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Bulletin issued at 22:02 HKT 21/Aug/2019

At 10 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 78 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 21 Aug

Regional Weather in Hong Kong

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Bulletin updated at 21:45 HKT 21/Aug/2019

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

The weather is mainly fine over southeastern China. Meanwhile, the trough of low pressure over the northern part of the South China Sea is bringing showers to the region.

At 8 p.m., Tropical Depression Bailu was centred about 1360 kilometres southeast of Gaoxiong. It is forecast to move west-northwest at about 14 kilometres per hour across the western North Pacific towards the vicinity of Taiwan.

Weather forecast for tonight and tomorrow

Mainly cloudy with one or two showers. The minimum temperature will be about 28 degrees. Hot with sunny periods tomorrow. The maximum temperature will be around 32 degrees in the urban areas, and a couple of degrees higher in the New Territories. Light to moderate southeasterly winds.

Outlook : Very hot with isolated showers after midday in the following couple of days. More showers on Sunday.


(The above forecast period is valid up to 23:59 HKT tomorrow, 22/08/2019; 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 21:00 HKT 21/Aug/2019

N0 WARNING.

GENERAL SITUATION AT 210900 UTC:
TROUGH 21N 110E 20N 112E 20N 116E 21N 118E 22N 120E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 211300 UTC:

HONG KONG= SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S UP TO 2 M. TEMP 28-32 C. =
KWANGTUNG= SE 4-5, BEC NW 4-5 IN E. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
TAIWAN STRAIT= SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
BASHI= SW 4-5, BEC NW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
PRATAS= S 4-5, BEC NW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
BALINTANG= SW 5-6, BEC NW 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= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
TONKIN= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S UP TO 2 M. =
DANANG= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S 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
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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 19:30 HKT 21/Aug/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 21 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 squally showers and thunderstorms.
    Moderate seas.

    Nan'ao:
    Southeast force 4 to 5, becoming northwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

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

    Outlook for the next 48 hours
    South to southwesterly winds of force 4 to 5, northwesterly winds up to force 6 in east. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind east-southeast force 3
      Visibility 32 Kilometres

    Shantou Wind southeast force 2
      Visibility 24 Kilometres

    Dongsha Wind west-northwest force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind southeast force 4

    Macau Wind east-southeast force 2
      Visibility 27 Kilometres

    Xisha Wind southwest force 2
      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 21/AUG/2019
    (Next update at 01:30 HKT 22/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:  120/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  120/10                               32-28
   B.   2000 FT:  120/10                               23
   C.   5000 FT:  080/20                               21
   D.  10000 FT:  080/10                               11
   E.  18000 FT:  340/10                               0
   F.  24000 FT:  240/10                               MS12
   G.  30000 FT:  240/20                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY. ISOLATED SHOWERS AND
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT TEMPO FEW CB 1000 FT SCT 2000 FT
      BKN 4000 FT
   K. VISIBILITY    : 9 KM. TEMPO 3500 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHEASTERLY WINDS. MAINLY
     CLOUDY WITH A FEW SHOWERS AND THUNDERSTORMS.
     SUNNY PERIODS DURING THE DAY.=

    ===================================================================
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 19:31 HKT on 21 Aug 19

    VHHK SIGMET 3 VALID 211130/211530 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1753 E11458 - N1744 E11350 - N2016 E11216 - N2135 E11449 - N2114 E11730 - N2100 E11730 TOP FL430 MOV E 10KT WKN=

    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/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.7 C
Minimum Air Temperature                     28.0 C
Grass Minimum Temperature                   27.1 C
Relative Humidity                        68 - 88 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          1705.9 mm
Against an average of                     1761.7 mm

Other Stations                Min                  Max
King's Park                  27.1 C               30.9 C
Wong Chuk Hang               25.8 C               31.1 C
Ta Kwu Ling                  26.6 C               32.9 C
Lau Fau Shan                 26.0 C               32.9 C
Tai Po                       27.0 C               30.6 C
Sha Tin                      27.1 C               31.6 C
Tuen Mun                     26.8 C               30.5 C
Tseung Kwan O                25.8 C               30.9 C
Sai Kung                     27.2 C               31.6 C
Cheung Chau                  25.9 C               31.6 C
Chek Lap Kok                 28.4 C               33.3 C
Tsing Yi                     26.5 C               32.9 C
Shek Kong                    25.9 C               33.3 C
Tsuen Wan Ho Koon            24.9 C               31.0 C
Tsuen Wan Shing Mun Valley   25.5 C               31.3 C
Hong Kong Park               26.7 C               31.3 C
Shau Kei Wan                 26.4 C               30.1 C
Kowloon City                 26.9 C               32.0 C
Happy Valley                 26.8 C               32.0 C
Wong Tai Sin                 27.2 C               31.2 C
Stanley                      26.6 C               31.2 C
Kwun Tong                    27.3 C               31.1 C
Sham Shui Po                 27.4 C               32.4 C
Kai Tak Runway Park          26.6 C               30.4 C
Yuen Long Park               26.3 C               33.0 C
Tai Mei Tuk               26.6 C               32.1 C

Duration of sunshine (King's Park):              7.5 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 10.
 

Yesterday's (20 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                        0.14

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 2019> 

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