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Bulletin issued at 16:21 HKT 13/Sep/2016

At 4 p.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 73 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang // degrees;
Ta Kwu Ling 30 degrees;
Lau Fau Shan 29 degrees;
Tai Po 29 degrees;
Sha Tin 30 degrees;
Tuen Mun 29 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 29 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 30 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 28 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 30 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 31 degrees;
Stanley 30 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 30 degrees.

Here is the information on Super Typhoon Meranti at 4 p.m.:
Location: 20.2 degrees north, 123.6 degrees east.


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


Climatological Information for 13 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 16:15 HKT 13/Sep/2016

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

The anticyclone over southern China is bringing generally fine weather to the region. Locally, temperatures over parts of the New Territories rose to about 33 degrees in the afternoon.

At 4 p.m., Super Typhoon Meranti was centred about 440 kilometres southeast of Gaoxiong. It is forecast to move west-northwest at about 22 kilometres per hour across the Luzon Strait. Meanwhile, Tropical Storm Malakas was centred about 600 kilometres north-northwest of Yap. It is forecast to move west-northwest at about 22 kilometres per hour in the general direction of the seas east of Taiwan. Tropical Depression Rai was centred about 300 kilometres west of Da Nang. It is forecast to move west at about 22 kilometres per hour across Indochina Peninsula, and dissipate gradually.

Weather forecast for tonight and tomorrow

Isolated showers. Very hot with sunny periods but some haze tomorrow. Isolated squally thunderstorms later. Temperatures will range between 26 and 33 degrees. Moderate easterly winds, becoming north to northwesterlies tomorrow.

Outlook : A few squally showers during the Mid-Autumn Festival, windier offshore and on high ground. Showers will ease off gradually on Friday.


(The above forecast period is valid up to 23:59 HKT tomorrow, 14/09/2016; 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 09:00 HKT 13/Sep/2016

HURRICANE WARNING AREAS: BASHI AND BALINTANG.
STORM WARNING AREA: TAIWAN STRAIT.
GALE WARNING AREAS: KWANGTUNG, PRATAS AND SCARBOROUGH.

GENERAL SITUATION AT 122100 UTC:
FOR DETAILS ON TROPICAL DEPRESSION RAI (1615), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 130100 UTC:

HONG KONG= E 4-5, BEC N TO NW 4-5. ISOL SHOWERS AND SQUALLY TS. SEA UP TO 2 M. TEMP 33-27 C. =
KWANGTUNG= E TO NE 4-5, BEC N TO NW 5-6, UP TO 8 IN E. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 6 M IN E LATER. SWELL E TO NE 2 M LATER. =
TAIWAN STRAIT= NE 6-7, 9-10 LATER. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, 8-10 M LATER. SWELL NE 2 M, UP TO 4 M LATER. =
BASHI= N 7-8, BEC CYCLONIC 12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 14 M LATER. SWELL E 2-3 M, UP TO 6 M LATER. =
PRATAS= NE 4-5, BEC N TO NW 7-8. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS LATER. SEA 2 M, 4-6 M LATER. SWELL E 2-3 M LATER. =
BALINTANG= N 7-8, BEC CYCLONIC 12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, 12-14 M LATER. SWELL E 2-3 M, UP TO 6 M LATER. =
SCARBOROUGH= W TO NW 5-6, BEC SW 7-8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, 4-6 M LATER. SWELL SW 2 M. =
PARACEL= E TO SE 4-5, UP TO 6 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 3 M AT FIRST. SWELL S TO SW 2 M. =
TONKIN= E TO NE 4-5, UP TO 6 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 3 M AT FIRST. =
DANANG= E TO SE 5-6, UP TO 7 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. =
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 16:30 HKT 13/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 13 September 2016

    Warnings:
    Storm force winds in Nan'ao. Gale force winds in Shanwei. Strong winds in south of Hong Kong.

    Weather Situation:
    At 4 p.m., Super Typhoon Meranti with maximum sustained winds of about 240 kilometres per hour near its centre was located at 20.2 degrees north, 123.6 degrees east, it is forecast to move west-northwest at about 22 kilometres per hour across the Luzon strait. Meanwhile, Tropical Depression Rai with maximum sustained winds of about 45 kilometres per hour near its centre was located at 15.9 degrees north, 105.4 degrees east, it is forecast to move west at about 22 kilometres per hour across Indochina Peninsula, and dissipate gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, becoming north to northwest force 4 to 5 later.
    Isolated showers and squally thunderstorms.
    Moderate seas.

    Nan'ao:
    East to northeast force 5 to 6, becoming north to northwest force 9 to 10.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas, becoming high later.

    Shanwei:
    East to northeast force 4 to 5, becoming north to northwest force 7 to 8.
    Scattered squally showers and thunderstorms.
    Moderate seas, becoming rough to very rough later.

    South of Hong Kong:
    East to northeast force 4 to 5, becoming north to northwest force 5 to 6 later.
    Isolated showers and squally thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 4 to 5, becoming north to northwest force 4 to 5 later.
    Isolated showers and squally thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    North to northwesterly winds of force 7 to 8, cyclonic winds of up to force 12 in east. Squally showers and thunderstorms.

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

    Waglan Island Wind east force 2
      Visibility 14 Kilometres

    Shantou Wind west-southwest force 2
      Visibility 30 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind east force 2
      Visibility 17 Kilometres

    Xisha Wind southeast force 2
      Visibility 30 Kilometres in showers

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 10:30 HKT 13/SEP/2016
    (Next update at 17:30 HKT 13/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS. 
     AT 10 A.M., TROPICAL DEPRESSION RAI WAS CENTRED 
     NEAR 15.9 DEGREES NORTH, 107.1 DEGREES EAST. IT 
     IS FORECAST TO MOVE WEST AT ABOUT 12 KNOTS ACROSS 
     INDOCHINA PENINSULA, AND DISSIPATE GRADUALLY. 

III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  080/15-20                            29-33
   B.   2000 FT:  080/15-20                            23
   C.   5000 FT:  050/15-20                            19
   D.  10000 FT:  070/15                               12
   E.  18000 FT:  140/10                               MS1
   F.  24000 FT:  130/10                               MS14
   G.  30000 FT:  160/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.  THERE WILL ALSO BE SOME ISOLATED
      SHOWERS AND THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT. 
      TEMPO FEW CB 1500 FT  SCT 2500 FT  BKN 5000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 12600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, BECOMING NORTH TO
     NORTHWESTERLY WINDS.  MAINLY FINE. THERE WILL
     ALSO BE A FEW ISLOCATED SHOWERS AND
     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
    Traditional Chinese Simplified Chinese

    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 19:45 HKT on 12 Sep 16

    VHHK SIGMET 4 VALID 121145/121545 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N2018 AND W OF E11430 TOP FL400 STNR 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
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 15:31 HKT 13/Sep/2016


    Tropical Cyclone Warning

    At 130600 UTC, Super Typhoon Meranti (1614) with central pressure 890 hectopascals was centred within 30 nautical miles of two zero point one degrees north (20.1 N) one two four point one degrees east (124.1 E) and is forecast to move west-northwest at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 130 knots.

    Radius of over 33 knot winds 180 nautical miles over eastern semicircle, 120 nautical miles elsewhere.
    Radius of over 47 knot winds 90 nautical miles.
    Radius of over 63 knot winds 60 nautical miles.
    Radius of over 2 metre waves 240 nautical miles.

    Forecast position and intensity at 140600 UTC
    Two one point four degrees north (21.4 N)
    One one nine point six degrees east (119.6 E)
    Maximum winds 120 knots.

    Forecast position and intensity at 150600 UTC
    Two three point six degrees north (23.6 N)
    One one six point two degrees east (116.2 E)
    Maximum winds 75 knots.

    Forecast position and intensity at 160600 UTC
    Two five point seven degrees north (25.7 N)
    One one four point nine degrees east (114.9 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 170600 UTC
    Dissipated over land.

    Bulletin issued at 09:30 HKT 13/Sep/2016


    Tropical Cyclone Warning

    At 130000 UTC, Tropical Depression Rai (1615) with central pressure 998 hectopascals was centred within 90 nautical miles of one five point nine degrees north (15.9 N) one zero seven point five degrees east (107.5 E) and is forecast to weaken and move west at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 30 knots.

    Radius of over 2 metre waves 120 nautical miles.

    No further warnings on this Tropical Depression will be issued by the Hong Kong Observatory unless it re-enters the Hong Kong area of responsibility.

    Forecast position and intensity at 140000 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 13/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.7 C
Minimum Air Temperature                     26.0 C
Grass Minimum Temperature                   25.6 C
Relative Humidity                        68 - 95 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2208.8 mm
Against an average of                     2038.6 mm

Other Stations                Min                  Max
King's Park                  25.6 C               32.7 C
Ta Kwu Ling                  23.5 C               33.7 C
Lau Fau Shan                 24.5 C               33.3 C
Tai Po                       24.8 C               31.9 C
Sha Tin                      24.1 C               32.5 C
Tuen Mun                     25.2 C               32.2 C
Tseung Kwan O                24.3 C               32.6 C
Sai Kung                     25.2 C               32.2 C
Cheung Chau                  25.0 C               29.6 C
Chek Lap Kok                 25.8 C               32.9 C
Tsing Yi                     24.8 C               32.4 C
Shek Kong                    24.2 C               34.3 C
Tsuen Wan Ho Koon            23.6 C               31.3 C
Tsuen Wan Shing Mun Valley   24.1 C               32.7 C
Hong Kong Park               24.9 C               32.0 C
Shau Kei Wan                 25.7 C               31.4 C
Kowloon City                 25.6 C               32.4 C
Happy Valley                 25.4 C               34.4 C
Wong Tai Sin                 24.7 C               33.9 C
Stanley                      26.0 C               31.8 C
Kwun Tong                    25.9 C               31.9 C
Sham Shui Po                 25.7 C               32.7 C
Kai Tak Runway Park          26.4 C               31.4 C
Yuen Long Park               24.5 C               33.8 C

Duration of sunshine (King's Park):              10.5 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.
 

Yesterday's (12 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 12 Sep
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