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Bulletin issued at 07:02 HKT 29/Sep/2016

At 7 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 65 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 29 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 06:45 HKT 29/Sep/2016

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

The northeast monsoon is affecting the coastal areas of Guangdong gradually. Meanwhile, showers associated with Tropical Cyclone Megi is affecting Guangdong.

At 5 a.m., Tropical Depression Megi was centred about 310 kilometres south of Nanchang. It is forecast to move northwest at about 12 kilometres per hour across the inland areas of Jiangxi and dissipate gradually.

Weather forecast for today

Mainly cloudy with a few showers. It will become cooler. Temperatures will fall from about 29 degrees during the day to around 24 degrees tonight. Moderate to fresh northwesterly winds, occasionally strong offshore and on high ground at first.

Outlook : Slightly cooler with a few showers in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 29/09/2016; 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 28/Sep/2016

GALE WARNING AREAS: KWANGTUNG AND TAIWAN STRAIT.

GENERAL SITUATION AT 280900 UTC:
FOR DETAILS ON TROPICAL STORM MEGI (1617), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 281300 UTC:

HONG KONG= NW 4-5, UP TO 6 AT FIRST. ISOL SHOWERS. SEA 2 M. TEMP 24-29 C. =
KWANGTUNG= NW 5-6, SW 7-8 IN E AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS IN E. SEA 2-3 M, UP TO 6 M IN E AT FIRST. SWELL SW 2 M. =
TAIWAN STRAIT= S TO SW 6-7, UP TO 8 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL SW 2-3 M. =
BASHI= S TO SW 5-6, OCNL 7 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3 M. SWELL SW 2-3 M. =
PRATAS= W TO SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
BALINTANG= S TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M. =
SCARBOROUGH= SW 4-5. OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M. SWELL SW 2 M. =
PARACEL= SW 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= NW 4-5. ISOL SHOWERS. 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.


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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
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    Bulletin issued at 05:30 HKT 29/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 29 September 2016

    Warnings:
    Strong winds in Hong Kong adjacent waters, Nan'ao and Shanwei.

    Weather Situation:
    At 5 a.m., Tropical Depression Megi with maximum sustained winds of about 45 kilometres per hour near its centre was located at 25.8 degrees north, 115.8 degrees east, it is forecast to move northwest at about 12 kilometres per hour across the inland areas of Jiangxi and dissipate gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northwest force 4 to 5, up to force 6 at first.
    A few showers.
    Moderate to rough seas.

    Nan'ao:
    Southwest force 5 to 6, up to force 7 at first.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Shanwei:
    Southwest force 6 to 7, becoming northwest force 5 to 6 later.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    Northwest force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 5 to 6, southwesterly winds of force 5 to 6 in east at first. Isolated showers and thunderstorms.

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

    Waglan Island Wind northwest force 3
      Visibility 30 Kilometres

    Shantou Wind west-southwest force 3
      Visibility 21 Kilometres

    Dongsha Wind southwest force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind northwest force 5

    Macau Wind north-northwest force 3
      Visibility 18 Kilometres

    Xisha Wind southwest force 4
      Visibility 29 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 29/SEP/2016
    (Next update at 9:00-9:30 HKT 29/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS, SEV TURB AND SEV GUSTS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     TROPICAL STORM MEGI HAS WEAKENED INTO A TROPICAL DEPRESSION.
     AT 11 P.M. LAST NIGHT, MEGI WAS CENTRED NEAR 25.5 DEGREES 
     NORTH 116.3 DEGREES EAST. IT IS FORECAST TO MOVE NORTHWEST 
     AT ABOUT 6 KNOTS ACROSS THE INLAND AREAS OF FUJIAN AND
     WEAKEN GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  320/10-15
       OFFSHORE:  320/15-20, OCNL 25 AT FIRST          30-25
   B.   2000 FT:  320/15-20, OCNL 25 AT FIRST          23-20
   C.   5000 FT:  320/25                               19
   D.  10000 FT:  300/20                               12
   E.  18000 FT:  300/35                               MS1
   F.  24000 FT:  320/30                               MS11
   G.  30000 FT:  340/20                               MS22
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTH TO NORTHWESTERLY WINDS, FRESH OFFSHORE AND ON
     HIGH GROUND.  MAINLY CLOUDY WITH A FEW SHOWERS.=

    ===================================================================
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 05:25 HKT on 29 Sep 16

    VHHK SIGMET 6 VALID 282130/290130 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1836 E11530 - N1748 E11300 - N1900 E11200 - N2000 E11600 - N2200 E11730 - N2100 E11730 TOP FL420 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
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    Bulletin issued at 21:30 HKT 28/Sep/2016


    Tropical Cyclone Warning

    At 281200 UTC, Tropical Storm Megi (1617) with central pressure 994 hectopascals was centred within 60 nautical miles of two five point four degrees north (25.4 N) one one six point three degrees east (116.3 E) and is forecast to weaken and move northwest at about 6 knots for the next 12 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 60 nautical miles.
    Radius of over 2 metre waves 210 nautical miles.

    No further warnings on this Tropical Storm will be issued by the Hong Kong Observatory unless re-intensification takes place.

    Forecast position and intensity at 290000 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 29/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.2 C
Minimum Air Temperature                     28.9 C
Grass Minimum Temperature                   26.0 C
Relative Humidity                        52 - 65 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2263.8 mm
Against an average of                     2216.3 mm

Other Stations                Min                  Max
King's Park                  28.4 C               32.1 C
Wong Chuk Hang               29.2 C               32.3 C
Ta Kwu Ling                  26.3 C               32.8 C
Lau Fau Shan                 28.5 C               31.6 C
Tai Po                       28.7 C               31.5 C
Sha Tin                      28.9 C               32.3 C
Tuen Mun                     29.0 C               31.9 C
Tseung Kwan O                27.1 C               30.6 C
Sai Kung                     29.1 C               33.2 C
Cheung Chau                  27.7 C               30.9 C
Chek Lap Kok                 29.6 C               33.0 C
Tsing Yi                     29.3 C               32.8 C
Shek Kong                    28.1 C               32.0 C
Tsuen Wan Ho Koon            27.5 C               31.3 C
Tsuen Wan Shing Mun Valley   27.9 C               31.6 C
Hong Kong Park               28.6 C               31.8 C
Shau Kei Wan                 29.0 C               32.8 C
Kowloon City                 28.3 C               32.2 C
Happy Valley                 29.3 C               32.5 C
Wong Tai Sin                 28.8 C               32.5 C
Stanley                      29.0 C               31.7 C
Kwun Tong                    28.9 C               32.1 C
Sham Shui Po                 29.1 C               32.5 C
Kai Tak Runway Park          28.4 C               32.8 C
Yuen Long Park               28.7 C               32.5 C

Duration of sunshine (King's Park):              0.3 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
Sea surface temperature (Waglan Island):        28.2 C 

Yesterday's (28 Sep 2016) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.15 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                         0.15
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 28 Sep
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