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Bulletin issued at 17:02 HKT 17/Dec/2018

At 5 p.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 60 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.5. The intensity of UV radiation was low.

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


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


Climatological Information for 17 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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

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Bulletin updated at 16:45 HKT 17/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.

Weather forecast for tonight and tomorrow

Mainly fine and dry. Cool in the morning with a minimum temperature of around 17 degrees in the urban areas, and a couple of degrees lower in the New Territories. The maximum temperature will be about 22 degrees during the day. Moderate northeasterly winds, becoming moderate to fresh easterlies later.

Outlook : Temperatures rising in the following few day and it will be warm during the day.


(The above forecast period is valid up to 23:59 HKT tomorrow, 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 17/Dec/2018

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

GENERAL SITUATION AT 162100 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 170100 UTC:

HONG KONG= N TO NE 5-6, OCNL 7. FINE. SEA UP TO 4 M. SWELL NE 2 M. TEMP 22-17 C. =
KWANGTUNG= N TO NE 6-7. FINE. SEA 3-4 M. SWELL NE 2 M. =
TAIWAN STRAIT= N TO NE 7-8. FINE. SEA 4-6 M. SWELL N TO NE 2-3 M. =
BASHI= N TO NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 3 M. =
PRATAS= N TO NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
BALINTANG= N TO NE 6-7, BEC 8. LGT RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 3 M. =
SCARBOROUGH= N TO NE 6-7, BEC 8. LGT RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 3 M. =
PARACEL= N TO NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 5-6, OCNL 7. FINE. SEA UP TO 4 M. SWELL NE UP TO 2 M. =
DANANG= N 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

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

    Bulletin issued at 16:30 HKT 17/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 17 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:
    North to northeast force 5 to 6.
    Moderate to rough seas.

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

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

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7.

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

    Waglan Island Wind northeast force 4
      Visibility 30 Kilometres

    Shantou Wind north-northeast force 2
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind north force 3
      Visibility 16 Kilometres

    Xisha Wind north-northeast force 4
      Visibility 17 Kilometres in showers

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
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  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 17/DEC/2018
    (Next update at 01:30 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 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/10
       OFFSHORE:  040/15 OCNL 20                       20-15
   B.   2000 FT:  070/10-15                            12
   C.   5000 FT:  090/20                               12
   D.  10000 FT:  280/10                               9
   E.  18000 FT:  270/35                               MS4
   F.  24000 FT:  290/40                               MS14
   G.  30000 FT:  270/50                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2300-2800 FT
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 4000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 5800 FT
   M. TURBULENCE    : MOD OFFSHORE
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHEASTERLY WINDS BECOMING MODERATE
     TO FRESH EASTERLY WINDS.  MAINLY FINE.=

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

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

Hong Kong Observatory
Maximum Air Temperature                     20.9 C
Minimum Air Temperature                     18.0 C
Grass Minimum Temperature                   16.3 C
Relative Humidity                        61 - 82 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2383.7 mm

Other Stations                Min                  Max
King's Park                  17.4 C               21.3 C
Wong Chuk Hang               17.9 C               23.0 C
Ta Kwu Ling                  15.3 C               19.9 C
Lau Fau Shan                 15.4 C               19.3 C
Tai Po                       15.3 C               19.3 C
Sha Tin                      15.9 C               20.0 C
Tuen Mun                     16.0 C               19.1 C
Tseung Kwan O                16.0 C               22.3 C
Sai Kung                     17.0 C               20.5 C
Cheung Chau                  16.1 C               22.4 C
Chek Lap Kok                 16.5 C               19.5 C
Tsing Yi                     17.2 C               21.0 C
Shek Kong                    15.3 C               20.1 C
Tsuen Wan Ho Koon            15.3 C               19.0 C
Tsuen Wan Shing Mun Valley   16.3 C               20.6 C
Hong Kong Park               18.2 C               21.7 C
Shau Kei Wan                 17.6 C               23.2 C
Kowloon City                 16.8 C               21.4 C
Happy Valley                 18.2 C               22.8 C
Wong Tai Sin                 16.9 C               21.1 C
Stanley                      18.0 C               22.6 C
Kwun Tong                    17.1 C               22.7 C
Kai Tak Runway Park          17.6 C               22.2 C
Yuen Long Park               15.8 C               19.4 C
Tai Mei Tuk               16.0 C               21.2 C

Duration of sunshine (King's Park):              1.2 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 (16 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 16 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <17 Dec 2018> 

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