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Bulletin issued at 11:02 HKT 25/Dec/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 82 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 19 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 18 degrees;
Lau Fau Shan 18 degrees;
Tai Po 18 degrees;
Sha Tin 19 degrees;
Tuen Mun 18 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 19 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 19 degrees;
Tsing Yi 19 degrees;
Shek Kong 18 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 19 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 19 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 20 degrees;
Stanley 19 degrees;
Kwun Tong 19 degrees;
Sham Shui Po 19 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 17 degrees;
Tai Mei Tuk 19 degrees.


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


Climatological Information for 25 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Local Weather Forecast

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Bulletin updated at 10:45 HKT 25/Dec/2018

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

The northeast monsoon is affecting the coastal areas of Guangdong. Meanwhile, an area of low pressure is bringing unsettled weather to the western North Pacific east of the Philippines.

Weather forecast for today

Mainly cloudy. Bright periods during the day. Moderate east to northeasterly winds, fresh offshore at first.

Outlook : Warm with sunny periods during the day in the next couple of days. Temperatures falling significantly and it will be windy with rain in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 25/12/2018; 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 25/Dec/2018

GALE WARNING AREAS: TAIWAN STRAIT, BASHI AND BALINTANG.

GENERAL SITUATION AT 242100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= E TO NE 5-6, OCNL 7. CLD. SEA UP TO 4 M. SWELL NE 2 M. TEMP 22-19 C. =
KWANGTUNG= E TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 6-7, 8 AT FIRST. RAIN PATCHES. SEA 3-4 M, 6 M AT FIRST. SWELL NE 3-4 M. =
BASHI= E TO NE 6-7, 8 AT FIRST. RAIN PATCHES. SEA 3-4 M, 6 M AT FIRST. SWELL NE 3-4 M. =
PRATAS= E TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 3 M. =
BALINTANG= E TO NE 6-7, 8 AT FIRST. RAIN PATCHES. SEA 3-4 M, 6 M AT FIRST. SWELL NE 3-4 M. =
SCARBOROUGH= E TO NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 3 M. =
PARACEL= E TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
TONKIN= E TO NE 5-6. CLD. SEA 2-3 M. SWELL NE 2 M. =
DANANG= E TO NE 6-7. RAIN PATCHES. 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 09:30 HKT 25/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 25 December 2018

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5 to 6, occasionally force 7.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East to northeast force 6 to 7.
    Rough seas.

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

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

    Waglan Island Wind east-northeast force 5
      Visibility 16 Kilometres

    Shantou Wind southeast force 1
      Visibility 10 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind north force 2
      Visibility 2700 Metres in mist

    Xisha Wind east-northeast force 2
      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 25/DEC/2018
    (Next update at 12:30 HKT 25/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 COASTAL
     AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/10
       OFFSHORE:  080/20-25                            16-21
   B.   2000 FT:  100/15-20                            13
   C.   5000 FT:  200/10                               15
   D.  10000 FT:  220/25                               10
   E.  18000 FT:  280/25                               0
   F.  24000 FT:  260/25                               MS13
   G.  30000 FT:  290/30                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2300-3700 FT
   I. WEATHER       : 
      MAINLY CLOUDY. BRIGHT PERIODS IN THE AFTERNOON.
      LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT  BKN 6000 FT.
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN MIST.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 7000, 8400, 10000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE. MOD NEAR HILLS.
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS, FRESH
     OFFSHORE. 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 25/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     19.0 C
Minimum Air Temperature                     16.8 C
Grass Minimum Temperature                   16.8 C
Relative Humidity                        80 - 92 Percent
Rainfall                                     0.1 mm 
Total rainfall since 1st January          2162.9 mm
Against an average of                     2388.6 mm

Other Stations                Min                  Max
King's Park                  16.2 C               18.6 C
Wong Chuk Hang               16.8 C               18.9 C
Ta Kwu Ling                  14.8 C               17.3 C
Lau Fau Shan                 14.6 C               17.7 C
Tai Po                       14.7 C               16.9 C
Sha Tin                      15.9 C               17.7 C
Tuen Mun                     15.4 C               17.8 C
Tseung Kwan O                15.9 C               18.2 C
Sai Kung                     15.9 C               18.2 C
Cheung Chau                  15.3 C               18.6 C
Chek Lap Kok                 15.8 C               19.1 C
Tsing Yi                     16.4 C               18.9 C
Shek Kong                    14.8 C               17.2 C
Tsuen Wan Ho Koon            14.5 C               17.7 C
Tsuen Wan Shing Mun Valley   15.7 C               18.5 C
Hong Kong Park               16.6 C               18.8 C
Shau Kei Wan                 16.6 C               18.4 C
Kowloon City                 15.8 C               18.1 C
Happy Valley                 17.3 C               18.9 C
Wong Tai Sin                 16.8 C               19.2 C
Stanley                      17.3 C               18.5 C
Kwun Tong                    16.2 C               18.2 C
Sham Shui Po                 16.0 C               18.7 C
Kai Tak Runway Park          17.2 C               19.0 C
Yuen Long Park               14.8 C               17.5 C
Tai Mei Tuk               15.2 C               18.0 C

Duration of sunshine (King's Park):              0.0 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 2.
 

Yesterday's (24 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                         0.11
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 24 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Dec 2018> 

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