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Bulletin issued at 18:02 HKT 18/Aug/2018

At 6 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 77 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.

The air temperatures at other places were:

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

Between 4:45 and 5:45 p.m., the rainfall recorded in various regions were:

Tai Po 0 to 1 mm;
Yuen Long 0 to 1 mm.


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


Climatological Information for 18 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 17:45 HKT 18/Aug/2018

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

A southwesterly airstream is bringing showers to the coast of Guangdong and the northern part of the South China Sea.

At 4 p.m., Tropical Depression Rumbia was centred about 240 kilometres north of Wuhan. It is forecast to move west-northwest at about 10 kilometres per hour across Henan and weaken gradually. Meanwhile, Typhoon Soulik was centred about 130 kilometres west of Iwo Jima. It is forecast to move north slowly across the western North Pacific.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers and isolated thunderstorms. Sunny intervals in the afternoon tomorrow. Temperatures will range between 27 and 31 degrees. Moderate south to southwesterly 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, 19/08/2018; 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 18/Aug/2018

N0 WARNING.

GENERAL SITUATION AT 172100 UTC:
A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 180100 UTC:

HONG KONG= S TO SW 4. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. TEMP 30-27 C. =
KWANGTUNG= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TAIWAN STRAIT= SW 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 2 M. =
BASHI= S TO SW 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 2 M. =
PRATAS= S TO SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
BALINTANG= S TO SW 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 2 M. =
SCARBOROUGH= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PARACEL= SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TONKIN= S TO SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
DANANG= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL 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
  • 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 16:30 HKT 18/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 18 August 2018

    Weather Situation:
    A southwesterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

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

    South of Hong Kong and Shangchuan Dao:
    South to southwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

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

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

    Waglan Island Wind southwest force 3
      Visibility 21 Kilometres

    Shantou Wind east-southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind west-southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind west-southwest force 2

    Macau Wind west-northwest force 1
      Visibility 11 Kilometres in showers

    Xisha Wind southwest force 4
      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 18/AUG/2018
    (Next update at 01:30 HKT 19/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 SOUTHWESTERLY AIRSTREAM 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:  230/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  210/10-15                            30-27
   B.   2000 FT:  210/10-15                            25
   C.   5000 FT:  210/10                               19
   D.  10000 FT:  210/10                               12
   E.  18000 FT:  090/10                               MS2
   F.  24000 FT:  080/10                               MS12
   G.  30000 FT:  080/15                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS AND ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS.  TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS.  MAINLY
     CLOUDY WITH A FEW SHOWERS AND ISOLATED
     THUNDERSTORMS. SUNNY INTERVALS IN THE AFTERNOON.=

    ===================================================================
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 15:30 HKT on 18 Aug 18

    VHHK SIGMET 1 VALID 180330/180730 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2124 E11730 - N2112 E11442 - N2248 E11436 - N2400 E11730 - N2124 E11730 TOP FL400 STNR NC= VHHK SIGMET 2 VALID 180730/181130 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N2048 E11718 - N2048 E11424 - N2236 E11406 - N2336 E11624 - N2354 E11730 - N2100 E11730 TOP FL400 MOV NE 10KT 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 18/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.3 C
Minimum Air Temperature                     25.5 C
Grass Minimum Temperature                   26.5 C
Relative Humidity                        84 - 98 Percent
Rainfall                                    36.1 mm 
Total rainfall since 1st January          1182.9 mm
Against an average of                     1719.2 mm

Other Stations                Min                  Max
King's Park                  25.3 C               28.3 C
Wong Chuk Hang               25.5 C               27.6 C
Ta Kwu Ling                  24.5 C               29.9 C
Lau Fau Shan                 24.6 C               28.5 C
Tai Po                       25.1 C               28.9 C
Sha Tin                      25.2 C               29.5 C
Tuen Mun                     25.2 C               27.2 C
Tseung Kwan O                24.9 C               27.8 C
Sai Kung                     25.8 C               28.3 C
Cheung Chau                  24.6 C               26.5 C
Chek Lap Kok                 25.3 C               29.1 C
Tsing Yi                     25.5 C               28.3 C
Tsuen Wan Ho Koon            24.8 C               26.8 C
Tsuen Wan Shing Mun Valley   25.4 C               28.4 C
Hong Kong Park               25.0 C               27.5 C
Shau Kei Wan                 24.7 C               28.9 C
Kowloon City                 24.9 C               28.4 C
Happy Valley                 25.7 C               28.9 C
Wong Tai Sin                 25.1 C               28.8 C
Stanley                      24.9 C               27.6 C
Kwun Tong                    24.7 C               28.9 C
Sham Shui Po                 25.7 C               28.4 C
Kai Tak Runway Park          25.2 C               28.7 C
Yuen Long Park               24.8 C               29.7 C
Tai Mei Tuk               25.1 C               28.6 C

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

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

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