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Bulletin issued at 22:02 HKT 29/Aug/2017

At 10 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 74 per cent.

The air temperatures at other places were:

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


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 21:45 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, the broad area of low pressure over the seas east of Luzon is bringing unsettled weather to the region.

Weather forecast for tonight and tomorrow

Mainly fine. The minimum temperature will be about 27 degrees tomorrow morning. Very hot during the day. The maximum temperature will be around 33 degrees. Light winds.

Outlook : Very hot with sunny periods on Thursday. Becoming showery gradually in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 30/08/2017; 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 29/Aug/2017

N0 WARNING.

GENERAL SITUATION AT 290900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 291300 UTC:

HONG KONG= E TO NE 2-3, OCNL 4. FINE. TEMP 27-33 C. =
KWANGTUNG= E TO NE 3-4, OCNL 5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 5-6. ISOL SHOWERS. SEA 2-3 M. =
BASHI= NE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PRATAS= NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
BALINTANG= NE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
SCARBOROUGH= N TO NE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PARACEL= E 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS IN W. 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= E TO 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 19:30 HKT 29/Aug/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 29 August 2017

    Weather Situation:
    An easterly airstream is affecting the coastal waters of Guangdong. Meanwhile, the broad area of low pressure over the seas east of Luzon is bringing unsettled weather to the region.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 2 to 3, occasionally force 4.
    Slight to moderate seas.

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

    Shanwei and South of Hong Kong:
    East to northeast force 3 to 4, occasionally force 5.
    Slight to moderate seas.

    Shangchuan Dao:
    East force 3 to 4, occasionally force 5.
    Isolated showers and thunderstorms.
    Slight to moderate seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 4 to 5, up to force 6 later. Isolated showers and thunderstorms.

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

    Waglan Island Wind west-southwest force 3
      Visibility 45 Kilometres

    Shantou Wind southeast force 2
      Visibility 24 Kilometres

    Dongsha Wind north force 3
      Visibility 10 Kilometres

    Macau Wind north force 1
      Visibility 29 Kilometres

    Xisha Wind south-southwest force 1
      Visibility 30 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 17:30 HKT 29/AUG/2017
    (Next update at 01:30 HKT 30/AUG/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG. MEANWHILE, THE BROAD AREA OF
     LOW PRESSURE OVER THE SEAS EAST OF LUZON IS
     BRINGING UNSETTLED WEATHER TO THE REGION.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/5-10
       OFFSHORE:  080/10-15                            31-27
   B.   2000 FT:  070/10                               25
   C.   5000 FT:  070/15                               20
   D.  10000 FT:  080/15                               12
   E.  18000 FT:  090/15                               MS4
   F.  24000 FT:  100/15                               MS13
   G.  30000 FT:  120/15                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE EAST TO NORTHEASTERLY 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 11:20 HKT on 29 Aug 17

    VHHK SIGMET 1 VALID 290320/290720 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1948 E11130 - N2124 E11130 - N2154 E11230 - N2012 E11230 - N1948 E11130 TOP FL420 MOV NNW 10KT NC= 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          2244.4 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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