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Bulletin issued at 21:02 HKT 28/Dec/2018

At 9 p.m. at the Hong Kong Observatory the air temperature was 17 degrees Celsius and the relative humidity 67 per cent.

Please be reminded that:

The Cold Weather Warning is now in force. Cold weather might cause adverse health effects. Members of the public should take care to keep warm.

The air temperatures at other places were:

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


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


Climatological Information for 28 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 20:45 HKT 28/Dec/2018

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

The winter monsoon affecting southern China is strengthening gradually.

At 8 p.m., the tropical depression to the east of the Philippines was centred about 820 kilometres east-southeast of Manila. It is forecast to move west-northwest at about 12 kilometres per hour towards the central part of the Philippines.

Weather forecast for tonight and tomorrow

Mainly cloudy. Becoming cold tomorrow with temperatures ranging between 12 and 16 degrees in the urban areas, and a couple of degrees lower in the New Territories. Bright periods during the day. Moderate to fresh north to northeasterly winds, occasionally strong offshore and on high ground tomorrow.

Outlook : Cold weather will persist and it will be windy in the following few days. A few rain patches early to midweek next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 29/12/2018; 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 28/Dec/2018

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

GENERAL SITUATION AT 280900 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. TROPICAL DEPRESSION 998 HPA 11N 128E WNW 6KT INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 281300 UTC:

HONG KONG= N TO NE 7-8. FINE. SEA 4-6 M. SWELL NE 2-3 M. TEMP 16-12 C. =
KWANGTUNG= N TO NE 7-8, OCNL 9. FINE. SEA UP TO 8 M. SWELL NE 3-5 M. =
TAIWAN STRAIT= N TO NE 8-9. FINE. SEA 6-8 M. SWELL N TO NE 3-5 M. =
BASHI= N TO NE 8-9. ISOL SHOWERS. SEA 6-8 M. SWELL N TO NE 3-5 M. =
PRATAS= N TO NE 7-8, OCNL 9. ISOL SHOWERS. SEA UP TO 8 M. SWELL NE 3-5 M. =
BALINTANG= N TO NE 8-9. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 6-8 M. SWELL N TO NE 3-5 M. =
SCARBOROUGH= N TO NE 8-9. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 6-8 M. SWELL NE 3-5 M. =
PARACEL= N TO NE 7-8, OCNL 9. ISOL SHOWERS. SEA UP TO 8 M. SWELL NE 3-5 M. =
TONKIN= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
DANANG= N TO NE 7-8. ISOL SHOWERS. SEA 4-6 M. SWELL NE 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 19:30 HKT 28/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 28 December 2018

    Warnings:
    Gale force winds in all areas.

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

    At 7 p.m., the tropical depression to the east of the Philippines with maximum sustained winds of about 55 kilometres per hour near its centre was located at 10.7 degrees north, 127.5 degrees east. It is forecast to move west-northwest at about 12 kilometres per hour towards the central part of the Philippines.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 7 to 8.
    Rough to very rough seas.

    Nan'ao:
    North to northeast force 8 to 9.
    Very rough to high seas.

    Shanwei and South of Hong Kong:
    North to northeast force 7 to 8, occasionally force 9.
    Very rough to high seas.

    Shangchuan Dao:
    North to northeast force 7 to 8.
    Rough to very rough seas.

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

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

    Waglan Island Wind north force 5
      Visibility 18 Kilometres

    Shantou Wind east force 3
      Visibility 30 Kilometres

    Dongsha Wind northeast force 5
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 5

    Macau Wind north-northeast force 4
      Visibility 11 Kilometres

    Xisha Wind northeast force 4
      Visibility 12 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 28/DEC/2018
    (Next update at 01:30 HKT 29/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN INTENSE 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:  020/15, OCNL 20 LATER
       OFFSHORE:  020/20-25, OCNL 30 LATER             18-11
   B.   2000 FT:  050/20-25, OCNL 30 LATER             12-8
   C.   5000 FT:  080/20                               10
   D.  10000 FT:  220/15                               7
   E.  18000 FT:  250/25                               MS5
   F.  24000 FT:  230/30                               MS15
   G.  30000 FT:  230/35                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4100 - 4500 FT.
   I. WEATHER       : 
      MAINLY CLOUDY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT  BKN 8000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16000 FT
      10 DEG. C LEVEL(S) : 2600, 5000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 3.0-4.5 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     FRESH NORTH TO NORTHEASTERLY WINDS, STRONG
     OFFSHORE AND ON HIGH GROUND.  BRIGHT PERIODS.=

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

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

Hong Kong Observatory
Maximum Air Temperature                     22.8 C
Minimum Air Temperature                     18.9 C
Grass Minimum Temperature                   17.2 C
Relative Humidity                        67 - 92 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2162.9 mm
Against an average of                     2391.5 mm

Other Stations                Min                  Max
King's Park                  17.6 C               23.5 C
Wong Chuk Hang               16.9 C               23.0 C
Ta Kwu Ling                  16.3 C               23.6 C
Lau Fau Shan                 17.0 C               23.0 C
Tai Po                       17.4 C               21.6 C
Sha Tin                      17.3 C               23.3 C
Tuen Mun                     18.4 C               23.9 C
Tseung Kwan O                16.9 C               23.9 C
Cheung Chau                  18.1 C               22.7 C
Chek Lap Kok                 19.5 C               22.7 C
Tsing Yi                     17.9 C               23.8 C
Shek Kong                    17.4 C               23.9 C
Tsuen Wan Ho Koon            17.2 C               22.1 C
Tsuen Wan Shing Mun Valley   17.4 C               24.7 C
Hong Kong Park               18.5 C               23.6 C
Kowloon City                 17.5 C               24.7 C
Happy Valley                 17.6 C               24.0 C
Wong Tai Sin                 17.8 C               24.3 C
Stanley                      18.2 C               22.9 C
Kwun Tong                    17.4 C               23.0 C
Sham Shui Po                 17.6 C               24.2 C
Kai Tak Runway Park          18.3 C               22.9 C
Yuen Long Park               17.7 C               24.2 C
Tai Mei Tuk               17.2 C               23.7 C

Duration of sunshine (King's Park):              3.5 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 (27 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 27 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <28 Dec 2018> 

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