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Bulletin issued at 10:02 HKT 31/Aug/2016

At 10 a.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 74 per cent.
During the past hour the mean UV Index recorded at King's Park was 4. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang // degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 29 degrees;
Tai Po 29 degrees;
Sha Tin 29 degrees;
Tuen Mun 30 degrees;
Tseung Kwan O 30 degrees;
Sai Kung 31 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 29 degrees;
Shek Kong 30 degrees;
Tsuen Wan Ho Koon 28 degrees;
Tsuen Wan Shing Mun Valley 30 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 30 degrees;
Kowloon City 30 degrees;
Happy Valley 31 degrees;
Wong Tai Sin 31 degrees;
Stanley 29 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 30 degrees;
Kai Tak Runway Park 31 degrees;
Yuen Long Park 30 degrees.


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


Climatological Information for 31 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Local Weather Forecast

Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 09:45 HKT 31/Aug/2016

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

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

Weather forecast for today

Sunny intervals and one or two showers. Light to moderate southwesterly winds.

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


(The above forecast period is valid up to 23:59 HKT today, 31/08/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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Marine Weather Information and Forecast

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 31/Aug/2016

N0 WARNING.

GENERAL SITUATION AT 302100 UTC:
TROUGH 21N 115E 21N 122E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 310100 UTC:

HONG KONG= SW 3-4. ISOL SHOWERS. TEMP 31-25 C. =
KWANGTUNG= SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= W TO SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BASHI= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PRATAS= W TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
SCARBOROUGH= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PARACEL= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M. =
TONKIN= SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
DANANG= SW 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA 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 09:30 HKT 31/Aug/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 31 August 2016

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southwest force 3 to 4.
    Isolated showers.
    Slight to moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    Southwest force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    Southwesterly winds of force 5 to 6. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind variable force 1
      Visibility 12 Kilometres

    Shantou Wind west force 1
      Visibility 8 Kilometres

    Dongsha Wind west force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind west force 1

    Macau Wind south-southwest force 1
      Visibility 8 Kilometres in showers

    Xisha Wind southwest force 3
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 31/AUG/2016
    (Next update at 17:30 HKT 31/AUG/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.

II.  SYNOPSIS OF THE WEATHER SITUATION :
     SHOWERS ARE AFFECTING THE NORTHERN PART OF THE
     SOUTH CHINA SEA AND THE COAST OF GUANGDONG.

III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  220/5-10                             28-32
   B.   2000 FT:  220/10                               24
   C.   5000 FT:  250/10                               19
   D.  10000 FT:  290/15                               12
   E.  18000 FT:  310/15                               MS2
   F.  24000 FT:  320/10                               MS11
   G.  30000 FT:  340/10                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY INTERVALS AND A FEW SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : NIL.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG

IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE.  CLOUDY WITH SHOWERS AND A FEW
     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 07:25 HKT on 31 Aug 16

    VHHK SIGMET 6 VALID 302325/310325 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1818 E11318 - N1942 E11400 - N2006 E11642 - N1736 E11442 - N1818 E11318 TOP FL420 MOV E 05KT 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
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 21:30 HKT 19/Aug/2016


    Tropical Cyclone Warning

    At 191200 UTC, Tropical Storm Dianmu (1608) with central pressure 988 hectopascals was centred within 60 nautical miles of two zero point eight degrees north (20.8 N) one zero five point four degrees east (105.4 E) and is forecast to weaken and move west at about 14 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 60 nautical miles over eastern semicircle, 30 nautical miles elsewhere.
    Radius of over 2 metre waves 150 nautical miles.

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

    Forecast position and intensity at 201200 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 31/Aug/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.2 C
Minimum Air Temperature                     26.1 C
Grass Minimum Temperature                   25.5 C
Relative Humidity                        57 - 80 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1941.2 mm
Against an average of                     1894.2 mm

Other Stations                Min                  Max
King's Park                  25.3 C               31.4 C
Ta Kwu Ling                  23.4 C               31.7 C
Lau Fau Shan                 24.0 C               30.8 C
Tai Po                       24.0 C               29.9 C
Sha Tin                      24.2 C               31.4 C
Tuen Mun                     24.7 C               32.3 C
Tseung Kwan O                23.5 C               32.3 C
Sai Kung                     24.9 C               31.2 C
Cheung Chau                  24.7 C               30.2 C
Chek Lap Kok                 26.3 C               31.6 C
Tsing Yi                     24.5 C               31.5 C
Shek Kong                    23.7 C               31.7 C
Tsuen Wan Ho Koon            23.5 C               29.1 C
Tsuen Wan Shing Mun Valley   24.0 C               31.9 C
Hong Kong Park               25.0 C               31.5 C
Shau Kei Wan                 25.5 C               30.4 C
Kowloon City                 25.3 C               31.8 C
Happy Valley                 25.5 C               32.1 C
Wong Tai Sin                 25.0 C               33.0 C
Stanley                      26.0 C               30.3 C
Kwun Tong                    25.5 C               32.0 C
Sham Shui Po                 25.6 C               32.1 C
Kai Tak Runway Park          26.4 C               30.8 C
Yuen Long Park               24.0 C               32.6 C

Duration of sunshine (King's Park):              5.0 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 9.
Sea surface temperature (Waglan Island):        28.4 C 

Yesterday's (30 Aug 2016) 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                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.10
Kwun Tong                           0.12
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 during
the period 1987-2015, 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 30 Aug
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