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Bulletin issued at 19:02 HKT 20/Aug/2019

At 7 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 74 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 20 Aug

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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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 18:45 HKT 20/Aug/2019

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

The trough of low pressure over the northern part of the South China Sea is bringing showers to the region and the coast of Guangdong.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers and isolated thunderstorms. Sunny intervals tomorrow. Temperatures will range between between 27 and 32 degrees. Light to moderate southeasterly winds.

Outlook : Sunny periods and a few showers in the following couple of days. The weather will be very hot later this week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 21/08/2019; 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 20/Aug/2019

N0 WARNING.

GENERAL SITUATION AT 192100 UTC:
TROUGH 20N 107E 21N 113E 23N 119E S SLOWLY.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= SE 4. ISOL SHOWERS AND TS. TEMP 32-27 C. =
KWANGTUNG= SE 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PRATAS= SW 4-5. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
BALINTANG= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
SCARBOROUGH= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
PARACEL= SW 4-5. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TONKIN= NE 4-5. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= W TO SW 4-5. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 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

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

    Bulletin issued at 19:30 HKT 20/Aug/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 20 August 2019

    Weather Situation:
    A 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:
    Southeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

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

    Shanwei and South of Hong Kong:
    East to southeast force 4 to 5.
    Scattered showers and squally thunderstorms.
    Moderate seas.

    Shangchuan Dao:
    South to southeast force 4 to 5.
    Scattered showers and squally thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 4 to 5, becoming northerly winds of force 4 to 5 in east later. Scattered showers and squally thunderstorms.

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

    Waglan Island Wind east force 3
      Visibility 22 Kilometres

    Shantou Wind east-southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind west force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind east-southeast force 2
      Visibility 23 Kilometres

    Xisha Wind south-southwest force 3
      Visibility 9 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 20/AUG/2019
    (Next update at 01:30 HKT 21/AUG/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING UNSETTLED
     WEATHER TO 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:  110/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  110/15-20                            31-27
   B.   2000 FT:  080/10-15                            23
   C.   5000 FT:  080/20                               19
   D.  10000 FT:  080/10                               11
   E.  18000 FT:  040/10                               MS1
   F.  24000 FT:  040/15                               MS12
   G.  30000 FT:  020/20                               MS24
   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 2000 FT SCT 8000 FT
      TEMPO FEW 1000 FT SCT CB 1500 FT BKN 4000 FT
   K. VISIBILITY    : 9 KM. TEMPO 3500 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHEASTERLY WINDS. SUNNY
     INTERVALS. 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 17:46 HKT on 20 Aug 19

    VHHK SIGMET 3 VALID 200945/201345 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1756 E11501 - N1738 E11310 - N1930 E11130 - N2106 E11130 - N2217 E11730 - N2100 E11730 TOP FL460 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 20/Aug/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.8 C
Minimum Air Temperature                     26.8 C
Grass Minimum Temperature                   26.0 C
Relative Humidity                        73 - 91 Percent
Rainfall                                     0.1 mm 
Total rainfall since 1st January          1705.9 mm
Against an average of                     1744.3 mm

Other Stations                Min                  Max
King's Park                  26.4 C               31.7 C
Wong Chuk Hang               25.2 C               30.4 C
Ta Kwu Ling                  24.6 C               33.6 C
Lau Fau Shan                 25.0 C               32.5 C
Tai Po                       24.8 C               31.1 C
Sha Tin                      25.9 C               32.9 C
Tuen Mun                     25.6 C               32.3 C
Tseung Kwan O                25.3 C               31.1 C
Sai Kung                     26.0 C               31.6 C
Cheung Chau                  25.4 C               34.4 C
Chek Lap Kok                 26.7 C               33.0 C
Tsing Yi                     25.6 C               31.9 C
Shek Kong                    24.9 C               33.3 C
Tsuen Wan Ho Koon            24.4 C               30.2 C
Tsuen Wan Shing Mun Valley   25.1 C               31.6 C
Hong Kong Park               25.5 C               30.6 C
Shau Kei Wan                 26.4 C               31.8 C
Kowloon City                 26.2 C               32.1 C
Happy Valley                 25.8 C               32.3 C
Wong Tai Sin                 25.9 C               32.7 C
Stanley                      25.9 C               31.1 C
Kwun Tong                    26.6 C               31.6 C
Sham Shui Po                 26.0 C               32.9 C
Kai Tak Runway Park          26.6 C               31.4 C
Yuen Long Park               25.3 C               34.8 C
Tai Mei Tuk               25.5 C               32.9 C

Duration of sunshine (King's Park):              4.0 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 9.
 

Yesterday's (19 Aug 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.14 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                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.13

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 19 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Aug 2019> 

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