates measured at the
radiation monitoring stations over various parts of the
territory were as follows :

Station                     Yesterday's average
                            (microsievert/hour)
Ping Chau                           0.09
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14

Note

      

    1. From readings taken at various locations in Hong Kong in the
past, the hourly mean ambient gamma radiation dose rate may
vary between 0.06 and 0.3 microsievert per hour. (1
microsievert = 0.000001 sievert = 0.001 millisievert)

    2. Temporal variations are generally caused by changes in
meteorological conditions such as rainfall, wind and
barometric pressure.

    3. Spatial variations are generally caused by differences in
the radioactive content of local rock and soil.

    4. The data displayed is provisional. Only limited data
validation has been carried out.
    Climatological Information for 20 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <21 Dec 2018> 

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