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Bulletin issued at 00:02 HKT 26/Dec/2018

At midnight at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 83 per cent.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 19 degrees;
Tai Po 19 degrees;
Sha Tin 20 degrees;
Tuen Mun 19 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 19 degrees;
Cheung Chau 18 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 20 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 18 degrees;
Tsuen Wan Shing Mun Valley 19 degrees;
Hong Kong Park 20 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 19 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 20 degrees;
Stanley 19 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 20 degrees;
Yuen Long Park 19 degrees;
Tai Mei Tuk 19 degrees.


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


Climatological Information for 26 Dec

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 00:00 HKT 26/Dec/2018

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

The northeast monsoon that affected Guangdong moderated gradually yesterday. Meanwhile, a band of clouds covered southern China. Locally, there were one or two light rain patches yesterday morning and bright periods during the day. The band of clouds is expected to thin out gradually, the weather will improve over the region today and tomorrow. An intense winter monsoon will reach the south China coast in the latter part of this week. Temperatures will fall significantly over the region and it will be windy. The weather will be cold with rain early next week.

Besides, the area of low pressure to the east of the Philippines intensified into a tropical depression last night. At 11 p.m. last night, the tropical depression was centred about 1590 kilometres east-southeast of Manila. It is forecast to move west-northwest at about 18 kilometres per hour in the general direction of the central part of the Philippines.

Weather forecast for Hong Kong (Wednesday, 26 Dec 2018)

Cloudy with relatively low visibility in some areas at first. The minimum temperature will be around 19 degrees. Mainly fine and warm during the day with a maximum temperature of about 24 degrees. Light to moderate northeasterly winds.

Outlook : Mainly fine on Thursday. Temperatures falling significantly and it will be windy in the latter part of this week. The weather will be cold with a few rain patches early next week.


(The above forecast period is valid up to 23:59 HKT today, 26/12/2018; 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 25/Dec/2018

N0 WARNING.

GENERAL SITUATION AT 250900 UTC:
THE NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 251300 UTC:

HONG KONG= NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL NE 2 M. TEMP 19-24 C. =
KWANGTUNG= E TO NE 5-6, UP TO 7 IN E. DOWN TO 4000 M IN MIST OR LGT RAIN PATCHES. SEA 2-4 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 6-7. DOWN TO 4000 M IN MIST OR LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 3-4 M. =
BASHI= NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 3-4 M. =
PRATAS= NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 3 M. =
BALINTANG= NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 3-4 M. =
SCARBOROUGH= NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 3 M. =
PARACEL= E TO NE 5-6, OCNL 7. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA UP TO 4 M. SWELL NE 2-3 M. =
TONKIN= E TO SE 4-5. DOWN TO 4000 M IN MIST PATCHES. SEA 2-3 M. SWELL NE 2 M. =
DANANG= E 4-5, OCNL 6. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA UP TO 3 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
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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 25/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 25 December 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 4 to 5, occasionally force 6.
    Visibility relatively low in some areas at first.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    Northeast force 6 to 7.
    Rough seas.

    South of Hong Kong:
    Northeast force 5 to 6.
    Moderate to rough seas.

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

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

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

    Waglan Island Wind northeast force 2
      Visibility 8 Kilometres

    Shantou Wind northeast force 1
      Visibility 6 Kilometres in drizzle

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 3

    Xisha Wind east-northeast force 2
      Visibility 15 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 25/DEC/2018
    (Next update at 01:30 HKT 26/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
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 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/5-10
       OFFSHORE:  060/15 OCNL 20                       20-18
   B.   2000 FT:  040/10                               14
   C.   5000 FT:  200/5-10                             15
   D.  10000 FT:  240/20                               10
   E.  18000 FT:  260/25                               0
   F.  24000 FT:  270/25                               MS13
   G.  30000 FT:  270/30                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2300-3700 FT
   I. WEATHER       : 
      CLOUDY. LOCALISED MIST
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 2500 FT  BKN 6000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN MIST.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 7000, 8400, 10000 FT
   M. TURBULENCE    : MOD OFFSHORE
   N. SEA STATE     : 1.0-2.0 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTHEASTERLY WINDS. MAINLY
     CLOUDY AT FIRST, MAINLY FINE DURING THE DAY.=

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

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

Hong Kong Observatory
Maximum Air Temperature                     21.1 C
Minimum Air Temperature                     18.5 C
Grass Minimum Temperature                   17.7 C
Relative Humidity                        76 - 86 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2162.9 mm
Against an average of                     2389.4 mm

Other Stations                Min                  Max
King's Park                  17.8 C               21.4 C
Wong Chuk Hang               18.1 C               21.9 C
Ta Kwu Ling                  16.0 C               21.3 C
Lau Fau Shan                 15.6 C               20.7 C
Tai Po                       16.9 C               19.9 C
Sha Tin                      17.6 C               20.5 C
Tuen Mun                     16.6 C               20.8 C
Tseung Kwan O                17.6 C               21.1 C
Sai Kung                     18.1 C               20.8 C
Cheung Chau                  17.7 C               21.8 C
Chek Lap Kok                 17.9 C               21.3 C
Tsing Yi                     18.4 C               21.3 C
Shek Kong                    16.0 C               21.1 C
Tsuen Wan Ho Koon            16.5 C               20.3 C
Tsuen Wan Shing Mun Valley   17.6 C               21.1 C
Hong Kong Park               18.3 C               21.2 C
Shau Kei Wan                 18.0 C               20.8 C
Kowloon City                 17.7 C               21.6 C
Happy Valley                 18.5 C               21.7 C
Wong Tai Sin                 18.4 C               21.6 C
Stanley                      18.1 C               21.2 C
Sham Shui Po                 17.7 C               21.5 C
Kai Tak Runway Park          18.5 C               21.5 C
Yuen Long Park               15.9 C               21.2 C
Tai Mei Tuk               17.1 C               21.5 C

Duration of sunshine (King's Park):              0.1 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 4.
 

Yesterday's (25 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                          0.09
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 25 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <26 Dec 2018> 

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