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Bulletin issued at 04:02 HKT 20/Dec/2018

At 4 a.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 83 per cent.

The air temperatures at other places were:

King's Park 20 degrees;
Wong Chuk Hang 20 degrees;
Ta Kwu Ling 20 degrees;
Lau Fau Shan 19 degrees;
Tai Po 20 degrees;
Sha Tin 21 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 20 degrees;
Cheung Chau 20 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 21 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 20 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 20 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 21 degrees;
Stanley 20 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 20 degrees;
Yuen Long Park 20 degrees;
Tai Mei Tuk 20 degrees.


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


Climatological Information for 20 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 03:45 HKT 20/Dec/2018

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

An easterly airstream is affecting the coast of Guangdong.

Weather forecast for today

Mainly cloudy. Sunny periods during the day. Temperatures will range between 20 and 24 degrees. Moderate easterly winds.

Outlook : Warm with sunny periods in the following couple of days. Temperatures falling progressively early to midweek next week.


(The above forecast period is valid up to 23:59 HKT today, 20/12/2018; 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 21:00 HKT 19/Dec/2018

N0 WARNING.

GENERAL SITUATION AT 190900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 191300 UTC:

HONG KONG= E 4-5, UP TO 6 AT FIRST. LIGHT RAIN PATCHES. SEA 2 M, UP TO 3 M AT FIRST. SWELL E UP TO 2 M. TEMP 20-24 C. =
KWANGTUNG= E 4-5, OCNL 6 IN E. LGT RAIN PATCHES. SEA 2 M, UP TO 3 M IN E. SWELL E TO NE 2 M. =
TAIWAN STRAIT= NE 4-5. FINE. SEA UP TO 2 M. SWELL NE UP TO 2 M. =
BASHI= E 5-6, OCNL 7. CLD. SEA UP TO 4 M. SWELL E TO NE 3 M. =
PRATAS= E 5-6, OCNL 7. CLD. SEA UP TO 4 M. SWELL E TO NE 3 M. =
BALINTANG= E 5-6, OCNL 7. CLD. SEA UP TO 4 M. SWELL E TO NE 3 M. =
SCARBOROUGH= E TO NE 5-6. CLD. SEA 2-3 M. SWELL E TO NE 3 M. =
PARACEL= E 4-5, OCNL 6. CLD. SEA UP TO 3 M. SWELL E TO NE 2-3 M. =
TONKIN= E TO SE 4-5. DOWN TO 4000 M IN MORNING MIST OR LGT RAIN PATCHES. SEA UP TO 2 M. =
DANANG= E TO SE 4-5. LGT RAIN PATCHES. SEA UP TO 2 M. SWELL NE 2-3 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

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 03:30 HKT 20/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 20 December 2018

    Warnings:
    Strong winds in Nan'ao, Shanwei and south of Hong Kong.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5.
    A few light rain patches.
    Moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Shangchuan Dao:
    East to southeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 4 to 5, up to force 6 in east later.

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

    Waglan Island Wind northeast force 4
      Visibility 13 Kilometres

    Dongsha Wind east-northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 5

    Macau Wind east-southeast force 2
      Visibility 6 Kilometres

    Xisha Wind east-northeast force 1
      Visibility 11 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 01:30 HKT 19/DEC/2018
    (Next update at 9:00-9:30 HKT 20/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
       OFFSHORE:  090/15-20, OCNL 25                   19-25
   B.   2000 FT:  110/20-25, OCNL 30                   16
   C.   5000 FT:  210/10                               13
   D.  10000 FT:  280/20                               13
   E.  18000 FT:  240/40                               MS3
   F.  24000 FT:  240/45                               MS14
   G.  30000 FT:  240/40                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1800 - 2500 FT.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ONE OR TWO LIGHT RAIN
      PATCHES AT FIRST
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.
   K. VISIBILITY    : 9 KM. DOWN TO 4000 M IN RAIN PATCHES.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 11200 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS.  SUNNY PERIODS.=

    ===================================================================
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)

    Please click here for more about the SIGMET

    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 20/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     21.5 C
Minimum Air Temperature                     18.5 C
Grass Minimum Temperature                   15.4 C
Relative Humidity                        73 - 83 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2385.6 mm

Other Stations                Min                  Max
King's Park                  17.8 C               22.4 C
Wong Chuk Hang               18.3 C               23.5 C
Ta Kwu Ling                  17.5 C               23.7 C
Lau Fau Shan                 16.8 C               25.7 C
Tai Po                       17.5 C               21.4 C
Sha Tin                      17.7 C               21.1 C
Tuen Mun                     17.3 C               23.5 C
Tseung Kwan O                17.5 C               20.8 C
Sai Kung                     18.3 C               21.1 C
Cheung Chau                  17.7 C               23.4 C
Chek Lap Kok                 18.9 C               24.4 C
Tsing Yi                     18.6 C               23.5 C
Shek Kong                    17.2 C               24.0 C
Tsuen Wan Ho Koon            16.7 C               24.6 C
Tsuen Wan Shing Mun Valley   18.0 C               24.1 C
Hong Kong Park               18.3 C               22.4 C
Shau Kei Wan                 18.0 C               20.6 C
Kowloon City                 17.5 C               23.1 C
Happy Valley                 18.4 C               23.5 C
Wong Tai Sin                 18.1 C               24.2 C
Stanley                      18.2 C               21.0 C
Kwun Tong                    17.6 C               21.4 C
Sham Shui Po                 18.1 C               24.1 C
Kai Tak Runway Park          18.6 C               21.2 C
Yuen Long Park               16.5 C               25.3 C
Tai Mei Tuk               17.2 C               23.8 C

Duration of sunshine (King's Park):              6.4 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 (19 Dec 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.15 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                        0.15

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 19 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Dec 2018> 

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