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Bulletin issued at 10:02 HKT 13/Dec/2018

At 10 a.m. at the Hong Kong Observatory the air temperature was 15 degrees Celsius and the relative humidity 68 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 15 degrees;
Wong Chuk Hang 17 degrees;
Ta Kwu Ling 13 degrees;
Lau Fau Shan 13 degrees;
Tai Po 13 degrees;
Sha Tin 14 degrees;
Tuen Mun 13 degrees;
Tseung Kwan O 16 degrees;
Sai Kung 14 degrees;
Cheung Chau 15 degrees;
Chek Lap Kok 14 degrees;
Tsing Yi 15 degrees;
Shek Kong 13 degrees;
Tsuen Wan Ho Koon 13 degrees;
Tsuen Wan Shing Mun Valley 16 degrees;
Hong Kong Park 16 degrees;
Shau Kei Wan 17 degrees;
Kowloon City 16 degrees;
Happy Valley 17 degrees;
Wong Tai Sin 16 degrees;
Stanley 16 degrees;
Kwun Tong 16 degrees;
Sham Shui Po 16 degrees;
Kai Tak Runway Park 16 degrees;
Yuen Long Park 13 degrees;
Tai Mei Tuk 15 degrees.


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


Climatological Information for 13 Dec

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 09:45 HKT 13/Dec/2018

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

The northeast monsoon is bringing generally cold weather to southern China. Temperatures over inland Guangdong stayed around 10 degrees this morning.

Weather forecast for today

Sunny intervals. It will be cool and dry. Moderate northerly winds, fresh offshore.

Outlook : Temperatures rising gradually in the next couple of days. Mainly fine over the weekend and early next week.


(The above forecast period is valid up to 23:59 HKT today, 13/12/2018; 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 13/Dec/2018

GALE WARNING AREAS: HONG KONG, KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG, SCARBOROUGH, PARACEL, TONKIN AND DANANG.

GENERAL SITUATION AT 122100 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 130100 UTC:

HONG KONG= N TO NE 6-7, OCNL 8. LGT RAIN PATCHES. SEA UP TO 6 M. SWELL N TO NE 2-3 M. TEMP 17-15 C. =
KWANGTUNG= N TO NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 3-5 M. =
TAIWAN STRAIT= N TO NE 7-8. FINE. SEA 4-6 M. SWELL N TO NE 3-5 M. =
BASHI= N TO NE 7-8. RAIN PATCHES. SEA 6 M. SWELL N TO NE 3-5 M. =
PRATAS= N TO NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 3-5 M. =
BALINTANG= N TO NE 8. RAIN PATCHES. SEA 6 M. SWELL N TO NE 3-5 M. =
SCARBOROUGH= N TO NE 8. LGT RAIN PATCHES LATER. SEA 6 M. SWELL N TO NE 3-5 M. =
PARACEL= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 3-5 M. =
TONKIN= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 2-3 M. =
DANANG= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 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

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

    Bulletin issued at 09:30 HKT 13/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 13 December 2018

    Warnings:
    Gale force winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 6 to 7, occasionally force 8.
    A few light rain patches.
    Rough to very rough seas.

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

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

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

    Waglan Island Wind north force 5
      Visibility 19 Kilometres

    Dongsha Wind northeast force 4
      Visibility 9 Kilometres in rain

    Huangmaozhou Wind northeast force 4

    Macau Wind north force 4
      Visibility 9 Kilometres

    Xisha Wind northeast force 3
      Visibility 16 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 13/DEC/2018
    (Next update at 12:30 HKT 13/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON 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:  010/10-15
       OFFSHORE:  010/15-20, OCNL 25                   12-17
   B.   2000 FT:  060/15-20, OCNL 25                   10
   C.   5000 FT:  220/15                               13
   D.  10000 FT:  280/20                               9
   E.  18000 FT:  230/25                               MS5
   F.  24000 FT:  250/45                               MS13
   G.  30000 FT:  260/40                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2100-2700 FT, 3500-4800 FT
   I. WEATHER       : 
      BRIGHT PERIODS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 2000, 6600, 8600,9400 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS.  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 13/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     16.5 C
Minimum Air Temperature                     13.7 C
Grass Minimum Temperature                   13.7 C
Relative Humidity                        62 - 72 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2379.8 mm

Other Stations                Min                  Max
King's Park                  12.8 C               15.9 C
Wong Chuk Hang               14.1 C               17.2 C
Ta Kwu Ling                  10.8 C               15.3 C
Lau Fau Shan                 11.0 C               14.3 C
Tai Po                       10.9 C               14.5 C
Sha Tin                      11.7 C               15.2 C
Tuen Mun                     11.9 C               14.4 C
Tseung Kwan O                12.5 C               15.9 C
Sai Kung                     12.5 C               15.3 C
Cheung Chau                  12.2 C               15.4 C
Chek Lap Kok                 12.2 C               15.1 C
Tsing Yi                     13.2 C               15.3 C
Shek Kong                    11.3 C               15.3 C
Tsuen Wan Ho Koon            10.4 C               14.0 C
Tsuen Wan Shing Mun Valley   12.4 C               15.9 C
Hong Kong Park               14.1 C               16.3 C
Shau Kei Wan                 13.3 C               16.8 C
Kowloon City                 12.2 C               15.0 C
Happy Valley                 14.2 C               17.6 C
Wong Tai Sin                 12.5 C               15.3 C
Stanley                      14.4 C               17.7 C
Kwun Tong                    12.8 C               16.3 C
Sham Shui Po                 12.8 C               16.0 C
Kai Tak Runway Park          13.3 C               16.2 C
Tai Mei Tuk               12.1 C               15.9 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 (12 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                         0.15
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 12 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <13 Dec 2018> 

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