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Bulletin issued at 11:02 HKT 10/Dec/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 17 degrees Celsius and the relative humidity 77 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.7. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 16 degrees;
Wong Chuk Hang 17 degrees;
Ta Kwu Ling 15 degrees;
Lau Fau Shan 14 degrees;
Tai Po 13 degrees;
Sha Tin 14 degrees;
Tuen Mun 14 degrees;
Tseung Kwan O 16 degrees;
Sai Kung 16 degrees;
Cheung Chau 15 degrees;
Chek Lap Kok 14 degrees;
Tsing Yi 16 degrees;
Shek Kong 14 degrees;
Tsuen Wan Ho Koon 14 degrees;
Tsuen Wan Shing Mun Valley 15 degrees;
Hong Kong Park 17 degrees;
Shau Kei Wan 17 degrees;
Kowloon City 15 degrees;
Happy Valley 17 degrees;
Wong Tai Sin 15 degrees;
Stanley 18 degrees;
Kwun Tong 16 degrees;
Sham Shui Po 15 degrees;
Kai Tak Runway Park 17 degrees;
Yuen Long Park 14 degrees;
Tai Mei Tuk 15 degrees.


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


Climatological Information for 10 Dec

Regional Weather in Hong Kong

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Bulletin updated at 10:45 HKT 10/Dec/2018

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

The northeast monsoon is affecting Guangdong. Meanwhile, a broad band of clouds is bringing rainy weather to the region.

Weather forecast for today

Mainly cloudy with one or two rain patches. Moderate to fresh north to northeasterly winds.

Outlook : Cold and brighter midweek this week.


(The above forecast period is valid up to 23:59 HKT today, 10/12/2018; 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 10/Dec/2018

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT AND TONKIN.

GENERAL SITUATION AT 092100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 100100 UTC:

HONG KONG= N TO NE 5-6, UP TO 7 LATER. RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2 M. TEMP 19-13 C. =
KWANGTUNG= N TO NE 6-7, UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2-3 M. =
TAIWAN STRAIT= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3-4 M. =
BASHI= N TO NE 6-7. CLD. SEA 3-4 M. SWELL NE 2-3 M. =
PRATAS= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
BALINTANG= N TO NE 6-7. CLD. SEA 3-4 M. SWELL NE 2-3 M. =
SCARBOROUGH= N TO NE 6-7. CLD. SEA 3-4 M. SWELL NE 2-3 M. =
PARACEL= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 6-7, UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. =
DANANG= N TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 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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    Bulletin issued at 09:30 HKT 10/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 10 December 2018

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6, becoming up to force 7 later.
    A few rain patches.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    North to northeast force 6 to 7, becoming up to force 8 later.
    Rough seas, becoming very rough later.

    Outlook for the next 48 hours
    North to northeasterly winds of force 7 to 8.

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

    Waglan Island Wind north force 4
      Visibility 35 Kilometres

    Shantou Wind north force 1
      Visibility 30 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind north force 3
      Visibility 9 Kilometres

    Xisha Wind east-northeast force 3
      Visibility 14 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 10/DEC/2018
    (Next update at 12:30 HKT 10/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING GUANGDONG.
     MEANWHILE, A BROAD BAND OF CLOUDS IS BRINGING
     RAINY WEATHER TO THE REGION.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10-15
       OFFSHORE:  030/15-20                            13-19
   B.   2000 FT:  020/15-20                            13
   C.   5000 FT:  130/10                               16
   D.  10000 FT:  300/20                               7
   E.  18000 FT:  230/40                               MS5
   F.  24000 FT:  250/50                               MS16
   G.  30000 FT:  240/60                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1900-2800 FT, 3100-5000 FT
   I. WEATHER       : 
      CLOUDY WITH A FEW RAIN PATCHES. BRIGHT PERIODS
      IN THE AFTERNOON.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 2000 FT
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN RAIN.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 8600 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS.
     MAINLY CLOUDY WITH A FEW RAIN PATCHES.=

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

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

Hong Kong Observatory
Maximum Air Temperature                     18.3 C
Minimum Air Temperature                     16.4 C
Grass Minimum Temperature                   16.6 C
Relative Humidity                        71 - 82 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2152.1 mm
Against an average of                     2377.4 mm

Other Stations                Min                  Max
King's Park                  15.5 C               17.8 C
Wong Chuk Hang               16.3 C               18.1 C
Ta Kwu Ling                  12.3 C               14.4 C
Lau Fau Shan                 12.5 C               15.0 C
Tai Po                       12.3 C               14.6 C
Sha Tin                      14.0 C               16.5 C
Tuen Mun                     13.3 C               15.1 C
Tseung Kwan O                14.9 C               17.7 C
Cheung Chau                  14.7 C               17.5 C
Chek Lap Kok                 14.3 C               16.6 C
Tsing Yi                     15.4 C               18.0 C
Shek Kong                    12.8 C               15.5 C
Tsuen Wan Ho Koon            12.7 C               15.9 C
Tsuen Wan Shing Mun Valley   14.4 C               17.5 C
Hong Kong Park               16.3 C               18.2 C
Shau Kei Wan                 15.6 C               18.5 C
Kowloon City                 14.7 C               17.7 C
Happy Valley                 16.4 C               18.4 C
Wong Tai Sin                 14.6 C               17.9 C
Stanley                      16.3 C               18.6 C
Kwun Tong                    15.2 C               18.3 C
Sham Shui Po                 14.6 C               17.5 C
Kai Tak Runway Park          15.8 C               18.7 C
Yuen Long Park               12.1 C               14.6 C
Tai Mei Tuk               13.7 C               16.6 C

Duration of sunshine (King's Park):              0.5 H
The mean UV index recorded at King's Park yesterday was 0.9,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
 

Yesterday's (09 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                           
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                          0.10
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 09 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <10 Dec 2018> 

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