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Bulletin issued at 09:02 HKT 17/Sep/2016

At 9 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 2. The intensity of UV radiation was low.

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

Between midnight and 9 a.m. the minimum temperature was 27.3 degrees Celsius at the Hong Kong Observatory.

Here is the information on Severe Typhoon Malakas at 9 a.m.:
Location: 24.2 degrees north, 122.9 degrees east.


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


Climatological Information for 17 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 08:45 HKT 17/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.

At 8 a.m., Severe Typhoon Malakas was centred about 190 kilometres southeast of Taibei. It is forecast to move north-northwest at about 15 kilometres per hour across the seas east of Taiwan.

Weather forecast for today

Mainly fine. Hot and dry during the day with a maximum temperature of about 32 degrees. Light to moderate northerly winds.

Outlook : Mainly fine and dry in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 17/09/2016; 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 17/Sep/2016

GALE WARNING AREAS: TAIWAN STRAIT AND BASHI.

GENERAL SITUATION AT 160900 UTC:
FOR DETAILS ON SEVERE TYPHOON MALAKAS (1616), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 170100 UTC:

HONG KONG= N 4-5. FINE. SEA UP TO 2 M. TEMP 32-27 C. =
KWANGTUNG= N 4-5. ISOL SHOWERS AND TS IN E. SEA UP TO 2 M. SWELL S TO SW 2-3 M, NE UP TO 3 M IN E LATER. =
TAIWAN STRAIT= NE 6-7, OCNL 8 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2-3 M. =
BASHI= W TO SW 6-7, 8 AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, 6 M AT FIRST. SWELL SW 3-5 M. =
PRATAS= N TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL NE UP TO 3 M. =
BALINTANG= W TO SW 5-6. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M. =
SCARBOROUGH= S TO SW 4-5. DOWN TO 2000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2-3 M, NE 3 M LATER. =
PARACEL= N TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= N TO NW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= 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 09:30 HKT 17/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 17 September 2016

    Weather Situation:
    At 9 a.m., Severe Typhoon Malakas with maximum sustained winds of about 175 kilometres per hour near its centre was located at 24.2 degrees north, 122.9 degrees east. It is forecast to move north-northwest at about 15 kilometres per hour across the seas east of Taiwan.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 4 to 5.
    Moderate seas.

    Nan'ao:
    North force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    North force 4 to 5.
    Moderate seas.

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

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

    Waglan Island Wind north-northeast force 4
      Visibility 28 Kilometres

    Shantou Wind southeast force 1
      Visibility 30 Kilometres

    Dongsha Wind west-southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind north force 4

    Macau Wind north force 2
      Visibility 10 Kilometres

    Xisha Wind west-southwest force 2
      Visibility 16 Kilometres in showers

  • Explanation of Seas or Sea Waves
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  • 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 17/SEP/2016
    (Next update at 17:30 HKT 17/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A RELATIVELY DRY CONTINENTAL AIRSTREAM IS
     AFFECTING THE COAST OF GUANGDONG.
     AT 9 A.M., SEVERE TYPHOON MALAKAS WAS CENTRED
     NEAR 24.2 DEGREES NORTH, 122.9 DEGREES EAST.  IT
     IS FORECAST TO MOVE NORTH-NORTHWEST AT ABOUT 8
     KNOTS ACROSS THE SEAS EAST OF TAIWAN.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  010/5-10
       OFFSHORE:  020/10-15                            29-34
   B.   2000 FT:  020/10-15                            24
   C.   5000 FT:  020/15                               20
   D.  10000 FT:  330/10                               13
   E.  18000 FT:  310/15                               2
   F.  24000 FT:  360/15                               MS11
   G.  30000 FT:  300/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 19000 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTHERLY WINDS.  MAINLY FINE.=

    ===================================================================
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 14:55 HKT on 15 Sep 16

    VHHK SIGMET 2 VALID 150655/151000 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2300 E11700 - N2312 E11730 - N2100 E11730 - N2000 E11642 - N2000 E11530 - N2300 E11700 TOP FL400 STNR WKN=

    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
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    Severe Weather Information Centre

    Bulletin issued at 09:30 HKT 17/Sep/2016


    Tropical Cyclone Warning

    At 170000 UTC, Severe Typhoon Malakas (1616) with central pressure 935 hectopascals was centred within 30 nautical miles of two four point one degrees north (24.1 N) one two three point zero degrees east (123.0 E) and is forecast to move north at about 8 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 95 knots.

    Radius of over 33 knot winds 150 nautical miles.
    Radius of over 47 knot winds 90 nautical miles.
    Radius of over 63 knot winds 45 nautical miles.
    Radius of over 2 metre waves 180 nautical miles.

    Forecast position and intensity at 180000 UTC
    Two seven point four degrees north (27.4 N)
    One two three point zero degrees east (123.0 E)
    Maximum winds 90 knots.

    Forecast position and intensity at 190000 UTC
    Two nine point four degrees north (29.4 N)
    One two five point four degrees east (125.4 E)
    Maximum winds 80 knots.

    Forecast position and intensity at 200000 UTC
    Three one point seven degrees north (31.7 N)
    One two nine point seven degrees east (129.7 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 210000 UTC
    Become extratropical low.



    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 17/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.3 C
Minimum Air Temperature                     27.3 C
Grass Minimum Temperature                   26.0 C
Relative Humidity                        62 - 81 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2218.0 mm
Against an average of                     2118.7 mm

Other Stations                Min                  Max
King's Park                  26.8 C               31.5 C
Wong Chuk Hang               26.6 C               32.4 C
Ta Kwu Ling                  24.0 C               32.4 C
Lau Fau Shan                 25.9 C               32.4 C
Tai Po                       25.8 C               30.5 C
Sha Tin                      26.3 C               32.1 C
Tuen Mun                     26.0 C               32.9 C
Tseung Kwan O                24.2 C               33.2 C
Sai Kung                     27.2 C               31.2 C
Cheung Chau                  25.7 C               30.6 C
Chek Lap Kok                 27.8 C               33.4 C
Tsing Yi                     26.4 C               31.9 C
Shek Kong                    25.8 C               32.9 C
Tsuen Wan Ho Koon            25.0 C               30.6 C
Tsuen Wan Shing Mun Valley   24.5 C               32.1 C
Hong Kong Park               26.7 C               32.4 C
Shau Kei Wan                 26.5 C               32.8 C
Kowloon City                 26.8 C               32.0 C
Happy Valley                 27.4 C               33.5 C
Wong Tai Sin                 26.9 C               33.4 C
Stanley                      26.3 C               31.8 C
Kwun Tong                    26.6 C               31.6 C
Sham Shui Po                 26.3 C               33.0 C
Kai Tak Runway Park          27.6 C               31.9 C
Yuen Long Park               26.4 C               33.2 C

Duration of sunshine (King's Park):              7.3 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 10.
 

Yesterday's (16 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 16 Sep
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