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Bulletin issued at 12:02 HKT 18/Dec/2018

At noon at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 44 per cent.
During the past hour the mean UV Index recorded at King's Park was 5. The intensity of UV radiation was moderate.

Please be reminded that:

The Fire Danger Warning is Red and the fire risk is extreme.

The air temperatures at other places were:

King's Park 20 degrees;
Wong Chuk Hang 20 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 18 degrees;
Tai Po 19 degrees;
Sha Tin 19 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 19 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 19 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 20 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 21 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 20 degrees;
Stanley 20 degrees;
Kwun Tong 19 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 20 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 21 degrees.

No rainfall was recorded at the Hong Kong Observatory between midnight last night and midday today.


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


Climatological Information for 18 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Local Weather Forecast

Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 11:45 HKT 18/Dec/2018

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

A dry northeast monsoon is bringing generally fine weather to southern China. Locally, the relative humidity over most parts of the territory fell below 60 per cent around noon.

Weather forecast for this afternoon and tonight

Fine and dry. Becoming cloudier gradually tonight. Moderate east to northeasterly winds, occasionally fresh offshore.

Outlook : Cloudier tomorrow. Temperatures rising in the following couple of days and it will be warm during the day.


(The above forecast period is valid up to 23:59 HKT today, 18/12/2018; 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 18/Dec/2018

GALE WARNING AREAS: TAIWAN STRAIT, BASHI, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 172100 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 180100 UTC:

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

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 12:30 HKT 18/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 18 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.
    Moderate to rough seas.

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

    South of Hong Kong and Shangchuan Dao:
    East to northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Easterly winds of force 5 to 6, up to force 7 at first.

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

    Waglan Island Wind northeast force 4
      Visibility 19 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 29 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind north-northeast force 3
      Visibility 11 Kilometres

    Xisha Wind northeast force 3
      Visibility 17 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 12:30 HKT 18/DEC/2018
    (Next update at 17:30 HKT 18/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 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  050/5-10
                  BECMG 090/10
       OFFSHORE:  060/10-15
                  BECMG 090/15-20                      23-18
   B.   2000 FT:  110/15-20                            12
   C.   5000 FT:  110/15                               13
   D.  10000 FT:  270/15                               6
   E.  18000 FT:  270/30                               MS3
   F.  24000 FT:  310/40                               MS15
   G.  30000 FT:  280/40                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3500-4400 FT
   I. WEATHER       : 
      FINE. BECOMING CLOUDIER GRADUALLY TONIGHT.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 5000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 7400 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-2.5 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS. 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 18/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     21.0 C
Minimum Air Temperature                     15.6 C
Grass Minimum Temperature                   13.1 C
Relative Humidity                        45 - 64 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2384.1 mm

Other Stations                Min                  Max
King's Park                  14.9 C               21.7 C
Wong Chuk Hang               13.2 C               22.6 C
Ta Kwu Ling                   9.1 C               21.5 C
Lau Fau Shan                 13.2 C               21.6 C
Tai Po                       12.7 C               19.8 C
Sha Tin                      11.6 C               21.3 C
Tuen Mun                     14.0 C               22.4 C
Tseung Kwan O                12.2 C               22.1 C
Sai Kung                     15.0 C               20.2 C
Cheung Chau                  14.1 C               23.2 C
Chek Lap Kok                 14.8 C               21.9 C
Tsing Yi                     14.7 C               22.3 C
Shek Kong                    11.7 C               21.9 C
Tsuen Wan Ho Koon            13.1 C               22.7 C
Tsuen Wan Shing Mun Valley   12.6 C               22.6 C
Hong Kong Park               15.7 C               22.6 C
Shau Kei Wan                 15.4 C               21.7 C
Kowloon City                 14.4 C               21.9 C
Happy Valley                 13.7 C               22.3 C
Wong Tai Sin                 15.0 C               21.6 C
Stanley                      15.7 C               21.8 C
Kwun Tong                    15.1 C               21.4 C
Sham Shui Po                 14.8 C               23.5 C
Kai Tak Runway Park          15.9 C               22.5 C
Yuen Long Park               11.7 C               22.3 C
Tai Mei Tuk               13.6 C               23.0 C

Duration of sunshine (King's Park):              8.4 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 5.
 

Yesterday's (17 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 17 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <18 Dec 2018> 

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