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Bulletin issued at 05:02 HKT 26/Aug/2018

At 5 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 80 per cent.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 27 degrees;
Tai Po 25 degrees;
Sha Tin 26 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 26 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 28 degrees;
Shek Kong 26 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 28 degrees;
Stanley 27 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 28 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 26 degrees.

Between 3:45 and 4:45 a.m., the rainfall recorded in various regions were:

Tai Po 0 to 9 mm;
Yuen Long 0 to 6 mm.


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


Climatological Information for 26 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 04:45 HKT 26/Aug/2018

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

Showers are affecting the coast of Guangdong and the northern part of South China Sea.

Weather forecast for today

Mainly cloudy with a few showers and thunderstorms. There will be some haze. Sunny intervals during the day. The maximum temperature will be around 32 degrees. Light to moderate westerly winds.

Outlook : Becoming more showery with thunderstorms in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 26/08/2018; 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 25/Aug/2018

GALE WARNING AREAS: BASHI, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 250900 UTC:
A WESTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 251300 UTC:

HONG KONG= W 3-4, OCNL 5. ISOL SHOWERS AND TS. DOWN TO 4000 M IN SOME HAZE. SEA UP TO 2 M. TEMP 27-32 C. =
KWANGTUNG= W 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TAIWAN STRAIT= 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. =
BASHI= S TO SW 6-7, OCNL 8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL S TO SW 2-3 M. =
PRATAS= SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
BALINTANG= S TO SW 6-7, OCNL 8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL S TO SW 2-3 M. =
SCARBOROUGH= S TO SW 6-7, OCNL 8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL S TO SW 2-3 M. =
PARACEL= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2 M. =
TONKIN= W TO SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
DANANG= W TO SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S TO 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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    Bulletin issued at 03:30 HKT 26/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 26 August 2018

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West force 3 to 4, occasionally force 5.
    Isolated showers and thunderstorms. Some haze.
    Slight to moderate seas.

    Nan'ao and Shanwei:
    West force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

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

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

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

    Waglan Island Wind calm
      Visibility 12 Kilometres

    Shantou Wind east force 1
      Visibility 25 Kilometres

    Huangmaozhou Wind west force 4

    Macau Wind west-southwest force 3
      Visibility 10 Kilometres

    Xisha Wind southwest force 4
      Visibility 13 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 26/AUG/2018
    (Next update at 9:00-9:30 HKT 26/AUG/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A WESTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  270/5-10
       OFFSHORE:  250/10-15                            28-33
   B.   2000 FT:  350/10-15                            26
   C.   5000 FT:  350/10-15                            20
   D.  10000 FT:  290/15                               11
   E.  18000 FT:  030/15                               MS2
   F.  24000 FT:  030/15                               MS12
   G.  30000 FT:  060/15                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY. SUNNY INTERVALS AND A FEW
      SHOWERS DURING THE DAY. LOCALISED HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT  SCT 4000 FT.
   K. VISIBILITY    : 8 KM.  TEMPO 4000 M IN SHOWERS/ HAZE.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE WESTERLIES. SUNNY INTERVALS
     WITH A FEW SHOWERS. ISOLATED THUNDERSTORM TO THE
     NORTH.=

    ===================================================================
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 02:56 HKT on 26 Aug 18

    VHHK SIGMET 7 VALID 251735/252135 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2224 E11718 - N2130 E11706 - N2118 E11436 - N2242 E11436 - N2330 E11624 - N2336 E11718 - N2224 E11718 TOP FL450 MOV S 10KT NC= VHHK SIGMET 10 VALID 251850/252250 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1642 E11400 - N1912 E11148 - N1912 E11600 - N1642 E11400 TOP FL490 STNR NC= VHHK SIGMET 11 VALID 251900/252300 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N2048 E11718 - N2124 E11442 - N2248 E11430 - N2400 E11730 - N2100 E11730 TOP FL450 MOV S 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

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    Bulletin issued at 12:30 HKT 25/Aug/2018


    Tropical Cyclone Warning

    At 250300 UTC, the tropical depression over Fujian with central pressure 996 hectopascals was centred within 60 nautical miles of two five point four degrees north (25.4 N) one one nine point three degrees east (119.3 E) and is forecast to move west at about 6 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 25 knots.

    Radius of over 2 metre waves 60 nautical miles.

    No further warnings on this Tropical Depression will be issued by the Hong Kong Observatory unless re-intensification takes place.

    Forecast position and intensity at 260300 UTC
    Dissipated over land.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

    Tropical Cyclone Track
    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 26/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.9 C
Minimum Air Temperature                     27.8 C
Grass Minimum Temperature                   26.9 C
Relative Humidity                        51 - 88 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1374.1 mm
Against an average of                     1847.6 mm

Other Stations                Min                  Max
King's Park                  28.1 C               33.4 C
Wong Chuk Hang               27.4 C               33.6 C
Ta Kwu Ling                  26.1 C               35.0 C
Lau Fau Shan                 27.6 C               33.5 C
Tai Po                       28.4 C               34.6 C
Sha Tin                      27.4 C               35.2 C
Tuen Mun                     28.1 C               33.8 C
Tseung Kwan O                26.4 C               34.4 C
Sai Kung                     28.7 C               34.3 C
Cheung Chau                  27.5 C               33.8 C
Chek Lap Kok                 27.5 C               34.3 C
Tsing Yi                     28.2 C               33.5 C
Shek Kong                    27.0 C               35.3 C
Tsuen Wan Ho Koon            27.0 C               32.8 C
Tsuen Wan Shing Mun Valley   26.4 C               34.3 C
Hong Kong Park               28.0 C               34.4 C
Shau Kei Wan                 28.6 C               34.8 C
Kowloon City                 28.0 C               35.1 C
Happy Valley                 28.3 C               36.2 C
Wong Tai Sin                 27.6 C               35.6 C
Stanley                      28.3 C               33.1 C
Kwun Tong                    28.7 C               35.3 C
Sham Shui Po                 28.6 C               34.8 C
Kai Tak Runway Park          28.1 C               33.7 C
Yuen Long Park               27.4 C               35.2 C
Tai Mei Tuk               28.4 C               34.6 C

Duration of sunshine (King's Park):              9.6 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 8.
 

Yesterday's (25 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                           0.13
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 25 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <26 Aug 2018> 

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