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Bulletin issued at 07:31 HKT 11/Sep/2017

At 7 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 86 per cent.

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


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


Climatological Information for 11 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 06:45 HKT 11/Sep/2017

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

An anticyclone aloft is bringing generally fine weather to southeastern China.

At 5 a.m., Severe Tropical Storm Talim was centred about 1740 kilometres east of Manila. It is forecast to move west-northwest at about 25 kilometres per hour across the western North Pacific towards the vicinity of Taiwan to Luzon Strait and intensify gradually.

Weather forecast for today

Mainly fine apart from isolated showers. Hot during the day with a maximum temperature of around 32 degrees. Light to moderate southerly winds.

Outlook : Sunny periods and a few showers in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 11/09/2017; 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 10/Sep/2017

N0 WARNING.

GENERAL SITUATION AT 100900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 101300 UTC:

HONG KONG= S 4-5. ISOL SHOWERS. SEA UP TO 2 M. TEMP 27-32 C. =
KWANGTUNG= S 4-5, E UP TO 5 IN E LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= S TO SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BASHI= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
PRATAS= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
SCARBOROUGH= NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= SE 5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= SE 5. 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
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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 05:30 HKT 11/Sep/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 11 September 2017

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4 to 5.
    Isolated showers.
    Moderate seas.

    Nan'ao and Shanwei:
    South force 4 to 5, becoming east up to force 5 later.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    South force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6, up to force 7 in east later. Isolated squally showers and thunderstorms.

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

    Shantou Wind south-southwest force 2
      Visibility 30 Kilometres

    Macau Wind southwest force 1
      Visibility 30 Kilometres

    Xisha Wind east 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 01:30 HKT 11/SEP/2017
    (Next update at 9:00-9:30 HKT 11/SEP/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY AIRSTREAM IS AFFECTING THE COAST OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  180/5-10                             27-33
   B.   2000 FT:  200/10                               24
   C.   5000 FT:  300/10                               20
   D.  10000 FT:  270/10                               12
   E.  18000 FT:  130/10                               MS3
   F.  24000 FT:  070/15                               MS13
   G.  30000 FT:  070/20                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE APART FROM ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT.  TEMPO FEW CB 1000 FT  SCT 2000 FT
      BKN 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 11500 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHERLY WINDS.  MAINLY FINE
     APART FROM ISOLATED SHOWERS.=

    ===================================================================
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 15:26 HKT on 09 Sep 17

    VHHK SIGMET 2 VALID 090717/091115 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF LINE N2036 E11430 - N2036 E11130 AND W OF E11430 TOP FL350 MOV NE 10KT NC= VHHK SIGMET 4 VALID 090726/091115 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N2030 W OF E11430 TOP FL350 MOV NE 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 11/Sep/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.2 C
Minimum Air Temperature                     26.7 C
Grass Minimum Temperature                   24.9 C
Relative Humidity                        64 - 95 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2348.1 mm
Against an average of                     2022.5 mm

Other Stations                Min                  Max
King's Park                  26.5 C               32.0 C
Wong Chuk Hang               26.1 C               31.4 C
Ta Kwu Ling                  25.8 C               33.1 C
Lau Fau Shan                 25.8 C               32.4 C
Tai Po                       25.8 C               31.0 C
Sha Tin                      25.7 C               33.3 C
Tuen Mun                     26.4 C               32.1 C
Tseung Kwan O                25.8 C               33.9 C
Sai Kung                     25.9 C               31.2 C
Cheung Chau                  26.0 C               33.8 C
Chek Lap Kok                 27.4 C               33.5 C
Tsing Yi                     26.1 C               32.0 C
Shek Kong                    25.8 C               33.7 C
Tsuen Wan Ho Koon            25.4 C               31.1 C
Tsuen Wan Shing Mun Valley   25.6 C               32.5 C
Hong Kong Park               26.2 C               32.6 C
Shau Kei Wan                 26.2 C               32.4 C
Kowloon City                 26.5 C               32.9 C
Happy Valley                 26.6 C               32.7 C
Wong Tai Sin                 25.9 C               32.6 C
Stanley                      26.2 C               32.4 C
Kwun Tong                    27.0 C               32.8 C
Sham Shui Po                 26.5 C               32.5 C
Kai Tak Runway Park          26.9 C               32.8 C
Yuen Long Park               26.5 C               32.7 C
Tai Mei Tuk               25.8 C               32.4 C

Duration of sunshine (King's Park):              8.3 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 11.
Sea surface temperature (Waglan Island):        27.4 C 

Yesterday's (10 Sep 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                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.12
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 10 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <11 Sep 2017> 

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