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Bulletin issued at 01:02 HKT 19/Dec/2018

At 1 a.m. at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 77 per cent.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 17 degrees;
Tai Po 19 degrees;
Sha Tin 19 degrees;
Tuen Mun 19 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 19 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 19 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 19 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 18 degrees;
Happy Valley 19 degrees;
Wong Tai Sin 19 degrees;
Stanley 19 degrees;
Kwun Tong 18 degrees;
Sham Shui Po 19 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 17 degrees;
Tai Mei Tuk 18 degrees.


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


Climatological Information for 19 Dec

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 00:45 HKT 19/Dec/2018

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

A dry northeast monsoon brought generally fine weather to southern China yesterday. Locally, it was fine and dry. The relative humidity over most parts of the territory once fell below 50 per cent in the afternoon. Under the influence of a relatively warm and humid easterly airstream, temperatures will rise gradually over the coast of Guangdong in the next couple of days.

Weather forecast for Hong Kong

Mainly cloudy. The minimum temperature will be about 18 degrees in the urban areas, and a couple of degrees lower in the New Territories. Sunny intervals during the day with a maximum temperature of around 22 degrees. There will be a few light rain patches on Wednesday night. Moderate easterly winds, fresh offshore at first.

Outlook : Temperatures rising in the following couple of days and it will be warm with sunny periods during the day.


(The above forecast period is valid up to 23:59 HKT today, 19/12/2018; 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 18/Dec/2018

GALE WARNING AREAS: BASHI, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 180900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 181300 UTC:

HONG KONG= E 4-5, UP TO 6 AT FIRST. CLD. LIGHT RAIN PATCHES LATER. SEA UP TO 2 M, 3 M AT FIRST. SWELL NE 2 M. TEMP 17-21 C. =
KWANGTUNG= E 5-6, UP TO 7 IN E. CLD. LGT RAIN PATCHES LATER. SEA 2-3 M, UP TO 4 M IN E. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 6-7. FINE. SEA 3-4 M. SWELL NE 2-3 M. =
BASHI= E TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 3-4 M. =
PRATAS= E TO NE 6-7. CLD. SEA 3-4 M. SWELL NE 3 M. =
BALINTANG= E TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 3-4 M. =
SCARBOROUGH= NE 6-7, OCNL 8. CLD. SEA UP TO 6 M. SWELL NE 3-4 M. =
PARACEL= NE 5-6, OCNL 7. CLD. SEA UP TO 4 M. SWELL NE 3-4 M. =
TONKIN= E TO NE 4-5. CLD. SEA UP TO 2 M. SWELL NE UP TO 2 M. =
DANANG= E TO NE 5-6. CLD. SEA 2-3 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
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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
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    Bulletin issued at 23:30 HKT 18/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 18 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 force 4 to 5, up to force 6 at first.
    A few light rain patches later.
    Moderate seas, rough at first.

    Nan'ao:
    East to northeast force 6 to 7.
    Rough seas.

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

    Outlook for the next 48 hours
    Easterly winds of force 5 to 6.

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

    Waglan Island Wind east-northeast force 5
      Visibility 17 Kilometres

    Shantou Wind calm
      Visibility 25 Kilometres

    Huangmaozhou Wind east force 6

    Xisha Wind east-northeast force 3
      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 01:30 HKT 19/DEC/2018
    (Next update at 9:00-9:30 HKT 19/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 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
       OFFSHORE:  080/20                               16-22
   B.   2000 FT:  100/15-20                            12
   C.   5000 FT:  180/10                               12
   D.  10000 FT:  280/20                               7
   E.  18000 FT:  270/30                               MS3
   F.  24000 FT:  280/30                               MS16
   G.  30000 FT:  270/50                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2300-2800 FT
   I. WEATHER       : 
      MAINLY CLOUDY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT SCT 5000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 6000 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS. MAINLY CLOUDY.
     SUNNY INTERVALS DURING THE DAY.=

    ===================================================================
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 19/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     20.2 C
Minimum Air Temperature                     16.2 C
Grass Minimum Temperature                   12.4 C
Relative Humidity                        44 - 75 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2385.1 mm

Other Stations                Min                  Max
King's Park                  14.6 C               20.8 C
Wong Chuk Hang               12.6 C               20.5 C
Ta Kwu Ling                   7.0 C               22.1 C
Lau Fau Shan                 11.5 C               23.9 C
Tai Po                       11.2 C               19.7 C
Sha Tin                      10.1 C               21.0 C
Tuen Mun                     13.9 C               22.8 C
Tseung Kwan O                11.6 C               21.0 C
Sai Kung                     13.5 C               19.6 C
Cheung Chau                  13.4 C               21.9 C
Chek Lap Kok                 14.1 C               22.6 C
Tsing Yi                     13.6 C               21.4 C
Shek Kong                     9.7 C               22.3 C
Tsuen Wan Ho Koon            11.9 C               22.0 C
Tsuen Wan Shing Mun Valley   11.5 C               22.0 C
Hong Kong Park               14.9 C               21.3 C
Shau Kei Wan                 14.1 C               20.2 C
Kowloon City                 14.9 C               21.8 C
Happy Valley                 12.6 C               20.5 C
Wong Tai Sin                 14.1 C               21.3 C
Stanley                      15.6 C               19.9 C
Kwun Tong                    15.0 C               20.1 C
Sham Shui Po                 13.4 C               22.7 C
Kai Tak Runway Park          15.9 C               19.7 C
Yuen Long Park                9.3 C               23.6 C
Tai Mei Tuk               12.9 C               21.2 C

Duration of sunshine (King's Park):              8.5 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 (18 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                           0.13
Sai Wan Ho                          0.09
King's Park                         0.15
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 18 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <19 Dec 2018> 

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