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Bulletin issued at 10:02 HKT 25/Aug/2018

At 10 a.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

Hot weather might cause adverse health effects. The Observatory advises the public to stay on the alert.

The air temperatures at other places were:

King's Park 31 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 32 degrees;
Lau Fau Shan 30 degrees;
Tai Po 31 degrees;
Sha Tin 32 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 32 degrees;
Sai Kung 33 degrees;
Cheung Chau 30 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 31 degrees;
Shek Kong 32 degrees;
Tsuen Wan Ho Koon 30 degrees;
Tsuen Wan Shing Mun Valley 32 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 32 degrees;
Kowloon City 32 degrees;
Happy Valley 33 degrees;
Wong Tai Sin 33 degrees;
Stanley 30 degrees;
Kwun Tong 33 degrees;
Sham Shui Po 32 degrees;
Kai Tak Runway Park 31 degrees;
Yuen Long Park 33 degrees;
Tai Mei Tuk 32 degrees.

Here is the information on Tropical Depression at 10 a.m.:
Location: 25.4 degrees north, 119.4 degrees east.


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


Climatological Information for 25 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 09:45 HKT 25/Aug/2018

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

Winds are light over the coast of Guangdong.

At 10 a.m., the tropical depression over Fujian was centred about 170 kilometres northeast of Xiamen. It is forecast to move west at about 12 kilometres per hour across inland Fujian and weaken gradually.

Weather forecast for today

Hot with sunny periods and some haze. A few showers and isolated thunderstorms later. Light winds.

Outlook : Sunny intervals and a few showers tomorrow. Showers increasing gradually in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 25/08/2018; 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 09:00 HKT 25/Aug/2018

GALE WARNING AREAS: BASHI, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 242100 UTC:
FOR DETAILS ON THE TROPICAL DEPRESSION NEAR TAIWAN, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= W 3-4. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 4000 M IN SOME HAZE. TEMP 32-27 C. =
KWANGTUNG= W TO SW 4-5, 6 IN E. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2 M, 3 M IN E. SWELL SW 2 M. =
TAIWAN STRAIT= S TO SW 6-7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2 M. =
BASHI= SW 6-7, OCNL 8. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 2-3 M. =
PRATAS= SW 5-6, OCNL 7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
BALINTANG= SW 6-7, OCNL 8. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 2-3 M. =
SCARBOROUGH= SW 6-7, OCNL 8. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 2 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 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 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.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 09:30 HKT 25/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 25 August 2018

    Warnings:
    Strong winds in Nan'ao and Shanwei.

    Weather Situation:
    Showers and thunderstorms are affecting the south China coastal waters.

    Besides, the tropical depression made landfall over Fujian. At 9 a.m., the tropical depression over Fujian with maximum sustained winds of about 45 kilometres per hour near its centre was located at 25.4 degrees north, 119.5 degrees east. It is forecast to move west at about 12 kilometres per hour across inland Fujian and weaken gradually.

    Area forecasts for the next 24 hours

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

    Nan'ao:
    West force 5 to 6.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Shanwei:
    West force 4 to 5, occasionally force 6.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

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

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

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

    Waglan Island Wind west force 3
      Visibility 7 Kilometres

    Shantou Wind west force 1
      Visibility 24 Kilometres

    Dongsha Wind west force 3
      Visibility 8 Kilometres in rain

    Huangmaozhou Wind west-northwest force 3

    Macau Wind west force 2
      Visibility 8 Kilometres

    Xisha Wind southwest force 4
      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 09:30 HKT 25/AUG/2018
    (Next update at 12:30 HKT 25/AUG/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     SHOWERS AND THUNDERSTORMS ARE AFFECTING THE
     SOUTH CHINA COASTAL AREAS.
     AT 8 A.M., THE TROPICAL DEPRESSION NEAR FUJIAN
     WAS CENTRED NEAR 25.4 DEGREES NORTH, 119.6
     DEGREES EAST. IT IS FORECAST TO MOVE WEST AT
     ABOUT 6 KNOTS PER HOUR ACROSS INLAND FUJIAN AND
     WEAKEN GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  300/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  270/10-15, OCNL 20                   29-35
   B.   2000 FT:  000/15                               26
   C.   5000 FT:  300/15                               20
   D.  10000 FT:  330/10                               11
   E.  18000 FT:  030/10                               MS1
   F.  24000 FT:  070/15                               MS10
   G.  30000 FT:  070/15                               MS22
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY PERIODS WITH ISOLATED SHOWERS AND
      THUNDERSTORMS. LOCALIZED HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN SHOWERS/HAZE/MIST.  
      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE WESTERLIES. CLOUDY PERIODS
     WITH ISOLATED SHOWERS AND THUNDERSTORMS.
     LOCALIZED HAZE.=

    ===================================================================
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 07:35 HKT on 25 Aug 18

    VHHK SIGMET 8 VALID 242305/250305 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1942 E11624 - N1942 E11500 - N2054 E11218 - N2212 E11518 - N2224 E11730 - N2100 E11730 TOP FL500 STNR NC= VHHK SIGMET 9 VALID 242335/250335 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N1900 TOP FL450 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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
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    Severe Weather Information Centre

    Bulletin issued at 09:30 HKT 25/Aug/2018


    Tropical Cyclone Warning

    At 250000 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 six degrees east (119.6 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 90 nautical miles.

    Forecast position and intensity at 260000 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 25/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.9 C
Minimum Air Temperature                     25.6 C
Grass Minimum Temperature                   26.0 C
Relative Humidity                        70 - 90 Percent
Rainfall                                     0.1 mm 
Total rainfall since 1st January          1374.1 mm
Against an average of                     1836.6 mm

Other Stations                Min                  Max
King's Park                  25.2 C               32.4 C
Wong Chuk Hang               24.6 C               32.4 C
Ta Kwu Ling                  24.0 C               33.1 C
Lau Fau Shan                 24.2 C               32.6 C
Tai Po                       24.9 C               33.1 C
Sha Tin                      25.4 C               34.1 C
Tuen Mun                     25.0 C               32.4 C
Tseung Kwan O                24.4 C               32.5 C
Sai Kung                     25.1 C               32.9 C
Cheung Chau                  24.7 C               30.7 C
Chek Lap Kok                 27.0 C               33.8 C
Tsing Yi                     24.8 C               32.6 C
Shek Kong                    24.7 C               33.9 C
Tsuen Wan Ho Koon            23.9 C               31.7 C
Tsuen Wan Shing Mun Valley   24.6 C               33.0 C
Hong Kong Park               24.3 C               32.3 C
Shau Kei Wan                 24.8 C               33.0 C
Kowloon City                 25.4 C               33.8 C
Happy Valley                 25.1 C               34.4 C
Wong Tai Sin                 24.7 C               33.8 C
Stanley                      24.8 C               31.4 C
Kwun Tong                    25.5 C               33.0 C
Sham Shui Po                 25.3 C               33.6 C
Kai Tak Runway Park          25.6 C               32.4 C
Yuen Long Park               24.5 C               33.3 C
Tai Mei Tuk               24.5 C               33.5 C

Duration of sunshine (King's Park):              4.9 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 6.
 

Yesterday's (24 Aug 2018) 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                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.13
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 24 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Aug 2018> 

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