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Bulletin issued at 03:02 HKT 14/Aug/2017

At 3 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 29 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 28 degrees;
Tai Po 28 degrees;
Sha Tin 29 degrees;
Tuen Mun 29 degrees;
Tseung Kwan O 28 degrees;
Sai Kung 28 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 28 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 28 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 29 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 29 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 28 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 14 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 02:45 HKT 14/Aug/2017

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

The subtropical ridge is bringing generally fine weather to southeastern China.

Weather forecast for today

Mainly fine. There will be isolated showers in the morning. Very hot during the day. Temperatures will range between 28 and 33 degrees. Moderate south to southwesterly winds.

Outlook : Mainly fine and very hot in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 14/08/2017; 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 13/Aug/2017

N0 WARNING.

GENERAL SITUATION AT 130900 UTC:
A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS. TROUGH 25N 106E 26N 112E 30N 118E SE 5KT.

MARINE FORECAST FOR 24 HOURS FROM 131300 UTC:

HONG KONG= S TO SW 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. TEMP 28-33 C. =
KWANGTUNG= S TO SW 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. =
TAIWAN STRAIT= SW 5-6. ISOL SHOWERS. SEA 2-3 M. =
BASHI= W TO SW 5-6, OCNL 7. ISOL SHOWERS. SEA UP TO 4 M. =
PRATAS= SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BALINTANG= W TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
SCARBOROUGH= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S TO SW 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL S UP TO 2 M. =
TONKIN= S 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S UP TO 2 M. =
DANANG= S 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 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 03:30 HKT 14/Aug/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 14 August 2017

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southwest force 4 to 5, occasionally force 6.
    Isolated showers.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    Southwest force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    South to southwest force 4 to 5, occasionally force 6.
    Moderate to rough seas.

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

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

    Waglan Island Wind southwest force 4
      Visibility 40 Kilometres

    Shantou Wind west-southwest force 2
      Visibility 30 Kilometres

    Dongsha Wind southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southwest force 4

    Macau Wind south force 2
      Visibility 22 Kilometres

    Xisha Wind south-southeast force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 14/AUG/2017
    (Next update at 9:00-9:30 HKT 14/AUG/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHWESTERLY 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:  200/5-10
       OFFSHORE:  220/15-20                            28-33
   B.   2000 FT:  200/15                               25
   C.   5000 FT:  240/10                               21
   D.  10000 FT:  230/15                               14
   E.  18000 FT:  200/10                               MS1
   F.  24000 FT:  200/10                               MS12
   G.  30000 FT:  080/20                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4000-4500 FT
   I. WEATHER       : 
      MAINLY FINE. ISOLATED SHOWERS LATER
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3000 FT.
   K. VISIBILITY    : 10 KM, TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : MOD OFFSHORE
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS.  MAINLY
     FINE.=

    ===================================================================
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 12:20 HKT on 04 Aug 17

    VHHK SIGMET 1 VALID 040020/040420 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1930 E11130 - N2124 E11130 - N2230 E11342 - N2300 E11512 - N2012 E11406 - N1930 E11130 TOP FL420 MOV N 10KT NC= VHHK SIGMET 2 VALID 040420/040820 VHHH- VHHK HONG KONG FIR EMBD TS FCSTWI N2006 E11130 - N2124 E11130 - N2230 E11342 - N2254 E11454 - N2130 E11454 - N2006 E11130 TOP FL420 MOV N 10KT NC= VHHK SIGMET 3 VALID 040420/040820 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2006 E11130 - N2124 E11130 - N2230 E11342 - N2254 E11454 - N2130 E11454 - N2006 E11130 TOP FL420 MOV N 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.

    The latest report on Tropical Cyclone Roke broadcast by Miss LEE SHUK MING , Senior Scientific Officer of the Hong Kong Observatory at 6:23 p.m. on 23 Jul 2017.
    Listen Listen

    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 14/Aug/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.4 C
Minimum Air Temperature                     28.6 C
Grass Minimum Temperature                   27.2 C
Relative Humidity                        69 - 83 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1905.1 mm
Against an average of                     1653.0 mm

Other Stations                Min                  Max
King's Park                  28.2 C               32.4 C
Wong Chuk Hang               27.7 C               31.5 C
Ta Kwu Ling                  25.5 C               33.9 C
Lau Fau Shan                 27.4 C               33.9 C
Tai Po                       27.9 C               32.8 C
Sha Tin                      28.7 C               32.9 C
Tuen Mun                     27.9 C               32.5 C
Tseung Kwan O                27.1 C               34.1 C
Sai Kung                     27.1 C               33.8 C
Cheung Chau                  26.7 C               31.9 C
Chek Lap Kok                 29.2 C               33.8 C
Tsing Yi                     28.0 C               32.4 C
Shek Kong                    28.0 C               33.6 C
Tsuen Wan Ho Koon            27.2 C               31.0 C
Tsuen Wan Shing Mun Valley   27.8 C               32.4 C
Hong Kong Park               28.0 C               33.3 C
Shau Kei Wan                 28.0 C               31.9 C
Kowloon City                 28.0 C               32.6 C
Happy Valley                 28.3 C               33.3 C
Wong Tai Sin                 27.7 C               32.9 C
Stanley                      28.0 C               31.6 C
Kwun Tong                    28.1 C               32.3 C
Sham Shui Po                 28.0 C               32.4 C
Kai Tak Runway Park          28.1 C               32.6 C
Yuen Long Park               27.1 C               33.7 C
Tai Mei Tuk               27.5 C               33.0 C

Duration of sunshine (King's Park):              8.6 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 12.
Sea surface temperature (Waglan Island):        24.9 C 

Yesterday's (13 Aug 2017) 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                           0.08
Tap Mun                             0.08
Kat O                               0.08
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.11
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 during
the period 1987-2016, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 13 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <14 Aug 2017> 

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