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Bulletin issued at 11:02 HKT 08/Oct/2016

At 11 a.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 69 per cent.
During the past hour the mean UV Index recorded at King's Park was 5. The intensity of UV radiation was moderate.

Please be reminded that:

The Tropical Cyclone Signal No. 1 has been issued.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 28 degrees;
Lau Fau Shan 29 degrees;
Tai Po 28 degrees;
Sha Tin 29 degrees;
Tuen Mun 29 degrees;
Tseung Kwan O 31 degrees;
Sai Kung 29 degrees;
Cheung Chau 29 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 29 degrees;
Shek Kong 28 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 30 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 31 degrees;
Kowloon City 30 degrees;
Happy Valley 31 degrees;
Wong Tai Sin 30 degrees;
Stanley 30 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 29 degrees.

Here is the information on Tropical Storm Aere:
Location: 21.2 degrees north, 116.4 degrees east; Maximum sustained wind near its centre: 85 km/h.


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


Climatological Information for 8 Oct

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 08/Oct/2016

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

Weather forecast for today

Sunny periods. Mainly cloudy with a few showers later. Moderate to fresh northerly winds, occasionally strong on high ground.

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


(The above forecast period is valid up to 23:59 HKT today, 08/10/2016; 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 08/Oct/2016

STORM WARNING AREAS: KWANGTUNG AND PRATAS.
GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 072100 UTC:
FOR DETAILS ON TROPICAL STORM AERE (1619), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 080100 UTC:

HONG KONG= N 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA 2 M. TEMP 30-24 C. =
KWANGTUNG= N TO NE 5-6, 8-9 IN E, UP TO 10 LATER. DOWN TO 500 M IN FRQ SQUALLY SHOWERS AND TS IN E. SEA 2-3 M, UP TO 10 M IN E. SWELL NE 2-3 M. =
TAIWAN STRAIT= E TO NE 6-7, UP TO 8 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. =
BASHI= S TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2 M. =
PRATAS= CYCLONIC 8-9, UP TO 10 LATER. DOWN TO 500 M IN FRQ SQUALLY SHOWERS AND TS. SEA 6-8 M, UP TO 10 M LATER. SWELL NE 3 M. =
BALINTANG= S TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2 M. =
SCARBOROUGH= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PARACEL= N 4-5, 6-7 IN E. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, 3-4 M IN E. SWELL NE 2 M. =
TONKIN= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= N TO NE 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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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 09:30 HKT 08/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 08 October 2016

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

    Weather Situation:
    At 9 a.m., Tropical Storm Aere with maximum sustained winds of about 85 kilometres per hour near its centre was located at 21.1 degrees north, 116.4 degrees east. It is forecast to be slow-moving, lingering over the northern part of the South China Sea..

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 4 to 5, occasionally force 6.
    A few showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    East to northeast force 7 to 8.
    Scattered squally showers and thunderstorms.
    Rough to very rough seas.

    Shanwei:
    Cyclonic force 8 to 9, up to force 10 later.
    Frequent heavy squally showers and thunderstorms.
    Very rough to high seas.

    South of Hong Kong:
    North to northeast force 6 to 7.
    Scattered squally showers and thunderstorms.
    Rough seas.

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

    Outlook for the next 48 hours
    Northeasterly winds of force 7 to 8, cyclonic winds of force 9 to 10 in east. Squally showers and thunderstorms.

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

    Waglan Island Wind north force 5
      Visibility 15 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 10 Kilometres in showers

    Dongsha Wind southwest force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northwest force 5

    Macau Wind north force 3
      Visibility 14 Kilometres

    Xisha Wind calm
      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 09:30 HKT 08/OCT/2016
    (Next update at 17:30 HKT 08/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 9 A.M., TROPICAL STORM AERE WAS CENTRED NEAR
     21.1 DEGREES NORTH 116.4 DEGREES EAST AND IS
     FORECAST TO BE SLOW-MOVING AND LINGER OVER THE
     NORTHERN PART OF THE SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  360/15-20, OCNL 25                   29-32
   B.   2000 FT:  360/20-25, OCNL 30                   24
   C.   5000 FT:  020/25, OCNL 30                      19
   D.  10000 FT:  020/20-25                            10
   E.  18000 FT:  360/10-15                            MS3
   F.  24000 FT:  330/10                               MS13
   G.  30000 FT:  290/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SQUALLY SHOWERS AND
      ISOLATED THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT SCT 3500 FT. TEMPO FEW CB 1000 FT
      SCT 2500 FT BKN 4000 FT
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE AND ON HIGH GROUNDS. MAINLY
     CLOUDY WITH A FEW SQUALLY 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 09:20 HKT on 08 Oct 16

    VHHK SIGMET 1 VALID 080120/080600 VHHH- VHHK HONG KONG FIR TC AERE OBS AT 0000Z N2106 E11624 CB TOP FL480 WI 120NM OF CENTRE MOV N 01KT NC FCST 0600Z TC CENTRE N2106 E11624=

    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 08/Oct/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., Tropical Storm Aere was estimated to be about 260 kilometres east-southeast of Hong Kong (near 21.2 degrees north 116.4 degrees east) and is forecast to be slow-moving and linger over the northern part of the South China Sea.
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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 08/Oct/2016


    Tropical Cyclone Warning

    At 080000 UTC, Tropical Storm Aere (1619) with central pressure 988 hectopascals was centred within 60 nautical miles of two one point one degrees north (21.1 N) one one six point four degrees east (116.4 E) and is forecast to be slow-moving for the next 24 hours.

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

    Radius of over 33 knot winds 45 nautical miles.
    Radius of over 2 metre waves 120 nautical miles over northern semicircle, 90 nautical miles elsewhere.

    Forecast position and intensity at 090000 UTC
    Two one point six degrees north (21.6 N)
    One one six point five degrees east (116.5 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 100000 UTC
    Two one point one degrees north (21.1 N)
    One one five point seven degrees east (115.7 E)
    Maximum winds 45 knots.

    Forecast position and intensity at 110000 UTC
    Two zero point four degrees north (20.4 N)
    One one four point three degrees east (114.3 E)
    Maximum winds 30 knots.

    Forecast position and intensity at 120000 UTC
    Dissipated over sea.



    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 08/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.3 C
Minimum Air Temperature                     25.5 C
Grass Minimum Temperature                   25.1 C
Relative Humidity                        68 - 97 Percent
Rainfall                                    17.3 mm 
Total rainfall since 1st January          2394.2 mm
Against an average of                     2269.3 mm

Other Stations                Min                  Max
King's Park                  25.1 C               29.6 C
Wong Chuk Hang               24.5 C               30.0 C
Ta Kwu Ling                  24.1 C               30.4 C
Lau Fau Shan                 25.3 C               30.8 C
Tai Po                       24.6 C               28.9 C
Sha Tin                      24.9 C               30.4 C
Tuen Mun                     24.8 C               31.1 C
Tseung Kwan O                23.8 C               29.7 C
Sai Kung                     25.7 C               29.6 C
Cheung Chau                  24.8 C               28.9 C
Chek Lap Kok                 26.3 C               31.9 C
Tsing Yi                     24.3 C               30.4 C
Shek Kong                    24.6 C               30.6 C
Tsuen Wan Ho Koon            23.8 C               28.5 C
Tsuen Wan Shing Mun Valley   24.1 C               30.5 C
Hong Kong Park               24.5 C               30.3 C
Shau Kei Wan                 25.1 C               30.8 C
Kowloon City                 24.9 C               30.0 C
Happy Valley                 24.8 C               31.6 C
Wong Tai Sin                 25.2 C               30.5 C
Stanley                      25.4 C               30.9 C
Kwun Tong                    25.1 C               30.2 C
Sham Shui Po                 25.3 C               30.4 C
Kai Tak Runway Park          25.7 C               30.6 C
Yuen Long Park               24.9 C               31.6 C

Duration of sunshine (King's Park):              3.8 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 6.
 

Yesterday's (07 Oct 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                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

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 07 Oct
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