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Bulletin issued at 03:02 HKT 12/Sep/2017

At 3 a.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 82 per cent.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 27 degrees;
Tai Po 27 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 28 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 27 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 28 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 27 degrees;
Stanley 28 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 28 degrees.


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


Climatological Information for 12 Sep

Regional Weather in Hong Kong

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Bulletin updated at 02:45 HKT 12/Sep/2017

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

Under the influence of the anticyclone aloft, it is generally fine over southeastern China. Besides, the area of low pressure near the Philippines is bringing unsettled weather to the region.

At 2 a.m., Typhoon Talim was centred about 1170 kilometres east-southeast of Taibei. It is forecast to move west-northwest at about 28 kilometres per hour across the western North Pacific towards the vicinity of Taiwan and intensify gradually.

Weather forecast for today

Mainly fine apart from one or two showers. The minimum temperature will be about 27 degrees. It will be hot during the day. The maximum temperature will be around 32 degrees in the urban areas, and a couple of degrees higher in the New Territories. Isolated thunderstorms later. Light winds.

Outlook : Very hot with sunny periods and a few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 12/09/2017; 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 11/Sep/2017

N0 WARNING.

GENERAL SITUATION AT 110900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS. LOW 1004 HPA 15N 124E W 12 KT INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 111300 UTC:

HONG KONG= S 4-5, BEC E TO NE UP TO 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 27-32 C. =
KWANGTUNG= S 4-5, BEC E TO NE UP TO 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= S 4-5, BEC NE 6-7. ISOL SHOWERS. SEA UP TO 2 M, BEC 3-4 M. =
BASHI= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL E 2-3 M LATER. =
PRATAS= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
BALINTANG= E TO NE 5-6, OCNL 7 LATER. ISOL SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. SWELL E 2-3 M LATER. =
SCARBOROUGH= N TO NE 5-6, OCNL 7 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. =
PARACEL= S 4-5, BEC NE 5-6. ISOL SHOWERS AND TS. SEA UP TO 2 M, BEC 2-3 M. =
TONKIN= S 4-5, BEC NE UP TO 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= SE 4-5, BEC NE UP TO 5. ISOL 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
  • 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 03:30 HKT 12/Sep/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 12 September 2017

    Warnings:
    Strong winds in Nan'ao and Shanwei.

    Weather Situation:
    A southerly airstream is affecting the south China coastal waters. Besides, the area of low pressure near the Philippines is bringing unsettled weather to the region.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4, becoming east to northeast up to force 5.
    A few showers. Isolated thunderstorms later.
    Moderate seas.

    Nan'ao and Shanwei:
    South force 4, becoming east to northeast force 5 to 6.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    South force 4, becoming east to northeast up to force 5.
    Isolated showers and thunderstorms.
    Moderate seas.

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

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

    Waglan Island Wind variable force 1
      Visibility 26 Kilometres

    Shantou Wind west-southwest force 1
      Visibility 14 Kilometres

    Macau Wind calm
      Visibility 22 Kilometres

    Xisha Wind calm
      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 12/SEP/2017
    (Next update at 9:00-9:30 HKT 12/SEP/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     UNDER THE INFLUENCE OF THE ANTICYCLONE ALOFT, THE WEATHER
     IS GENERALLY FINE OVER SOUTHEASTERN CHINA. MEANWHILE, THE
     AREA OF LOW PRESSURE NEAR THE PHILIPPINES IS BRINGING
     UNSETTLED WEATHER TO THE REGION.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5
                  BEC 360/5-10
                  TEMPO VRB/15G25 IN TS                27-34
   B.   2000 FT:  020/10                               25
   C.   5000 FT:  060/10                               21
   D.  10000 FT:  080/10                               12
   E.  18000 FT:  080/10                               MS1
   F.  24000 FT:  140/15                               MS13
   G.  30000 FT:  140/25                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE APART FROM A FEW SHOWERS. ISOLATED
      THUNDERSTORMS OVER INLAND LATER.
   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.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 1.0 M         SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTH TO NORTHEASTERLY WINDS.
     MAINLY FINE. A FEW SHOWERS AND ISOLATED 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 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 12/Sep/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.4 C
Minimum Air Temperature                     27.6 C
Grass Minimum Temperature                   26.7 C
Relative Humidity                        61 - 88 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2348.1 mm
Against an average of                     2031.2 mm

Other Stations                Min                  Max
King's Park                  27.3 C               32.5 C
Wong Chuk Hang               26.1 C               32.1 C
Ta Kwu Ling                  24.7 C               34.7 C
Lau Fau Shan                 26.1 C               32.4 C
Tai Po                       25.7 C               32.8 C
Sha Tin                      26.1 C               33.9 C
Tuen Mun                     26.1 C               33.4 C
Tseung Kwan O                25.9 C               32.9 C
Sai Kung                     26.7 C               32.3 C
Cheung Chau                  26.6 C               34.4 C
Chek Lap Kok                 27.0 C               33.5 C
Tsing Yi                     26.0 C               32.4 C
Shek Kong                    25.5 C               34.6 C
Tsuen Wan Ho Koon            24.9 C               31.5 C
Tsuen Wan Shing Mun Valley   25.3 C               33.3 C
Hong Kong Park               26.5 C               32.6 C
Shau Kei Wan                 27.0 C               32.3 C
Kowloon City                 27.2 C               34.1 C
Happy Valley                 26.4 C               33.8 C
Wong Tai Sin                 26.1 C               33.5 C
Stanley                      26.7 C               32.8 C
Kwun Tong                    27.4 C               32.6 C
Sham Shui Po                 27.2 C               33.4 C
Kai Tak Runway Park          27.4 C               32.9 C
Yuen Long Park               26.1 C               35.1 C
Tai Mei Tuk               26.2 C               34.2 C

Duration of sunshine (King's Park):              10.8 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 10.
Sea surface temperature (Waglan Island):        27.5 C 

Yesterday's (11 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                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.11
Sai Wan Ho                          0.08
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 11 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <12 Sep 2017> 

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