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Bulletin issued at 23:02 HKT 05/Sep/2017

At 11 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 86 per cent.

The air temperatures at other places were:

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

Between 9:45 and 10:45 p.m., the rainfall recorded in various regions were:

Islands District 0 to 15 mm.


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


Climatological Information for 5 Sep

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Bulletin updated at 23:15 HKT 05/Sep/2017

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

Showers affected Guangdong and the northern part of the South China Sea today. Locally, it was mainly cloudy with showers. More than 20 millimetres of rainfall were recorded over parts of the territory in the morning, and rainfall even exceeded 50 millimetres over the northern part of Lantau Island and Tsing Yi. Sunny intervals in the afternoon. The area of low pressure now affecting the Luzon Strait will enter the northeastern part of the South China Sea and may intensify slightly tomorrow. However, its intensity and movement remain uncertain. The associated unsettled weather will affect the northeastern part of the South China Sea in the next couple of days.

Weather forecast for Hong Kong (Wednesday, 6 Sep 2017)

Mainly cloudy with a few showers. The minimum temperature will be about 27 degrees. Sunny periods during the day with a maximum temperature of around 32 degrees. Moderate south to southwesterly winds.

Outlook : Sunny intervals and a few showers in the following couple of days. Becoming fine early next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 06/09/2017; 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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Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 05/Sep/2017

N0 WARNING.

GENERAL SITUATION AT 050900 UTC:
LOW 1002 HPA 20N 123E WNW 10 KT INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 051300 UTC:

HONG KONG= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. TEMP 27-32 C. =
KWANGTUNG= SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= W TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= NE 5-6, SW 5-6 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
PRATAS= W TO SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
BALINTANG= NW 5-6, BEC SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
SCARBOROUGH= W TO SW 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL NE UP TO 2 M. =
PARACEL= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S TO SW 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 23:30 HKT 05/Sep/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 05 September 2017

    Weather Situation:
    A southwesterly airstream is affecting the south China coastal waters. Besides, an area of low pressure is bringing unsettled weather to the seas near Luzon.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    Nan'ao and Shanwei:
    West to southwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

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

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

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

    Waglan Island Wind south-southwest force 2
      Visibility 13 Kilometres

    Shantou Wind south force 2
      Visibility 22 Kilometres

    Dongsha Wind west-southwest force 2
      Visibility 10 Kilometres

    Macau Wind south force 2
      Visibility 15 Kilometres

    Xisha Wind south force 2
      Visibility 23 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 05/SEP/2017
    (Next update at 01:30 HKT 06/SEP/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.  BESIDES, AN AREA OF LOW
     PRESSURE IS BRINGING UNSETTLED WEATHER TO THE
     SEAS NEAR LUZON.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  200/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  200/15                               30-27
   B.   2000 FT:  200/15                               23
   C.   5000 FT:  200/10                               20
   D.  10000 FT:  200/10                               12
   E.  18000 FT:  120/10                               MS2
   F.  24000 FT:  090/15                               MS13
   G.  30000 FT:  100/20                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS.  ISOLATED
      THUNDERSTORMS OVER INLAND AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 2500 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5 M         SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS.  SUNNY
     PERIODS AND A FEW 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 22:26 HKT on 05 Sep 17

    VHHK SIGMET 1 VALID 051426/051820 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2042 E11712 - N1906 E11554 - N2012 E11412 - N2100 E11506 - N2042 E11712 TOP FL450 MOV WSW 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 05/Sep/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.6 C
Minimum Air Temperature                     25.3 C
Grass Minimum Temperature                   24.5 C
Relative Humidity                        81 - 95 Percent
Rainfall                                    32.8 mm 
Total rainfall since 1st January          2313.0 mm
Against an average of                     1949.0 mm

Other Stations                Min                  Max
King's Park                  24.9 C               27.3 C
Wong Chuk Hang               25.0 C               27.5 C
Ta Kwu Ling                  25.1 C               27.4 C
Lau Fau Shan                 24.3 C               27.0 C
Tai Po                       25.1 C               28.2 C
Sha Tin                      25.4 C               28.0 C
Tuen Mun                     24.9 C               27.4 C
Tseung Kwan O                25.0 C               28.7 C
Sai Kung                     25.7 C               28.4 C
Cheung Chau                  24.2 C               26.3 C
Chek Lap Kok                 25.5 C               29.4 C
Tsing Yi                     25.2 C               27.6 C
Shek Kong                    24.9 C               27.7 C
Tsuen Wan Ho Koon            24.2 C               26.1 C
Tsuen Wan Shing Mun Valley   24.7 C               27.0 C
Hong Kong Park               24.8 C               27.2 C
Shau Kei Wan                 25.0 C               28.6 C
Kowloon City                 24.4 C               28.2 C
Happy Valley                 25.4 C               29.1 C
Wong Tai Sin                 24.6 C               28.2 C
Stanley                      24.9 C               27.7 C
Kwun Tong                    25.0 C               28.2 C
Sham Shui Po                 25.0 C               27.5 C
Kai Tak Runway Park          25.5 C               28.4 C
Yuen Long Park               25.6 C               28.5 C
Tai Mei Tuk               24.9 C               27.6 C

Duration of sunshine (King's Park):              0.2 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
Sea surface temperature (Waglan Island):        27.1 C 

Yesterday's (04 Sep 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.15 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                           0.09
Tap Mun                             0.10
Kat O                               0.09
Yuen Ng Fan                         0.13
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.11
Kwun Tong                           0.12
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.14
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 04 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <05 Sep 2017> 

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