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Bulletin issued at 09:02 HKT 20/Dec/2018

At 9 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 85 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.5. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 21 degrees;
Tai Po 20 degrees;
Sha Tin 21 degrees;
Tuen Mun 22 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 21 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 22 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 22 degrees;
Happy Valley 22 degrees;
Wong Tai Sin 23 degrees;
Stanley 21 degrees;
Kwun Tong 22 degrees;
Sham Shui Po 22 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 21 degrees.

Between midnight and 9 a.m. the minimum temperature was 20.1 degrees Celsius at the Hong Kong Observatory.


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


Climatological Information for 20 Dec

Regional Weather in Hong Kong

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Bulletin updated at 08:45 HKT 20/Dec/2018

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

A relatively warm easterly airstream is affecting the coast of Guangdong. Locally, temperatures over the territory this morning were generally two degrees or above higher than those of yesterday.

Weather forecast for today

Sunny periods. The maximum temperature will be about 24 degrees. Moderate easterly winds.

Outlook : Warm with sunny periods in the next 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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Bulletin issued at 09:00 HKT 20/Dec/2018

N0 WARNING.

GENERAL SITUATION AT 192100 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= E 4-5. LGT RAIN PATCHES. DOWN TO 4000 M IN MIST PATCHES LATER. SEA UP TO 2 M. SWELL E UP TO 2 M. TEMP 24-21 C. =
KWANGTUNG= E 4-5. LGT RAIN PATCHES. DOWN TO 4000 M IN MIST PATCHES LATER. SEA UP TO 2 M. SWELL E 2 M. =
TAIWAN STRAIT= NE 4-5. FINE. SEA UP TO 2 M. =
BASHI= E 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL E 2-3 M. =
PRATAS= E 4-5, OCNL 6. ISOL SHOWERS LATER. SEA UP TO 3 M. SWELL E 2-3 M. =
BALINTANG= E 5-6, OCNL 7. ISOL SHOWERS. SEA UP TO 4 M. SWELL E 2-3 M. =
SCARBOROUGH= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL E 2-3 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL E TO NE 2-3 M. =
TONKIN= E TO SE 4-5. DOWN TO 2000 M IN MIST OR LGT RAIN PATCHES. SEA UP TO 2 M. =
DANANG= E 4-5. ISOL SHOWERS AND TS. 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
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    • 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 09:30 HKT 20/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 20 December 2018

    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, mist patches later.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 4 to 5, becoming force 6 in east.

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

    Waglan Island Wind northeast force 4
      Visibility 14 Kilometres

    Shantou Wind southwest force 1
      Visibility 5000 Metres

    Dongsha Wind east-northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind east force 1
      Visibility 7 Kilometres

    Xisha Wind northeast force 1
      Visibility 13 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 09:00 HKT 20/DEC/2018
    (Next update at 12:30 HKT 20/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 SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/5-10
       OFFSHORE:  070/15                               21-26
   B.   2000 FT:  150/15-20                            19
   C.   5000 FT:  260/15                               13
   D.  10000 FT:  260/25                               11
   E.  18000 FT:  250/40                               MS5
   F.  24000 FT:  250/45                               MS14
   G.  30000 FT:  260/45                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1100 - 2200 FT.
   I. WEATHER       : 
      SUNNY PERIODS.  LOCALIZED MIST/HAZE AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN MIST/HAZE.
   L. 0 DEG. C LEVEL: 15000 FT
      10 DEG. C LEVEL(S) : 6800, 10800 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS.  MAINLY CLOUDY.
     LOCALIZED MIST LATER.=

    ===================================================================
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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