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Bulletin issued at 10:02 HKT 15/Dec/2018

At 10 a.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 74 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 18 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 17 degrees;
Lau Fau Shan 16 degrees;
Tai Po 17 degrees;
Sha Tin 18 degrees;
Tuen Mun 17 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 18 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 18 degrees;
Tsing Yi 19 degrees;
Shek Kong 17 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 19 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 15 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 09:45 HKT 15/Dec/2018

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

The northeast monsoon affecting the south China coast is moderating gradually.

Weather forecast for today

Sunny periods. Moderate northeasterly winds, occasionally fresh offshore.

Outlook : Mild and mainly fine tomorrow. Slightly cool in the morning and dry early next week.


(The above forecast period is valid up to 23:59 HKT today, 15/12/2018; 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 15/Dec/2018

GALE WARNING AREAS: TAIWAN STRAIT, BASHI, PRATAS, BALINTANG, SCARBOROUGH AND PARACEL.

GENERAL SITUATION AT 142100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 150100 UTC:

HONG KONG= NE 5-6. CLD. SEA 2-3 M. SWELL NE 2-3 M. TEMP 21-18 C. =
KWANGTUNG= NE 6-7. CLD. SEA 3-4 M. SWELL NE 3 M. =
TAIWAN STRAIT= NE 6-7, UP TO 8 AT FIRST. CLD. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL NE 3-5 M. =
BASHI= E TO NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 3-5 M. =
PRATAS= E TO NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 3-5 M. =
BALINTANG= E TO NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 3-5 M. =
SCARBOROUGH= NE 6-7, UP TO 8 AT FIRST. LGT RAIN PATCHES. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL NE 3-5 M. =
PARACEL= NE 6-7, OCNL 8. LGT RAIN PATCHES. SEA UP TO 6 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
DANANG= NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 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

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    Bulletin issued at 09:30 HKT 15/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 15 December 2018

    Warnings:
    Gale force winds in Nan'ao. Strong winds in Hong Kong adjacent waters, Shanwei, south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 5 to 6.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 6 to 7, occasionally force 8.
    Rough to very rough seas.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    Northeast force 6 to 7.
    Rough seas.

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

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

    Waglan Island Wind north-northeast force 4
      Visibility 13 Kilometres

    Shantou Wind south-southwest force 1
      Visibility 27 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind north force 2
      Visibility 9 Kilometres

    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 09:30 HKT 15/DEC/2018
    (Next update at 12:30 HKT 15/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON AFFECTING THE SOUTH CHINA
     COAST IS MODERATING GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  050/10
       OFFSHORE:  030/15-20                            16-21
   B.   2000 FT:  070/10-15                            14
   C.   5000 FT:  100/10                               12
   D.  10000 FT:  260/15                               10
   E.  18000 FT:  260/10                               MS2
   F.  24000 FT:  270/20                               MS14
   G.  30000 FT:  250/20                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2600-3600 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH SUNNY INTERVALS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 6000, 8000, 10000 FT
   M. TURBULENCE    : MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHEASTERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE. MAINLY CLOUDY.=

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

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

Hong Kong Observatory
Maximum Air Temperature                     18.2 C
Minimum Air Temperature                     15.5 C
Grass Minimum Temperature                   15.3 C
Relative Humidity                        68 - 76 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2381.7 mm

Other Stations                Min                  Max
King's Park                  14.7 C               17.7 C
Wong Chuk Hang               15.7 C               19.7 C
Ta Kwu Ling                  12.5 C               16.4 C
Lau Fau Shan                 12.5 C               16.0 C
Tai Po                       12.5 C               16.0 C
Sha Tin                      13.9 C               16.8 C
Tuen Mun                     13.4 C               16.4 C
Tseung Kwan O                14.6 C               17.3 C
Sai Kung                     14.6 C               17.6 C
Cheung Chau                  14.3 C               19.9 C
Chek Lap Kok                 14.0 C               18.0 C
Tsing Yi                     15.5 C               18.5 C
Shek Kong                    12.8 C               16.5 C
Tsuen Wan Ho Koon            13.0 C               17.0 C
Tsuen Wan Shing Mun Valley   14.7 C               18.0 C
Hong Kong Park               15.8 C               18.4 C
Shau Kei Wan                 14.8 C               17.5 C
Kowloon City                 14.2 C               17.4 C
Happy Valley                 16.0 C               18.7 C
Wong Tai Sin                 14.4 C               17.4 C
Stanley                      15.4 C               18.9 C
Kwun Tong                    14.9 C               17.4 C
Sham Shui Po                 14.6 C               17.7 C
Kai Tak Runway Park          16.0 C               18.4 C
Yuen Long Park               12.7 C               16.3 C
Tai Mei Tuk               13.4 C               17.0 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (14 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                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.10
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 14 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <15 Dec 2018> 

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