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Bulletin issued at 05:02 HKT 12/Dec/2018

At 5 a.m. at the Hong Kong Observatory the air temperature was 15 degrees Celsius and the relative humidity 69 per cent.

The air temperatures at other places were:

King's Park 14 degrees;
Wong Chuk Hang 15 degrees;
Ta Kwu Ling 12 degrees;
Lau Fau Shan 11 degrees;
Tai Po 12 degrees;
Sha Tin 12 degrees;
Tuen Mun 12 degrees;
Tseung Kwan O 13 degrees;
Sai Kung 13 degrees;
Cheung Chau 12 degrees;
Chek Lap Kok 12 degrees;
Tsing Yi 13 degrees;
Shek Kong 12 degrees;
Tsuen Wan Ho Koon 11 degrees;
Tsuen Wan Shing Mun Valley 13 degrees;
Hong Kong Park 15 degrees;
Shau Kei Wan 14 degrees;
Kowloon City 13 degrees;
Happy Valley 15 degrees;
Wong Tai Sin 13 degrees;
Stanley 15 degrees;
Kwun Tong 14 degrees;
Sham Shui Po 14 degrees;
Kai Tak Runway Park 14 degrees;
Yuen Long Park 12 degrees;
Tai Mei Tuk 13 degrees.


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


Climatological Information for 12 Dec

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 04:45 HKT 12/Dec/2018

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

The northeast monsoon is bringing cold weather to southern China. Locally, temperatures over most parts of the territory this morning were three to four degrees lower than those of yesterday.

Weather forecast for today

Sunny intervals. Rather cool in the morning and at night. Dry during the day. The maximum temperature will be about 18 degrees. Moderate to fresh northerly winds, occasionally strong offshore and on high ground at first.

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, 12/12/2018; 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 11/Dec/2018

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

GENERAL SITUATION AT 110900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 111300 UTC:

HONG KONG= N 6-7. CLD. SEA 3-4 M. SWELL NE 2 M. TEMP 13-17 C. =
KWANGTUNG= N TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= N TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 3-4 M. =
BASHI= N TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 3-4 M. =
PRATAS= N TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 2-3 M. =
BALINTANG= N TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 3-4 M. =
SCARBOROUGH= N TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 2-3 M. =
PARACEL= N TO NE 6-7, OCNL 8. LGT RAIN PATCHES. SEA UP TO 6 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. =
DANANG= N TO NE 6-7, OCNL 8. RAIN PATCHES. SEA UP TO 6 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
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    Bulletin issued at 05:30 HKT 12/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 12 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 force 6 to 7.
    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 50 Kilometres or above

    Shantou Wind west-southwest force 1
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 5

    Macau Wind north force 3
      Visibility 35 Kilometres

    Xisha Wind northeast force 4
      Visibility 9 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 12/DEC/2018
    (Next update at 9:00-9:30 HKT 12/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 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/15, OCNL 20
       OFFSHORE:  360/20-25, OCNL 30                   11-15
   B.   2000 FT:  360/25-30                            12
   C.   5000 FT:  010/5-10                             12
   D.  10000 FT:  250/10                               7
   E.  18000 FT:  250/35                               MS5
   F.  24000 FT:  250/45                               MS16
   G.  30000 FT:  260/55                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1700-3200 FT.
   I. WEATHER       : 
      MAINLY CLOUDY AT FIRST, SUNNY INTERVALS DURING
      THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 8200 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.5-4.0 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE AND ON HIGH GROUNDS.  SUNNY
     INTERVALS.=

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

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

Hong Kong Observatory
Maximum Air Temperature                     20.4 C
Minimum Air Temperature                     16.5 C
Grass Minimum Temperature                   15.0 C
Relative Humidity                        59 - 77 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2378.4 mm

Other Stations                Min                  Max
King's Park                  15.8 C               20.7 C
Wong Chuk Hang               16.1 C               22.4 C
Ta Kwu Ling                  12.7 C               19.1 C
Lau Fau Shan                 13.0 C               18.3 C
Tai Po                       13.0 C               18.1 C
Sha Tin                      13.5 C               19.3 C
Tuen Mun                     13.9 C               19.0 C
Tseung Kwan O                15.0 C               22.0 C
Sai Kung                     14.7 C               19.2 C
Cheung Chau                  14.2 C               21.6 C
Chek Lap Kok                 14.3 C               18.7 C
Tsing Yi                     15.0 C               20.0 C
Shek Kong                    13.3 C               19.8 C
Tsuen Wan Ho Koon            13.0 C               18.0 C
Tsuen Wan Shing Mun Valley   14.6 C               22.0 C
Hong Kong Park               16.3 C               21.5 C
Shau Kei Wan                 15.1 C               21.3 C
Kowloon City                 14.8 C               20.7 C
Happy Valley                 16.5 C               22.2 C
Wong Tai Sin                 14.3 C               20.9 C
Stanley                      16.6 C               23.4 C
Kwun Tong                    14.4 C               22.1 C
Sham Shui Po                 15.5 C               21.9 C
Kai Tak Runway Park          15.1 C               21.5 C
Yuen Long Park               13.5 C               19.7 C
Tai Mei Tuk               13.9 C               20.4 C

Duration of sunshine (King's Park):              4.9 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 6.
 

Yesterday's (11 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                          0.10
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 11 Dec
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