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Bulletin issued at 09:02 HKT 29/Aug/2017

At 9 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 83 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 28 degrees;
Tai Po 28 degrees;
Sha Tin 28 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 29 degrees;
Cheung Chau 29 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 29 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 30 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 29 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 28 degrees;
Stanley 28 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 29 degrees.

Between midnight and 9 a.m. the minimum temperature was 24.6 degrees Celsius at the Hong Kong Observatory.


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


Climatological Information for 29 Aug

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 08:45 HKT 29/Aug/2017

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

Under the influence of the subtropical ridge, the weather is generally fine over southeastern China. Meanwhile, a broad area of low pressure over the seas east of Luzon is bringing unsettled weather to the region.

Weather forecast for today

Mainly fine. Hot during the day with a maximum temperature of around 32 degrees. Light to moderate southeasterly winds.

Outlook : Very hot with sunny periods in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 29/08/2017; 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 09:00 HKT 29/Aug/2017

N0 WARNING.

GENERAL SITUATION AT 282100 UTC:
A SOUTHEASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 290100 UTC:

HONG KONG= SE 4. FINE. TEMP 32-28 C. =
KWANGTUNG= SE 4-5, E TO NE UP TO 5 IN E. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 5-6. FINE. SEA 2-3 M. =
BASHI= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
PRATAS= NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
SCARBOROUGH= N TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PARACEL= E TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= S TO SE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 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
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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 09:30 HKT 29/Aug/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 29 August 2017

    Weather Situation:
    A southeasterly airstream is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southeast force 4.
    Moderate seas.

    Nan'ao and Shanwei:
    East to northeast force 4 to 5.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    East to southeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 4 to 5, northeasterly winds of force 5 in east. Isolated showers and thunderstorms.

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

    Waglan Island Wind north force 2
      Visibility 30 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 30 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Macau Wind north-northwest force 1
      Visibility 29 Kilometres

    Xisha Wind southeast force 2
      Visibility 28 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 29/AUG/2017
    (Next update at 17:30 HKT 29/AUG/2017)
    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 COASTAL
     AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  110/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  120/10-15                            28-33
   B.   2000 FT:  100/10                               24
   C.   5000 FT:  110/10-15                            20
   D.  10000 FT:  160/15-20                            11
   E.  18000 FT:  120/15                               MS2
   F.  24000 FT:  110/15                               MS12
   G.  30000 FT:  110/20                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.  ISOLATED SHOWERS AND THUNDERSTORMS 
      OVER INLAND LATER.
   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 2500 M IN THUNDERSTORMS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHEASTERLY 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.

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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 07:20 HKT on 29 Aug 17

    VHHK SIGMET 7 VALID 282320/290320 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1812 E11236 - N1930 E11130 - N2106 E11130 - N2130 E11236 - N1900 E11354 - N1812 E11236 TOP FL420 MOV NNW 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

    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 29/Aug/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.3 C
Minimum Air Temperature                     24.5 C
Grass Minimum Temperature                   24.1 C
Relative Humidity                        92 - 98 Percent
Rainfall                                    98.3 mm 
Total rainfall since 1st January          2236.8 mm
Against an average of                     1878.0 mm

Other Stations                Min                  Max
King's Park                  24.2 C               26.6 C
Wong Chuk Hang               24.3 C               27.2 C
Ta Kwu Ling                  24.4 C               26.8 C
Lau Fau Shan                 24.2 C               26.7 C
Tai Po                       24.2 C               27.0 C
Sha Tin                      24.8 C               27.8 C
Tuen Mun                     24.8 C               27.3 C
Tseung Kwan O                24.3 C               26.6 C
Sai Kung                     24.8 C               27.2 C
Cheung Chau                  24.2 C               25.8 C
Chek Lap Kok                 25.6 C               28.9 C
Tsing Yi                     24.6 C               27.6 C
Shek Kong                    24.6 C               27.9 C
Tsuen Wan Ho Koon            23.4 C               25.5 C
Tsuen Wan Shing Mun Valley   24.1 C               26.4 C
Hong Kong Park               23.8 C               27.4 C
Shau Kei Wan                 23.7 C               27.0 C
Kowloon City                 23.9 C               26.6 C
Happy Valley                 24.4 C               27.9 C
Wong Tai Sin                 23.9 C               26.4 C
Stanley                      24.1 C               27.1 C
Kwun Tong                    24.1 C               26.6 C
Sham Shui Po                 24.6 C               27.5 C
Kai Tak Runway Park          24.8 C               27.4 C
Yuen Long Park               25.1 C               27.7 C
Tai Mei Tuk               // C               // C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 0.6,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
Sea surface temperature (Waglan Island):        26.5 C 

Yesterday's (28 Aug 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.07 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                           0.07
Tap Mun                             0.08
Kat O                               0.09
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.12
Cape D'Aguilar                      0.12
Chek Lap Kok                        0.13

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 28 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <29 Aug 2017> 

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