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Bulletin issued at 11:02 HKT 14/Sep/2016

At 11 a.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 62 per cent.
During the past hour the mean UV Index recorded at King's Park was 7. The intensity of UV radiation was high.

Please be reminded that:

The Tropical Cyclone Signal No. 1 has been issued.
The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

King's Park 31 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 31 degrees;
Lau Fau Shan 30 degrees;
Tai Po 29 degrees;
Sha Tin 31 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 31 degrees;
Sai Kung 30 degrees;
Cheung Chau 29 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 31 degrees;
Shek Kong 32 degrees;
Tsuen Wan Ho Koon 29 degrees;
Tsuen Wan Shing Mun Valley 31 degrees;
Hong Kong Park 31 degrees;
Shau Kei Wan 31 degrees;
Kowloon City 30 degrees;
Happy Valley 33 degrees;
Wong Tai Sin 30 degrees;
Stanley 31 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 31 degrees;
Yuen Long Park 32 degrees.

Here is the information on Super Typhoon Meranti:
Location: 21.8 degrees north, 120.3 degrees east; Maximum sustained wind near its centre: 210 km/h.


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


Climatological Information for 14 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 10:45 HKT 14/Sep/2016

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

Weather forecast for today

Mainly fine and very hot apart from some haze. Becoming cloudy with isolated showers and a few thunderstorms later. Light to moderate north to northwesterly winds.

Outlook : A few showers during the Mid-Autumn Festival. Becoming brighter gradually on Friday.


(The above forecast period is valid up to 23:59 HKT today, 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 14/Sep/2016

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

GENERAL SITUATION AT 132100 UTC:
FOR DETAILS ON SUPER TYPHOON MERANTI (1614), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 140100 UTC:

HONG KONG= N TO NW 5-6. SOME HAZE AT FIRST, DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS LATER. SEA 2-3 M. TEMP 33-26 C. =
KWANGTUNG= N TO NW 5-6, UP TO 10 IN E LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS IN E. SEA 2-3 M, UP TO 10 M IN E LATER. SWELL E TO NE 2-3 M LATER. =
TAIWAN STRAIT= CYCLONIC 12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 14 M. SWELL S TO SW 6 M. =
BASHI= CYCLONIC 12, S TO SW 7-8 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 14 M, 4-6 M LATER. SWELL S TO SW 4-6 M. =
PRATAS= N TO NW 9-10. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 8-10 M. SWELL W TO SW 4-6 M. =
BALINTANG= S TO SW 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL S TO SW 4-6 M. =
SCARBOROUGH= W 7-8, BEC SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M, 2-3 M LATER. SWELL SW 2-3 M. =
PARACEL= SW 4-5, BEC W TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
TONKIN= NE 4, BEC N TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= N TO NE 4, BEC N TO NW 4-5. 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

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    Bulletin issued at 10:15 HKT 14/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 10:15 a.m. on 14 September 2016

    Warnings:
    Hurricane force winds in Nan'ao. Storm force winds in Shanwei. Strong winds in Hong Kong adjacent waters, south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    At 10 a.m., Super Typhoon Meranti with maximum sustained winds of about 220 kilometres per hour near its centre was located at 21.7 degrees north, 120.5 degrees east, it is forecast to move northwest or west-northwest at about 22 kilometres per hour towards the coast of Fujian.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northwest force 5 to 6.
    Some haze at first. Isolated squally showers and thunderstorms later.
    Moderate to rough seas.

    Nan'ao:
    North to northwest force 6 to 7, becoming cyclonic force 12 later.
    Frequent heavy squally showers and thunderstorms.
    Rough seas, becoming phenomenal later.

    Shanwei:
    North to northwest force 6 to 7, up to force 10 later.
    Frequent heavy squally showers and thunderstorms.
    Rough seas, becoming high later.

    South of Hong Kong:
    North to northwest force 5 to 6, occasionally force 7.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    North to northwest force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    West to southwesterly winds of force 4 to 5, force 7 to 8 in east at first. Squally showers and thunderstorms.

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

    Waglan Island Wind north force 4
      Visibility 17 Kilometres

    Shantou Wind west-southwest force 1
      Visibility 30 Kilometres

    Dongsha Wind west-northwest force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind northwest force 5

    Macau Wind north-northwest force 2
      Visibility 12 Kilometres

    Xisha Wind southwest force 2
      Visibility 30 Kilometres

  • 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 09:00 HKT 14/SEP/2016
    (Next update at 17:30 HKT 14/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS, SEV TURB AND SEV GUSTS. ISOL
     CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 9 AM, SUPERT. MERANTI WAS CENTERED NEAR 21.6N
     120.7E AND IS FORECAST TO MOVE NW/WNW AT 12
     KNOTS CROSSING THE LUZON STRAIT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  330/15-20
                  VRB/25G35 IN TS
       OFFSHORE:  330/20-25                            33-28
   B.   2000 FT:  360/15-20, 25G35 LATER               23
   C.   5000 FT:  360/15-20, 25 LATER                  21
   D.  10000 FT:  330/15-20, 25 LATER                  13
   E.  18000 FT:  010/10-15, 20 LATER                  MS2
   F.  24000 FT:  010/15-20                            MS14
   G.  30000 FT:  010/15-20                            MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE APART FROM LOCALIZED HAZE.  ISOL
      SQUALLY SHOWERS AND TS LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 8000 FT.
      TEMPO FEW CB 1500FT SCT 2500KT BKN 5000FT
   K. VISIBILITY    : 8 KM.  TEMPO 4000 M IN HAZE.  TEMPO 2000M IN ISOL SHOWERS AND TS
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG WEST TO NORTHWESTERLY WINDS.
     CLOUDY WITH ISOLATED SQUALL 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 17:10 HKT on 13 Sep 16

    VHHK SIGMET 1 VALID 130910/131310 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1906 E11600 - N1812 E11512 - N1930 E11130 - N2042 E11130 - N1906 E11600 TOP FL400 MOV WNW 05KT NC=

    Please click here for more about the SIGMET

    TROPICAL CYCLONE WARNING Skip to main content
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    Tropical Cyclone Warnings

    Bulletin issued at 10:45 HKT 14/Sep/2016

    Tropical Cyclone Bulletin

    Here is the latest Tropical Cyclone Bulletin issued by the Hong Kong Observatory.

    The Standby Signal, No. 1 is in force.

    This means that a tropical cyclone now centred within about 800 kilometres of Hong Kong may affect us.

    At 11 a.m., Super Typhoon Meranti was estimated to be about 640 kilometres east of Hong Kong (near 21.8 degrees north 120.3 degrees east) and is forecast to move northwest or west-northwest at about 22 kilometres per hour towards the coast of Fujuan.

    Meranti took on a more northwesterly track this morning. It will move across Taiwan Strait, and edge closer to the coast of Fujian. According to the present forecast track, local winds today are not expected to strengthen significantly and the chance of issuing the Strong Wind Signal No.3 today is not high. Meranti is expected to be closest to Hong Kong tomorrow morning, skirting around 400km to the east of the territory. There will be occasionally strong winds over offshore waters and on high ground tonight and tomorrow morning.

    (Precautionary Announcements with No. 1 Signal)

    1. Those who have definite duties during a tropical cyclone should now remain on call or contact their control centres from time to time.

    2. If you are planning to visit Guangdong, Macau, any of the off-shore islands or remote parts of Hong Kong, you are reminded that changes in weather may affect your plans.

    3. Since there may be swells, you are advised to stay away from the shoreline and not to engage in water sports.

    4. All small vessels including low power vessels and fishing vessels in open sea should seek shelter as soon as possible. Please take any precautions necessary for small vessels and secure them properly with moorings.

    5. Listen to radio, watch TV or browse the Hong Kong Observatory's web site for information on the tropical cyclone.
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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 09:30 HKT 14/Sep/2016


    Tropical Cyclone Warning

    At 140000 UTC, Super Typhoon Meranti (1614) with central pressure 905 hectopascals was centred within 30 nautical miles of two one point five degrees north (21.5 N) one two zero point eight degrees east (120.8 E) and is forecast to move northwest or west-northwest at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 120 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 210 nautical miles.

    Forecast position and intensity at 150000 UTC
    Two four point two degrees north (24.2 N)
    One one seven point three degrees east (117.3 E)
    Maximum winds 65 knots.

    Forecast position and intensity at 160000 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 14/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.9 C
Minimum Air Temperature                     26.0 C
Grass Minimum Temperature                   26.0 C
Relative Humidity                        73 - 96 Percent
Rainfall                                     8.5 mm 
Total rainfall since 1st January          2217.3 mm
Against an average of                     2055.1 mm

Other Stations                Min                  Max
King's Park                  25.7 C               30.9 C
Ta Kwu Ling                  25.2 C               32.1 C
Lau Fau Shan                 25.5 C               33.4 C
Tai Po                       26.2 C               30.7 C
Sha Tin                      25.6 C               31.0 C
Tuen Mun                     26.1 C               30.1 C
Tseung Kwan O                25.0 C               30.1 C
Sai Kung                     25.8 C               29.5 C
Cheung Chau                  26.1 C               28.9 C
Chek Lap Kok                 27.5 C               33.0 C
Tsing Yi                     25.8 C               31.2 C
Shek Kong                    25.4 C               32.3 C
Tsuen Wan Ho Koon            25.1 C               29.8 C
Tsuen Wan Shing Mun Valley   25.4 C               31.3 C
Hong Kong Park               25.8 C               30.4 C
Shau Kei Wan                 25.3 C               29.4 C
Kowloon City                 25.7 C               31.0 C
Happy Valley                 26.8 C               31.8 C
Wong Tai Sin                 26.0 C               31.2 C
Stanley                      26.0 C               29.7 C
Kwun Tong                    26.2 C               30.2 C
Sham Shui Po                 26.2 C               31.2 C
Kai Tak Runway Park          26.7 C               29.6 C
Yuen Long Park               25.4 C               32.3 C

Duration of sunshine (King's Park):              5.0 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 11.
 

Yesterday's (13 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                             0.08
Kat O                               0.09
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.12
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 13 Sep
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