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Bulletin issued at 17:02 HKT 21/Aug/2018

At 5 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 85 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.6. The intensity of UV radiation was low.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 6:00 p.m. today. Isolated thunderstorms are expected to occur over Lantau, New Territories West and New Territories North.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 26 degrees;
Tai Po 29 degrees;
Sha Tin 30 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 29 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 29 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 28 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 29 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 30 degrees;
Stanley 29 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 29 degrees.

Between 3:45 and 4:45 p.m., lightning was detected within Lantau and New Territories West. The rainfall recorded in various regions were:

Yuen Long 0 to 11 mm;
Tuen Mun 0 to 10 mm.


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


Climatological Information for 21 Aug

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 21/Aug/2018

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

Winds are light over the coast of Guangdong. A broad trough of low pressure is bringing showers to the northern part of the South China Sea. Locally, the heavy showers in the afternoon brought more than 10 millimetres of rainfall to the urban areas, New Territories West and Lantau Island, and rainfall even exceeded 30 millimetres over Wan Chai District.

At 4 p.m., Severe Typhoon Soulik was centred about 320 kilometres south of Kagoshima. It is forecast to move west-northwest at about 22 kilometres per hour across the seas south of Kyushu of Japan.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers and isolated thunderstorms. Sunny periods and relatively low visibility tomorrow. Temperatures will range between 27 and 32 degrees. Light winds.

Outlook : A few showers and sunny intervals in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 22/08/2018; 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 21/Aug/2018

N0 WARNING.

GENERAL SITUATION AT 202100 UTC:
A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= SW 4. DOWN TO 2000 M IN ISOL HEAVY SQUALLY SHOWERS AND TS. DOWN TO 4000 M IN SOME HAZE. SEA UP TO 2 M. SWELL SW UP TO 2 M. TEMP 31-27 C. =
KWANGTUNG= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
TAIWAN STRAIT= SW 4-5, UP TO 6 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M, UP TO 3 M LATER. SWELL SW 2 M. =
BASHI= SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2 M. =
PRATAS= SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
BALINTANG= SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2 M. =
SCARBOROUGH= SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2-3 M. =
PARACEL= SW 5-6, UP TO 7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. SWELL S TO SW 2-3 M. =
TONKIN= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S TO SW 2 M. =
DANANG= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S TO SW 2 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

    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 21/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 21 August 2018

    Weather Situation:
    A broad trough of low pressure is bringing unsettled weather to the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southwest force 3, occasionally force 4.
    Isolated squally showers and thunderstorms, visibility relatively low in some areas.
    Slight to moderate seas.

    Nan'ao:
    Southwest force 4 to 5.
    Scattered squally showers and thunderstorms.
    Moderate seas.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    Southwest force 4.
    Scattered squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Southwesterly winds of force 4, occasionally force 5. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind southeast force 2
      Visibility 23 Kilometres

    Shantou Wind southeast force 3
      Visibility 30 Kilometres

    Dongsha Wind west force 2
      Visibility 9 Kilometres in rain

    Huangmaozhou Wind south-southeast force 2

    Macau Wind southwest force 1
      Visibility 3800 Metres in mist

    Xisha Wind southwest 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 12:30 HKT 21/AUG/2018
    (Next update at 17:30 HKT 21/AUG/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A BROAD TROUGH OF LOW PRESSURE IS BRINGING
     UNSETTLED WEATHER TO 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:  VRB/5
                  TEMPO VRB/15G25 IN TS                32-28
   B.   2000 FT:  030/5                                24
   C.   5000 FT:  040/10                               19
   D.  10000 FT:  040/15                               11
   E.  18000 FT:  050/20                               0
   F.  24000 FT:  030/20                               MS10
   G.  30000 FT:  030/15                               MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDLY WITH A FEW SHOWERS AND ISOLATED
      THUNDERSTORMS. LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3500 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN SHOWERS/MIST. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT WINDS. MAINLY CLOUDY WITH A FEW SHOWERS
     AND ISOLATED THUNDERSTORMS.=

    ===================================================================
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.

    The latest significant weather information
    issued by the Hong Kong Observatory at 16:40 HKT on 21 Aug 18

    VHHK SIGMET 2 VALID 210445/210845 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2130 E11730 - N2148 E11400 - N2100 E11200 - N1930 E11300 - N1754 E11500 - N2100 E11730 - N2130 E11730 TOP FL450 STNR NC= VHHK SIGMET 3 VALID 210845/211245 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1642 E11400 - N1806 E11242 - N1854 E11206 - N2036 E11354 - N2206 E11730 - N2100 E11730 TOP FL480 STNR NC=

    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 21/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.5 C
Minimum Air Temperature                     26.1 C
Grass Minimum Temperature                   25.1 C
Relative Humidity                        80 - 97 Percent
Rainfall                                    61.1 mm 
Total rainfall since 1st January          1297.0 mm
Against an average of                     1761.7 mm

Other Stations                Min                  Max
King's Park                  25.9 C               30.3 C
Wong Chuk Hang               24.5 C               28.8 C
Ta Kwu Ling                  25.1 C               32.1 C
Lau Fau Shan                 23.9 C               30.5 C
Tai Po                       26.1 C               30.7 C
Sha Tin                      25.8 C               31.8 C
Tuen Mun                     25.0 C               30.4 C
Tseung Kwan O                25.4 C               29.6 C
Sai Kung                     25.6 C               29.8 C
Cheung Chau                  24.5 C               29.2 C
Chek Lap Kok                 25.8 C               31.6 C
Tsing Yi                     25.4 C               30.9 C
Shek Kong                    25.0 C               31.8 C
Tsuen Wan Ho Koon            24.5 C               28.7 C
Tsuen Wan Shing Mun Valley   25.3 C               31.0 C
Hong Kong Park               24.8 C               29.5 C
Shau Kei Wan                 25.0 C               29.2 C
Kowloon City                 25.3 C               31.0 C
Happy Valley                 25.3 C               31.5 C
Wong Tai Sin                 25.4 C               31.1 C
Stanley                      24.7 C               28.7 C
Kwun Tong                    25.5 C               31.1 C
Sham Shui Po                 25.5 C               31.5 C
Kai Tak Runway Park          25.9 C               29.8 C
Yuen Long Park               24.4 C               32.0 C
Tai Mei Tuk               25.9 C               30.8 C

Duration of sunshine (King's Park):              0.9 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
 

Yesterday's (20 Aug 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                        0.14

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 20 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <21 Aug 2018> 

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