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Bulletin issued at 00:02 HKT 05/Aug/2018

At midnight at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 79 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 27 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 28 degrees;
Tai Po 28 degrees;
Sha Tin 28 degrees;
Tuen Mun 29 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 26 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 29 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 29 degrees;
Stanley 28 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 28 degrees.


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


Climatological Information for 5 Aug

Regional Weather in Hong Kong

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Bulletin updated at 00:00 HKT 05/Aug/2018

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

A southerly airstream brought showers and thunderstorms to the coast of Guangdong yesterday. Locally, it was mainly cloudy with a few showers and isolated thunderstorms yesterday. More than 10 millimetres of rainfall were recorded over Hong Kong Island, Kowloon and the eastern part of the New Territories. It was very hot with sunny periods in the afternoon. Temperatures in many places rose to 33 degrees or above. An anticyclone aloft covering southern China will strengthen slightly early this week, bringing very hot weather to the region.

Besides, Tropical Depression Jongdari weakened into an area of low pressure over Jiangsu yesterday morning.

Weather forecast for Hong Kong (Sunday, 5 Aug 2018)

Mainly fine apart from one or two showers. Very hot during the day. Temperatures will range between 28 and 34 degrees. Light 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, 05/08/2018; 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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Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 04/Aug/2018

N0 WARNING.

GENERAL SITUATION AT 040900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 041300 UTC:

HONG KONG= S TO SE 4. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. TEMP 28-34 C. =
KWANGTUNG= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
PRATAS= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
BALINTANG= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
SCARBOROUGH= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
PARACEL= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TONKIN= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S TO SE 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
  • 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 04/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 04 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 to southeast force 4.
    Isolated squally showers and thunderstorms.
    Moderate seas.

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

    Outlook for the next 48 hours
    East to southeasterly winds of force 4 to 5, becoming force 6 later. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind south force 1

    Shantou Wind southeast force 1
      Visibility 30 Kilometres

    Dongsha Wind south-southeast force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southeast force 3

    Macau Wind south-southwest force 1
      Visibility 22 Kilometres

    Xisha Wind east-southeast force 1
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 04/AUG/2018
    (Next update at 01:30 HKT 05/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 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:  190/5-10
                  TEMPO VRB/15G25 IN TS                32-28
   B.   2000 FT:  200/10                               24
   C.   5000 FT:  180/10                               20
   D.  10000 FT:  170/10                               12
   E.  18000 FT:  200/10                               MS4
   F.  24000 FT:  290/10                               MS14
   G.  30000 FT:  040/10                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE WITH ISOLATED SHOWERS AND
      THUNDERSTORMS AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 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) : 11200 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 TO MODERATE SOUTHERLY WINDS. MAINLY FINE
     WITH ISOLATED SHOWERS.=

    ===================================================================
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 07:00 HKT on 04 Aug 18

    VHHK SIGMET 3 VALID 031900/032300 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2200 E11300 - N2100 E11300 - N2100 E11530 - N2254 E11600 - N2200 E11300 TOP FL450 MOV NE 10KT NC= VHHK SIGMET 4 VALID 032300/040100 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2200 E11300 - N2100 E11300 - N2200 E11600 - N2300 E11600 - N2200 E11300 TOP FL420 MOV N 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 05/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.5 C
Minimum Air Temperature                     27.3 C
Grass Minimum Temperature                   26.2 C
Relative Humidity                        68 - 94 Percent
Rainfall                                     5.0 mm 
Total rainfall since 1st January           988.7 mm
Against an average of                     1535.5 mm

Other Stations                Min                  Max
King's Park                  26.7 C               31.8 C
Wong Chuk Hang               26.5 C               31.3 C
Ta Kwu Ling                  25.6 C               33.9 C
Lau Fau Shan                 25.9 C               32.7 C
Tai Po                       26.0 C               34.0 C
Sha Tin                      26.2 C               33.5 C
Tuen Mun                     27.0 C               33.3 C
Tseung Kwan O                26.5 C               32.1 C
Sai Kung                     26.1 C               32.3 C
Cheung Chau                  26.6 C               31.4 C
Chek Lap Kok                 28.4 C               35.1 C
Tsing Yi                     25.9 C               31.9 C
Tsuen Wan Ho Koon            25.5 C               30.7 C
Tsuen Wan Shing Mun Valley   25.6 C               32.6 C
Hong Kong Park               26.0 C               32.5 C
Shau Kei Wan                 26.7 C               32.2 C
Kowloon City                 25.9 C               32.8 C
Happy Valley                 26.7 C               32.9 C
Wong Tai Sin                 26.1 C               33.1 C
Stanley                      28.0 C               31.1 C
Kwun Tong                    26.4 C               33.3 C
Sham Shui Po                 25.8 C               32.6 C
Kai Tak Runway Park          26.8 C               32.4 C
Yuen Long Park               26.3 C               34.4 C
Tai Mei Tuk               26.3 C               33.0 C

Duration of sunshine (King's Park):              5.3 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 (04 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 04 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <05 Aug 2018> 

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