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Bulletin issued at 23:02 HKT 09/Dec/2018

At 11 p.m. at the Hong Kong Observatory the air temperature was 16 degrees Celsius and the relative humidity 75 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 9 Dec

Regional Weather in Hong Kong

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Bulletin updated at 23:15 HKT 09/Dec/2018

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

The northeast monsoon brought cool weather to the coast of Guangdong today. Meanwhile, a rainband affected Guangdong. Locally, it was cloudy with one or two rain patches. Temperatures over the New Territories generally fell to 13 degrees or below in the morning. The northeast monsoon is expected to persist over Guangdong in the next few days.

Weather forecast for Hong Kong (Monday, 10 Dec 2018)

Mainly cloudy. Rather cool with one or two rain patches in the morning. The minimum temperature will be about 13 degrees in the urban areas, and a few degrees lower in the New Territories. Bright periods during the day with a maximum temperature of around 18 degrees. 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 tomorrow, 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 21:00 HKT 09/Dec/2018

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

GENERAL SITUATION AT 090900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 091300 UTC:

HONG KONG= N TO NE 5-6, OCNL 7. RAIN PATCHES. SEA UP TO 4 M. SWELL N TO NE 2 M. TEMP 13-18 C. =
KWANGTUNG= N TO NE 6-7, UP TO 8 AT FIRST. RAIN PATCHES. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL N TO NE 2-3 M. =
TAIWAN STRAIT= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 3-4 M. =
BASHI= N TO NE 6-7, UP TO 8 AT FIRST. CLD. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL N TO NE 3-4 M. =
PRATAS= N TO NE 6-7, UP TO 8 AT FIRST. LGT RAIN PATCHES. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL N TO NE 3-4 M. =
BALINTANG= N TO NE 6-7, UP TO 8 AT FIRST. LGT RAIN PATCHES. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL N TO NE 3-4 M. =
SCARBOROUGH= N TO NE 6-7, UP TO 8 AT FIRST. CLD. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL N TO NE 3-4 M. =
PARACEL= N TO NE 6-7, UP TO 8 AT FIRST. RAIN PATCHES. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL N TO NE 2-3 M. =
TONKIN= N TO NE 6-7, UP TO 8 AT FIRST. RAIN PATCHES. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL N TO NE 2-3 M. =
DANANG= N TO NE 6-7, UP TO 8 AT FIRST. RAIN PATCHES. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL N TO NE 3-4 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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    Bulletin issued at 23:30 HKT 09/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 09 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, occasionally force 7.
    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, up to force 8 at first.
    Rough seas, very rough at first.

    Outlook for the next 48 hours
    North to northeasterly winds of force 6 to 7, becoming force 8.

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

    Waglan Island Wind north-northeast force 3
      Visibility 20 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Xisha Wind east-northeast force 3
      Visibility 13 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 09/DEC/2018
    (Next update at 01:30 HKT 10/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.  MEANWHILE, A RAINBAND IS
     AFFECTING GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10-15
       OFFSHORE:  020/15-20, OCNL 25                   16-12
   B.   2000 FT:  090/15-20, OCNL 25                   10
   C.   5000 FT:  030/10                               12
   D.  10000 FT:  230/10                               5
   E.  18000 FT:  250/45                               MS7
   F.  24000 FT:  240/55                               MS16
   G.  30000 FT:  250/65                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1900 - 2800 FT.
   I. WEATHER       : 
      CLOUDY WITH A FEW RAIN PATCHES.  LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 2500 FT  BKN 8000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 13000 FT
      10 DEG. C LEVEL(S) : 2000, 7400 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-3.0 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 09/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     19.7 C
Minimum Air Temperature                     16.7 C
Grass Minimum Temperature                   17.9 C
Relative Humidity                        71 - 82 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.1 mm
Against an average of                     2377.0 mm

Other Stations                Min                  Max
King's Park                  15.8 C               19.6 C
Wong Chuk Hang               16.7 C               19.5 C
Ta Kwu Ling                  13.4 C               18.1 C
Lau Fau Shan                 14.0 C               18.6 C
Tai Po                       13.9 C               18.1 C
Sha Tin                      14.9 C               18.6 C
Tuen Mun                     14.9 C               18.3 C
Tseung Kwan O                15.3 C               18.8 C
Cheung Chau                  15.3 C               19.9 C
Chek Lap Kok                 15.2 C               19.0 C
Tsing Yi                     16.2 C               19.4 C
Shek Kong                    13.9 C               18.3 C
Tsuen Wan Ho Koon            13.4 C               17.8 C
Tsuen Wan Shing Mun Valley   15.2 C               19.7 C
Hong Kong Park               16.8 C               21.1 C
Shau Kei Wan                 15.6 C               19.3 C
Kowloon City                 15.0 C               19.5 C
Happy Valley                 16.8 C               20.2 C
Wong Tai Sin                 15.4 C               19.3 C
Stanley                      16.7 C               19.1 C
Kwun Tong                    15.5 C               18.3 C
Sham Shui Po                 15.6 C               19.6 C
Kai Tak Runway Park          16.3 C               19.7 C
Yuen Long Park               14.1 C               18.1 C
Tai Mei Tuk               14.8 C               20.1 C

Duration of sunshine (King's Park):              0.2 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 4.
 

Yesterday's (08 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 08 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <09 Dec 2018> 

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