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Bulletin issued at 00:02 HKT 05/Dec/2018

At midnight at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 81 per cent.

The air temperatures at other places were:

King's Park 24 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 22 degrees;
Tai Po 22 degrees;
Sha Tin 22 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 22 degrees;
Sai Kung 23 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 23 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 24 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 24 degrees;
Stanley 24 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 22 degrees;
Tai Mei Tuk 23 degrees.


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


Climatological Information for 5 Dec

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 00:00 HKT 05/Dec/2018

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

The weather was generally fine over southeastern China yesterday. Locally, it was mainly fine and warm. Besides, pressure is rising over eastern China. A fresh to strong easterly airstream is expected to reach the coast of Guangdong today.

Weather forecast for Hong Kong (Wednesday, 5 Dec 2018)

Becoming cloudy. Visibility relatively low in some areas at first. One or two rain patches later. Temperatures will range between 22 and 25 degrees. Light winds, strengthening gradually from the east later.

Outlook : Mainly cloudy on Thursday. Temperatures dropping significantly on Friday and over the weekend.


(The above forecast period is valid up to 23:59 HKT today, 05/12/2018; 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 04/Dec/2018

N0 WARNING.

GENERAL SITUATION AT 040900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 041300 UTC:

HONG KONG= E TO NE 4, BEC 5-6. DOWN TO 4000 M IN MIST PATCHES AT FIRST. ONE OR TWO RAIN PATCHES TOMORROW. SEA BEC 2-3 M. TEMP 21-24 C. =
KWANGTUNG= E TO NE 4-5, BEC UP TO 7. DOWN TO 4000 M IN MIST PATCHES AT FIRST. ONE OR TWO RAIN PATCHES TOMORROW. SEA UP TO 2 M, BEC 4 M. =
TAIWAN STRAIT= NE 5-6, BEC 7. DOWN TO 4000 M IN MIST OR RAIN PATCHES AT FIRST. SEA 2-3 M, BEC 4 M. =
BASHI= E TO NE 5-6, UP TO 7 LATER. FINE. SEA 2-3 M, UP TO 4 M LATER. SWELL E TO NE 2 M. =
PRATAS= E TO NE 5-6, BEC UP TO 7. FINE. SEA 2-3 M, BEC 4 M. SWELL E TO NE 2 M. =
BALINTANG= E 5-6, UP TO 7 LATER. FINE. SEA 2-3 M, UP TO 4 M LATER. SWELL E TO NE 2 M. =
SCARBOROUGH= E TO NE 4-5, UP TO 6 LATER. FINE. SEA UP TO 2 M, UP TO 3 M LATER. SWELL E TO NE 2 M. =
PARACEL= E TO NE 4-5, UP TO 6 LATER. FINE. SEA UP TO 2 M, UP TO 3 M LATER. =
TONKIN= E TO NE 4-5. RAIN PATCHES AT FIRST. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. RAIN PATCHES AT FIRST. SEA UP TO 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
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    Bulletin issued at 23:30 HKT 04/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 04 December 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4, becoming force 5 to 6.
    One or two rain patches, visibility relatively low in some areas at first.
    Moderate seas, becoming rough.

    Nan'ao:
    East to northeast force 6 to 7.
    Rough seas.

    Shanwei and South of Hong Kong:
    East to northeast force 5 to 6, becoming up to force 7.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 4 to 5, becoming force 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6, up to force 7 at first, becoming north to northeasterly winds of force 6 to 7 later.

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

    Waglan Island Wind north force 2
      Visibility 34 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 16 Kilometres

    Huangmaozhou Wind east force 3

    Xisha Wind northeast force 2
      Visibility 22 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 17:30 HKT 04/DEC/2018
    (Next update at 01:30 HKT 05/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/5-10                             26-21
   B.   2000 FT:  090/10                               19
   C.   5000 FT:  100/10                               16
   D.  10000 FT:  230/20                               10
   E.  18000 FT:  270/20                               MS4
   F.  24000 FT:  270/40                               MS14
   G.  30000 FT:  230/55                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4400-5000 FT
   I. WEATHER       : 
      BECOMING CLOUDY.
      A FEW RAIN PATCHES AND LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT SCT 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3500 M IN RAIN /MIST.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS.
     MAINLY CLOUDY WITH A FEW RAIN PATCHES.
     LOCALISED MIST AT FIRST.=

    ===================================================================
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.

    sigmet
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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 05/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.1 C
Minimum Air Temperature                     22.7 C
Grass Minimum Temperature                   19.8 C
Relative Humidity                        70 - 84 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January            2151 mm
Against an average of                     2373.8 mm

Other Stations                Min                  Max
King's Park                  21.5 C               29.3 C
Wong Chuk Hang               20.4 C               29.5 C
Ta Kwu Ling                  17.8 C               29.9 C
Lau Fau Shan                 20.0 C               28.2 C
Tai Po                       19.8 C               26.7 C
Sha Tin                      19.6 C               28.5 C
Tuen Mun                     20.8 C               29.9 C
Tseung Kwan O                19.7 C               29.4 C
Sai Kung                     21.0 C               27.8 C
Cheung Chau                  20.5 C               28.7 C
Chek Lap Kok                 21.8 C               28.0 C
Tsing Yi                     21.1 C               29.3 C
Shek Kong                    18.9 C               28.2 C
Tsuen Wan Ho Koon            19.9 C               28.4 C
Tsuen Wan Shing Mun Valley   19.9 C               30.0 C
Hong Kong Park               21.3 C               28.3 C
Shau Kei Wan                 22.0 C               28.1 C
Kowloon City                 21.7 C               30.0 C
Happy Valley                 20.2 C               29.7 C
Wong Tai Sin                 21.1 C               29.9 C
Stanley                      22.0 C               27.7 C
Kwun Tong                    22.0 C               29.1 C
Sham Shui Po                 21.7 C               29.8 C
Kai Tak Runway Park          22.4 C               28.2 C
Yuen Long Park               19.0 C               29.9 C
Tai Mei Tuk               20.8 C               29.2 C

Duration of sunshine (King's Park):              9.1 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 6.
 

Yesterday's (04 Dec 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.14 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                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14

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 04 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <05 Dec 2018> 

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