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Bulletin issued at 21:02 HKT 06/Oct/2016

At 9 p.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 81 per cent.

Please be reminded that:

The Tropical Cyclone Signal No. 1 has been issued.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 28 degrees;
Tai Po 27 degrees;
Sha Tin 27 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 27 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 28 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 27 degrees;
Happy Valley 26 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 27 degrees.

Between 7:45 and 8:45 p.m., the rainfall recorded in various regions were:

Eastern District 1 to 6 mm;
Wan Chai 2 to 5 mm;
Southern District 0 to 4 mm;
Islands District 0 to 3 mm;
Sai Kung 0 to 3 mm;
Central & Western District 0 to 2 mm;
Kwun Tong 0 to 2 mm.

Here is the information on Tropical Storm Aere:
Location: 20.6 degrees north, 117.8 degrees east; Maximum sustained wind near its centre: 65 km/h.


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


Climatological Information for 6 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 20:45 HKT 06/Oct/2016

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

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers. Sunny intervals during the day tomorrow. Temperatures will range between 26 and 30 degrees. Moderate north to northeasterly winds, becoming fresh later tomorrow.

Outlook : Windier with a few rain patches over the weekend and Chung Yeung Festival holiday.


(The above forecast period is valid up to 23:59 HKT tomorrow, 07/10/2016; 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 06/Oct/2016

GALE WARNING AREAS: KWANGTUNG, BASHI, PRATAS AND BALINTANG.

GENERAL SITUATION AT 060900 UTC:
FOR DETAILS ON TROPICAL STORM AERE (1619), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 061300 UTC:

HONG KONG= NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA 2-3 M. TEMP 26-30 C. =
KWANGTUNG= NE 5-6, 7-8 IN E LATER. DOWN TO 1000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA 2-3 M, 6 M IN E LATER. =
TAIWAN STRAIT= E TO SE 6-7. DOWN TO 2000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL S 2 M. =
BASHI= CYCLONIC 7-8, BEC SE 6-7. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA UP TO 8 M. SWELL W 2-3 M. =
PRATAS= NE 6-7, BEC CYCLONIC 8-9. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA UP TO 8 M. SWELL NE 2-3 M. =
BALINTANG= S TO SE 7-8, 6 LATER. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 3-6 M. SWELL W 2-3 M. =
SCARBOROUGH= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PARACEL= N TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TONKIN= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY 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 19:30 HKT 06/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 06 October 2016

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

    Weather Situation:
    Tropical Depression Aere has intensified into a tropical storm. At 7 p.m., Aere with maximum sustained winds of about 65 kilometres per hour near its centre was located at 20.6 degrees north, 118.0 degrees east. It is forecast to move west at about 14 kilometres per hour across the northern part of the South China Sea.

    Area forecasts for the next 24 hours

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

    Nan'ao:
    North to northeast force 6 to 7, force 8 to 9 later.
    Isolated heavy squally showers and thunderstorms.
    Rough seas, becoming very rough later.

    Shanwei:
    Northeast force 5 to 6, force 7 to 8 later.
    Isolated heavy squally showers and thunderstorms.
    Moderate to rough seas, becoming rough to very rough later.

    South of Hong Kong:
    Northeast force 5 to 6, force 6 to 7 later.
    Isolated 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 8 to 9. Scattered heavy squally showers and thunderstorms.

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

    Waglan Island Wind north force 4
      Visibility 24 Kilometres

    Shantou Wind west-northwest force 1
      Visibility 18 Kilometres in showers

    Dongsha Wind north-northeast force 4
      Visibility 8 Kilometres

    Huangmaozhou Wind northwest force 3

    Macau Wind north force 2
      Visibility 10 Kilometres

    Xisha Wind east-northeast 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 19:30 HKT 06/OCT/2016
    (Next update at 01:30 HKT 07/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING SOUTHERN
     CHINA. TROPICAL DEPRESSION AERE HAS INTENSIFIED
     INTO A TROPICAL STORM. AT 7 P.M., AERE WAS
     CENTRED NEAR 20.6 DEGREES NORTH, 118.0 DEGREES
     EAST, IT IS FORECAST TO MOVE WEST AT ABOUT 8
     KNOTS ACROSS THE NORTHERN PART OF THE SOUTH
     CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1930 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  030/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  030/15-20                            30-26
   B.   2000 FT:  050/15-20                            23
   C.   5000 FT:  060/20                               18
   D.  10000 FT:  060/20                               10
   E.  18000 FT:  050/10                               MS2
   F.  24000 FT:  040/10                               MS13
   G.  30000 FT:  030/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. ISOLATED
      THUNDERSTORMS AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT. TEMPO FEW CB 1000 FT SCT 2500 FT.
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. 
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTH TO NORTHEASTERLY WINDS. 
     SUNNY INTERVALS AND 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
    Traditional Chinese Simplified Chinese

    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 19:35 HKT on 06 Oct 16

    VHHK SIGMET 6 VALID 061140/061540 VHHH- VHHK HONG KONG FIR EMBD TS FCST E OF E116 TOP FL400 MOV W 05KT NC= VHHK SIGMET 5 VALID 061900/070100 VHHH- VHHK HONG KONG FIR TC AERE FCST AT 1900Z N2042 E11712 CB TOP FL450 WI 120NM OF CENTRE MOV W 06KT INTSF FCST 0100Z TC CENTRE N2042 E11654=

    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 20:45 HKT 06/Oct/2016

    Tropical Cyclone Bulletin

    Here is the latest Tropical Cyclone Bulletin issued by the Hong Kong Observatory.

    The Standby Signal, No. 1 was issued at 8:40 p.m.

    This means that a tropical cyclone now centred within about 800 kilometres of Hong Kong may affect us.

    At 9 p.m., Tropical Storm Aere was estimated to be about 420 kilometres east-southeast of Hong Kong (near 20.6 degrees north 117.8 degrees east) and is forecast to move west at about 14 kilometres per hour across the northern part of the South China Sea and intensify gradually.

    Even though Aere continues to edge closer to the south China coastal areas, its circulation is relatively small. It will only bring significant impact to local weather when it gets relatively close to Hong Kong.

    Aere is expected to slow down while the northeast monsoon will persist over southern China. There is still rather large uncertainty in Aere's movement and intensity change in the next few days.

    According to the present forecast track, Aere will maintain at a distance from Hong Kong during the day tomorrow. The chance of issuing the Strong Wind Signal, No. 3 tomorrow morning is not high.

    (Precautionary Announcements with No. 1 Signal)

    1. Some precautions against damage should be taken now, gutters and drains should be cleared of obstructions. Hinges, bolts, locks and shutters of windows and doors should be checked.

    2. Those who have definite duties during a tropical cyclone should now remain on call or contact their control centres from time to time.

    3. If you are planning to visit Guangdong, Macau, any of the off-shore islands or remote parts of Hong Kong, you are reminded that changes in weather may affect your plans.

    4. Since there may be swells, you are advised to stay away from the shoreline and not to engage in water sports.

    5. All small vessels including low power vessels and fishing vessels in open sea should seek shelter as soon as possible. Please take any precautions necessary for small vessels and secure them properly with moorings.

    6. Listen to radio, watch TV or browse the Hong Kong Observatory's web site for information on the tropical cyclone.
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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 21:30 HKT 06/Oct/2016


    Tropical Cyclone Warning

    At 061200 UTC, Tropical Storm Aere (1619) with central pressure 994 hectopascals was centred within 90 nautical miles of two zero point six degrees north (20.6 N) one one seven point nine degrees east (117.9 E) and is forecast to move west at about 8 knots for the next 24 hours.

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

    Radius of over 33 knot winds 30 nautical miles.
    Radius of over 2 metre waves 120 nautical miles.

    Forecast position and intensity at 071200 UTC
    Two zero point nine degrees north (20.9 N)
    One one six point four degrees east (116.4 E)
    Maximum winds 45 knots.

    Forecast position and intensity at 081200 UTC
    Two one point zero degrees north (21.0 N)
    One one five point eight degrees east (115.8 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 091200 UTC
    Two zero point six degrees north (20.6 N)
    One one five point four degrees east (115.4 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 101200 UTC
    Two zero point zero degrees north (20.0 N)
    One one three point seven degrees east (113.7 E)
    Maximum winds 45 knots.

    Forecast position and intensity at 111200 UTC
    One nine point three degrees north (19.3 N)
    One one zero point five degrees east (110.5 E)
    Maximum winds 35 knots.



    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 06/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.9 C
Minimum Air Temperature                     26.9 C
Grass Minimum Temperature                   26.1 C
Relative Humidity                        66 - 87 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2360.2 mm
Against an average of                     2262.0 mm

Other Stations                Min                  Max
King's Park                  26.3 C               32.5 C
Wong Chuk Hang               25.4 C               31.3 C
Ta Kwu Ling                  25.4 C               32.4 C
Lau Fau Shan                 24.7 C               31.7 C
Tai Po                       25.8 C               30.4 C
Sha Tin                      25.4 C               31.1 C
Tuen Mun                     25.8 C               31.3 C
Tseung Kwan O                25.2 C               31.7 C
Sai Kung                     26.3 C               30.2 C
Cheung Chau                  25.8 C               29.9 C
Chek Lap Kok                 27.4 C               31.9 C
Tsing Yi                     26.1 C               32.1 C
Shek Kong                    25.2 C               32.5 C
Tsuen Wan Ho Koon            24.3 C               30.5 C
Tsuen Wan Shing Mun Valley   25.0 C               31.5 C
Hong Kong Park               26.1 C               31.1 C
Shau Kei Wan                 26.0 C               31.5 C
Kowloon City                 26.2 C               31.8 C
Happy Valley                 26.2 C               32.3 C
Wong Tai Sin                 26.4 C               32.6 C
Stanley                      26.4 C               30.8 C
Kwun Tong                    26.6 C               31.6 C
Sham Shui Po                 26.7 C               32.1 C
Kai Tak Runway Park          27.2 C               31.5 C
Yuen Long Park               25.0 C               31.9 C

Duration of sunshine (King's Park):              5.7 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 9.
 

Yesterday's (05 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 05 Oct
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