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Bulletin issued at 01:02 HKT 04/Aug/2018

At 1 a.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 81 per cent.

Please be reminded that:

The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

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


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


Climatological Information for 4 Aug

Regional Weather in Hong Kong

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Bulletin updated at 00:45 HKT 04/Aug/2018

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

A southerly airstream brought showers to the coast of Guangdong yesterday. Locally, there were sunny periods, one or two showers and isolated thunderstorms. The southerly airstream is expected to affect the coast of Guangdong today. The anticyclone aloft covering southern China will strengthen slightly early next week, bringing very hot weather to the region.

Besides, Tropical Storm Jongdari made landfall over Jinshan, Shanghai yesterday and weakened gradually into a tropical depression. At 11 p.m. last night, Jongdari was centred about 90 kilometres northeast of Nanjing. It is forecast to move northwest at about 22 kilometres per hour further inland and dissipate gradually.

Weather forecast for Hong Kong

Mainly cloudy with a few showers. Very hot with sunny periods during the day. Temperatures will range between 28 and 33 degrees. Moderate southerly winds.

Outlook : Very hot with sunny periods and one or two showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 04/08/2018; 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 21:00 HKT 03/Aug/2018

N0 WARNING.

GENERAL SITUATION AT 030900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 031300 UTC:

HONG KONG= S 3-4, OCNL 5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. TEMP 28-33 C. =
KWANGTUNG= S 4, OCNL 5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL N TO NE UP TO 2 M. =
BASHI= SW 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 2 M. =
PRATAS= S 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
BALINTANG= SW 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
SCARBOROUGH= S 4, OCNL 5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
PARACEL= S 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TONKIN= S 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= S TO SW 4, OCNL 5. ISOL 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
  • 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 23:30 HKT 03/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 03 August 2018

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 3 to 4.
    Isolated squally showers and thunderstorms.
    Slight to moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South force 4, occasionally force 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    South to southeasterly winds of force 4 to 5. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind south-southwest force 2
      Visibility 32 Kilometres

    Shantou Wind calm
      Visibility 28 Kilometres

    Dongsha Wind southwest force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind southwest force 2

    Macau Wind west-northwest force 1
      Visibility 17 Kilometres

    Xisha Wind south force 2
      Visibility 24 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 01:30 HKT 04/AUG/2018
    (Next update at 9:00-9:30 HKT 04/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 SOUTHERLY AIRSTREAM IS BRINGING SHOWERS TO THE COAST OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  200/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  200/10-15                            28-34
   B.   2000 FT:  200/10-15                            25
   C.   5000 FT:  220/10                               20
   D.  10000 FT:  220/10                               13
   E.  18000 FT:  200/10                               MS2
   F.  24000 FT:  200/10                               MS12
   G.  30000 FT:  040/10                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS AND ISOLATED THUNDERSTORMS.
      SUNNY PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 3500 FT. 
      TEMPO FEW CB 1000 FT  SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS.  
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND 
                      NEAR HILLS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHERLY WINDS. SUNNY PERIODS. 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 12:27 HKT on 03 Aug 18

    VHHK SIGMET 1 VALID 030030/030430 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N2130 E OF E11500 TOP FL450 MOV NE 10KT NC= VHHK SIGMET 2 VALID 030430/030830 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2130 E11730 - N2130 E11554 - N2312 E11542 - N2400 E11730 - N2130 E11730 FL460 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 04/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.8 C
Minimum Air Temperature                     29.1 C
Grass Minimum Temperature                   27.4 C
Relative Humidity                        70 - 83 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           983.7 mm
Against an average of                     1521.5 mm

Other Stations                Min                  Max
King's Park                  28.2 C               32.1 C
Wong Chuk Hang               27.9 C               31.6 C
Ta Kwu Ling                  26.3 C               32.0 C
Lau Fau Shan                 26.8 C               31.9 C
Tai Po                       27.7 C               31.8 C
Sha Tin                      27.7 C               31.9 C
Tuen Mun                     28.2 C               32.7 C
Tseung Kwan O                27.2 C               33.4 C
Sai Kung                     28.1 C               34.8 C
Cheung Chau                  27.3 C               32.1 C
Chek Lap Kok                 28.4 C               34.1 C
Tsing Yi                     27.0 C               31.4 C
Tsuen Wan Ho Koon            26.2 C               29.4 C
Tsuen Wan Shing Mun Valley   26.4 C               31.8 C
Hong Kong Park               27.7 C               32.2 C
Shau Kei Wan                 27.8 C               32.8 C
Kowloon City                 27.8 C               32.9 C
Happy Valley                 28.7 C               33.1 C
Wong Tai Sin                 28.0 C               32.6 C
Stanley                      28.2 C               31.9 C
Kwun Tong                    28.2 C               32.5 C
Sham Shui Po                 28.5 C               32.8 C
Kai Tak Runway Park          28.5 C               32.6 C
Yuen Long Park               26.7 C               33.8 C
Tai Mei Tuk               27.5 C               33.3 C

Duration of sunshine (King's Park):              6.2 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 11.
 

Yesterday's (03 Aug 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.08
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 03 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <04 Aug 2018> 

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