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Bulletin issued at 03:02 HKT 16/Sep/2016

At 3 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 69 per cent.

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 28 degrees;
Wong Chuk Hang 28 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 27 degrees;
Tai Po 26 degrees;
Sha Tin 28 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 28 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 29 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 28 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 28 degrees;
Stanley 28 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 27 degrees.


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


Climatological Information for 16 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 03:20 HKT 16/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. Tropical Depression Meranti has weakened into an area of low pressure over Jiangxi.

At 3 a.m., Severe Typhoon Malakas was centred about 800 kilometres south-southwest of Okinawa. It is forecast to move northwest at about 24 kilometres per hour in the general direction of the seas east of Taiwan.

Weather forecast for today

Cloudy periods and isolated showers at first. Hot and dry with sunny periods during the day. Temperatures will range between 27 and 32 degrees. Light to moderate north to northwesterly winds.

Outlook : Mainly fine in the following couple of days. It will be dry early next week.


(The above forecast period is valid up to 23:59 HKT today, 16/09/2016; 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 15/Sep/2016

HURRICANE WARNING AREAS: BASHI AND BALINTANG.

GENERAL SITUATION AT 150900 UTC:
TYPHOON MALAKAS (1616) 950HPA 18N 127E NW OR WNW 14KT INTSF. TROPICAL STORM MERANTI (1614) 994HPA 26N 117E N 12KT WKN.

MARINE FORECAST FOR 24 HOURS FROM 151300 UTC:

HONG KONG= N TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. TEMP 27-32 C. =
KWANGTUNG= NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2-3 M. =
TAIWAN STRAIT= SW 4-5, UP TO 6 AT FIRST. ISOL SHOWERS AND SQUALLY TS. SEA 2 M, UP TO 3 M AT FIRST. SWELL S TO SW 2-3 M, UP TO 5 M AT FIRST. =
BASHI= NE 6-7, BEC CYCLONIC 12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 14 M LATER. SWELL E TO SE 3-5 M, SW 2-3 M. =
PRATAS= W TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2-3 M. =
BALINTANG= NE 6-7, BEC W TO NW 12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 14 M LATER. SWELL E TO SE 3-5 M, SW 2-3 M. =
SCARBOROUGH= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2-3 M. =
PARACEL= W TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
TONKIN= N TO 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
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    • 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 03:30 HKT 16/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 16 September 2016

    Warnings:
    Strong winds in Nan'ao.

    Weather Situation:
    At 3 a.m., Severe Typhoon Malakas with maximum sustained winds of about 155 kilometres per hour near its centre was located at 19.3 degrees north, 125.5 degrees east. It is forecast to move northwest at about 24 kilometres per hour in the general direction of the seas east of Taiwan. Besides, Tropical Depression Meranti has weakened into an area of low pressure over Jiangxi.

    Area forecasts for the next 24 hours

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

    Nan'ao:
    Southwest force 4 to 5, occasionally force 6 at first.
    Showers and squally thunderstorms.
    Moderate to rough seas.

    Shanwei:
    West to northwest force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    Northwest force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate 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 north-northeast force 4
      Visibility 47 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 12 Kilometres

    Dongsha Wind south-southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 3

    Macau Wind north-northeast force 3
      Visibility 27 Kilometres

    Xisha Wind west 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 01:30 HKT 16/SEP/2016
    (Next update at 9:00-9:30 HKT 16/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.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/5-10
       OFFSHORE:  030/15                               28-33
   B.   2000 FT:  020/15                               25
   C.   5000 FT:  350/20                               20
   D.  10000 FT:  350/15                               12
   E.  18000 FT:  310/20                               MS3
   F.  24000 FT:  290/10                               MS14
   G.  30000 FT:  250/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY PERIODS WITH ISOLATED SHOWERS AT FIRST.
      SUNNY PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10900, 12100 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTH TO NORTHWESTERLY WINDS.
     SUNNY PERIODS.  MAINLY CLOUDY WITH ISOLATED
     SHOWERS LATER.=

    ===================================================================
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 15:40 HKT 15/Sep/2016


    Tropical Cyclone Warning

    Severe Tropical Storm Meranti (1614) has weakened into a Tropical Storm with central pressure 988 hectopascals. At 150600 UTC, it was centred within 60 nautical miles of two six point five degrees north (26.5 N) one one six point nine degrees east (116.9 E) and is forecast to weaken and move north at about 10 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 45 knots.

    Radius of over 33 knot winds 60 nautical miles over eastern semicircle, 30 nautical miles elsewhere.
    Radius of over 2 metre waves 180 nautical miles.

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

    Forecast position and intensity at 160600 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 16/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.9 C
Minimum Air Temperature                     28.0 C
Grass Minimum Temperature                   26.2 C
Relative Humidity                        62 - 74 Percent
Rainfall                                     0.7 mm 
Total rainfall since 1st January          2218.0 mm
Against an average of                     2095.8 mm

Other Stations                Min                  Max
King's Park                  27.5 C               31.9 C
Wong Chuk Hang               27.3 C               32.7 C
Ta Kwu Ling                  24.2 C               33.2 C
Lau Fau Shan                 27.3 C               31.9 C
Tai Po                       27.1 C               31.7 C
Sha Tin                      27.1 C               33.2 C
Tuen Mun                     26.6 C               33.3 C
Tseung Kwan O                25.4 C               32.6 C
Sai Kung                     27.9 C               32.0 C
Cheung Chau                  26.7 C               32.9 C
Chek Lap Kok                 28.8 C               33.7 C
Tsing Yi                     27.4 C               32.2 C
Shek Kong                    25.2 C               33.6 C
Tsuen Wan Ho Koon            25.6 C               31.8 C
Tsuen Wan Shing Mun Valley   25.7 C               32.2 C
Hong Kong Park               26.7 C               32.3 C
Shau Kei Wan                 27.4 C               32.8 C
Kowloon City                 27.5 C               33.0 C
Happy Valley                 28.4 C               33.4 C
Wong Tai Sin                 27.3 C               33.9 C
Stanley                      27.2 C               31.2 C
Kwun Tong                    27.3 C               32.9 C
Sham Shui Po                 27.8 C               32.9 C
Kai Tak Runway Park          27.7 C               32.7 C
Yuen Long Park               26.4 C               33.7 C

Duration of sunshine (King's Park):              4.5 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
 

Yesterday's (15 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 15 Sep
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