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Bulletin issued at 22:15 HKT 11/Sep/2016

At 10 p.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 85 per cent.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang // 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 26 degrees;
Sai Kung 27 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 27 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan // degrees;
Kowloon City 28 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 26 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 26 degrees.

Between 8:45 and 9:45 p.m., lightning was detected within Lantau. The rainfall recorded in various regions were:

Islands District 0 to 34 mm;
Kwai Tsing 0 to 25 mm;
Tsuen Wan 0 to 16 mm;
Sham Shui Po 0 to 9 mm;
Yuen Long 0 to 5 mm;
Sha Tin 0 to 4 mm;
Tuen Mun 0 to 4 mm;
Sai Kung 0 to 3 mm;
Eastern District 0 to 2 mm.


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


Local Weather Forecast
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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 21:45 HKT 11/Sep/2016

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

A trough of low pressure is bringing showers to the coastal areas of Guangdong.

Besides, Severe Tropical Storm Meranti has intensified into a typhoon. At 10 p.m., Meranti was centred about 1420 kilometres east-southeast of Gaoxiong. It is forecast to move west-northwest at about 24 kilometres per hour in the general direction of the seas east of Luzon to Taiwan and continue to intensify.

Weather forecast for tonight and tomorrow

Mainly cloudy with isolated showers. There will be one or two thunderstorms at first. Hot with sunny periods tomorrow with temperatures ranging between 27 and 32 degrees. Light winds, becoming moderate easterly winds.

Outlook : Mainly fine and hot in the following couple of days. A few squally thunderstorms during the Mid-Autumn Festival and the day after.


(The above forecast period is valid up to 23:59 HKT tomorrow, 12/09/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 11/Sep/2016

N0 WARNING.

GENERAL SITUATION AT 110900 UTC:
TROUGH 20N 109E 23N 113E 24N 118E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 111300 UTC:

HONG KONG= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 27-32 C. =
KWANGTUNG= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= E TO SE 4-5, BEC NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= E TO SE 4-5, NE 5 LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
PRATAS= S TO SE 4, BEC E UP TO 5. ISOL SHOWERS. SEA UP TO 2 M. =
BALINTANG= SE 4-5, NE 5 LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
SCARBOROUGH= S TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL S UP TO 2 M. =
PARACEL= E 4-5, 6-7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-4 M. SWELL E UP TO 2 M. =
TONKIN= SE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M. =
DANANG= E TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 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 19:30 HKT 11/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 11 September 2016

    Weather Situation:
    A trough of low pressure continues to bring unsettled weather to the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to southeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East to southeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 5 to 6, becoming northerly winds of force 6 later. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind south-southeast force 1
      Visibility 35 Kilometres

    Shantou Wind south-southeast force 1
      Visibility 14 Kilometres

    Dongsha Wind northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-southeast force 2

    Macau Wind south force 1
      Visibility 27 Kilometres

    Xisha Wind east-northeast force 3
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
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    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 11/SEP/2016
    (Next update at 01:30 HKT 12/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING SHOWERS TO
     THE COASTAL AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  110/10-15                            31-27
   B.   2000 FT:  110/10-15                            22
   C.   5000 FT:  180/10                               19
   D.  10000 FT:  180/10                               11
   E.  18000 FT:  160/10                               MS2
   F.  24000 FT:  100/10                               MS12
   G.  30000 FT:  070/10                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. ISOLATED
      THUNDERSTORMS AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 3000 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) : 11400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS.  MAINLY CLOUDY WITH
     ISOLATED SHOWERS. SUNNY PERIODS DURING THE DAY.=

    ===================================================================
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 20:45 HKT on 11 Sep 16

    VHHK SIGMET 1 VALID 111245/111645 VHHH- VHHK HONG KONG FIR EMBD TS FCST NW OF LINE N2312 E11730 - N2030 E11130 TOP FL400 MOV NNE 05KT 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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
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    Severe Weather Information Centre

    Bulletin issued at 21:30 HKT 19/Aug/2016


    Tropical Cyclone Warning

    At 191200 UTC, Tropical Storm Dianmu (1608) with central pressure 988 hectopascals was centred within 60 nautical miles of two zero point eight degrees north (20.8 N) one zero five point four degrees east (105.4 E) and is forecast to weaken and move west at about 14 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 60 nautical miles over eastern semicircle, 30 nautical miles elsewhere.
    Radius of over 2 metre waves 150 nautical miles.

    No further warnings on this Tropical Storm will be issued by the Hong Kong Observatory unless re-intensification takes place.

    Forecast position and intensity at 201200 UTC
    Dissipated over land.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

    Tropical Cyclone Track
    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/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.7 C
Minimum Air Temperature                     24.5 C
Grass Minimum Temperature                   24.9 C
Relative Humidity                        88 - 98 Percent
Rainfall                                    53.2 mm 
Total rainfall since 1st January          2202.2 mm
Against an average of                     2022.5 mm

Other Stations                Min                  Max
King's Park                  24.3 C               27.7 C
Ta Kwu Ling                  24.4 C               29.4 C
Lau Fau Shan                 24.5 C               28.8 C
Tai Po                       24.4 C               28.6 C
Sha Tin                      23.8 C               27.7 C
Tuen Mun                     24.6 C               28.2 C
Tseung Kwan O                24.3 C               27.2 C
Sai Kung                     24.5 C               28.2 C
Cheung Chau                  23.8 C               27.5 C
Chek Lap Kok                 24.8 C               28.8 C
Tsing Yi                     24.5 C               28.8 C
Shek Kong                    24.3 C               29.3 C
Tsuen Wan Ho Koon            24.0 C               26.8 C
Tsuen Wan Shing Mun Valley   24.3 C               28.5 C
Hong Kong Park               24.1 C               27.9 C
Shau Kei Wan                 24.5 C               27.8 C
Kowloon City                 24.2 C               28.3 C
Happy Valley                 24.8 C               29.2 C
Wong Tai Sin                 24.6 C               28.4 C
Stanley                      24.6 C               28.7 C
Kwun Tong                    24.7 C               28.6 C
Sham Shui Po                 24.5 C               28.8 C
Kai Tak Runway Park          25.1 C               28.4 C
Yuen Long Park               24.4 C               28.8 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 0.8,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (10 Sep 2016) 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                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2015, 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
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