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Bulletin issued at 10:02 HKT 15/Sep/2016

At 10 a.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 67 per cent.
During the past hour the mean UV Index recorded at King's Park was 4. The intensity of UV radiation was moderate.

Hot weather might cause adverse health effects. The Observatory advises the public to stay on the alert.

Please be reminded that:

The Fire Danger Warning is Yellow and the fire risk is high.

The air temperatures at other places were:

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

Here is the information on Typhoon Meranti at 10 a.m.:
Location: 25.5 degrees north, 117.3 degrees east.


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


Climatological Information for 15 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

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
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Bulletin updated at 09:45 HKT 15/Sep/2016

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

A relatively dry continental airstream is affecting the coast of Guangdong. Meanwhile, the cloud band associated with Tropical Cyclone Meranti is covering eastern Guangdong.

At 10 a.m., Typhoon Meranti was centred about 140 kilometres northwest of Xiamen. It is forecast to move northwest or north-northwest at about 20 kilometres per hour across inland Fujian and further weaken. Meanwhile, Typhoon Malakas was centred about 1010 kilometres south of Okinawa. It is forecast to move northwest or west-northwest at about 24 kilometres per hour in the general direction of the seas east of Taiwan.

Weather forecast for today

Mainly fine. Hot and dry during the day. A few showers later. Moderate northwesterly winds, occasionally fresh on high ground at first.

Outlook : Sunny periods and a few showers in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 15/09/2016; 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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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 15/Sep/2016

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

GENERAL SITUATION AT 142100 UTC:
FOR DETAILS ON TYPHOON MERANTI (1614), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. TYPHOON MALAKAS (1616) 970HPA 17N 129E NW OR WNW 14KT INTSF.

MARINE FORECAST FOR 24 HOURS FROM 150100 UTC:

HONG KONG= NW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SE UP TO 2 M. TEMP 32-27 C. =
KWANGTUNG= NW 5-6, UP TO 10 IN E. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS IN E. SEA 2-3 M, UP TO 10 M IN E. SWELL E TO NE 3 M, UP TO 7 M IN E. =
TAIWAN STRAIT= SW 11-12, BEC S TO SE 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 12-14 M, 6-8 M LATER. SWELL S TO SW 5-7 M. =
BASHI= S 6-7, CYCLONIC UP TO 12 IN E LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 14 M LATER. SWELL E TO NE 5-7 M, S TO SW 5-7 M. =
PRATAS= SW 5-6, UP TO 7 AT FIRST. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M AT FIRST. SWELL E TO NE 5 M, SW 5-7 M. =
BALINTANG= S 6, NW UP TO 12 IN E LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 14 M LATER. SWELL E TO NE 5 M, S TO SW 5-7 M. =
SCARBOROUGH= SW 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 2-3 M. =
PARACEL= NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
TONKIN= NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 09:30 HKT 15/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 15 September 2016

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

    Weather Situation:
    At 9 a.m., Typhoon Meranti with maximum sustained winds of about 130 kilometres per hour near its centre was located at 25.4 degrees north, 117.5 degrees east. It is forecast to move northwest or north-northwest at about 20 kilometres per hour moving, across inland Fujian and weakening further. Meanwhile, Typhoon Malakas with maximum sustained winds of about 120 kilometres per hour near its centre was located at 17.1 degrees north, 128.6 degrees east. It is forecast to move northwest or west-northwest at about 24 kilometres per hour in the general direction of the seas east of Taiwan.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northwest force 4 to 5, occasionally force 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    Southwest force 9 to 10, becoming force 8.
    Frequent heavy squally showers and thunderstorms.
    Very rough to high seas.

    Shanwei:
    Southwest force 6 to 7, occasionally force 8.
    Frequent squally showers and thunderstorms.
    Rough to very rough seas.

    South of Hong Kong and Shangchuan Dao:
    Northwest force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

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

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

    Waglan Island Wind west-northwest force 3
      Visibility 17 Kilometres

    Shantou Wind west force 2
      Visibility 30 Kilometres

    Dongsha Wind west-southwest force 4
      Visibility 8 Kilometres in rain

    Huangmaozhou Wind west-northwest force 4

    Macau Wind northwest force 3
      Visibility 10 Kilometres

    Xisha Wind west-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 15/SEP/2016
    (Next update at 17:30 HKT 15/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS. 
     STRONG WINDS AND SEV TURB NEAR HILLS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 9 A.M., TYPHOON MERANTI WAS CENTERED NEAR
     25.4N 117.5E. IT IS FORECAST TO MOVE NORTHWEST
     OR NORTH-NORTHWEST AT ABOUT 10 KNOTS ACROSS
     INLAND FUJIAN AND WEAKENING FURTHER.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  320/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  320/15-20                            29-33
   B.   2000 FT:  340/15-20, OCNL 25 AT FIRST          24
   C.   5000 FT:  340/15-20                            20
   D.  10000 FT:  340/20                               15
   E.  18000 FT:  320/20                               0
   F.  24000 FT:  340/20                               MS12
   G.  30000 FT:  290/15                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3500-4000 FT.
   I. WEATHER       : 
      MAINLY FINE. A FEW SHOWERS AND ISOLATED
      THUNDERSTORMS LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT SCT 4500 FT. 
      TEMPO FEW CB 1000 FT  SCT 2000 FT  BKN 5000 FT.
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 12800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND NEAR HILLS. 
                      MOD OFFSHORE.
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHWESTERLY WINDS. 
     MAINLY CLOUDY. 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 02:05 HKT on 15 Sep 16

    VHHK SIGMET 3 VALID 141810/142210 VHHH- VHHK HONG KONG FIR EMBD TS FCST E OF E11630 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.

    The latest report on Tropical Cyclone Meranti broadcast by Ms LAM CHING CHI , Senior Scientific Officer of the Hong Kong Observatory at 6:15 p.m. on 14 Sep 2016.
    Listen Listen

    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 09:30 HKT 15/Sep/2016


    Tropical Cyclone Warning

    At 150000 UTC, Typhoon Meranti (1614) with central pressure 965 hectopascals was centred within 60 nautical miles of two five point two degrees north (25.2 N) one one seven point five degrees east (117.5 E) and is forecast to move northwest or north-northwest at about 10 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 70 knots.

    Radius of over 33 knot winds 90 nautical miles.
    Radius of over 47 knot winds 60 nautical miles.
    Radius of over 63 knot winds 30 nautical miles.
    Radius of over 2 metre waves 180 nautical miles.

    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 15/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.6 C
Minimum Air Temperature                     26.9 C
Grass Minimum Temperature                   26.2 C
Relative Humidity                        55 - 90 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2217.3 mm
Against an average of                     2076.9 mm

Other Stations                Min                  Max
King's Park                  26.3 C               32.8 C
Wong Chuk Hang               25.5 C               32.5 C
Ta Kwu Ling                  24.7 C               33.3 C
Lau Fau Shan                 26.0 C               31.6 C
Tai Po                       26.0 C               32.7 C
Sha Tin                      24.9 C               33.4 C
Tuen Mun                     25.8 C               32.5 C
Tseung Kwan O                24.7 C               33.7 C
Sai Kung                     25.6 C               32.7 C
Cheung Chau                  25.7 C               31.9 C
Chek Lap Kok                 27.5 C               32.7 C
Tsing Yi                     25.6 C               32.9 C
Shek Kong                    25.1 C               33.9 C
Tsuen Wan Ho Koon            25.2 C               31.6 C
Tsuen Wan Shing Mun Valley   24.8 C               34.0 C
Hong Kong Park               26.0 C               32.8 C
Shau Kei Wan                 26.1 C               33.3 C
Kowloon City                 26.1 C               33.4 C
Happy Valley                 26.1 C               34.6 C
Wong Tai Sin                 25.9 C               34.1 C
Stanley                      25.8 C               32.9 C
Kwun Tong                    26.7 C               33.4 C
Sham Shui Po                 26.0 C               33.5 C
Kai Tak Runway Park          26.7 C               33.7 C
Yuen Long Park               24.9 C               34.0 C

Duration of sunshine (King's Park):              9.7 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 9.
 

Yesterday's (14 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                         0.12
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 14 Sep
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