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Bulletin issued at 04:02 HKT 10/Oct/2016

At 4 a.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 74 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 23 degrees;
Tai Po 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 24 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 23 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 24 degrees;
Stanley 24 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 24 degrees.

Here is the information on Tropical Storm Aere at 3 a.m.:
Location: 21.6 degrees north, 117.6 degrees east.


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


Climatological Information for 10 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Local Weather Forecast

Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 03:45 HKT 10/Oct/2016

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

The northeast monsoon is affecting southern China.

At 2 a.m., Tropical Storm Aere was centred about 150 kilometres northeast of Dongsha. It is forecast to be slow-moving and linger over the northern part of the South China Sea.

Weather forecast for today

Mainly cloudy with one or two rain patches in the morning and at night. Cooler in the morning with a minimum temperature of around 24 degrees. Sunny intervals during the day with a maximum temperature of about 28 degrees. Moderate to fresh northerly winds, occasionally strong on high ground.

Outlook : Windy with a few rain patches in the following couple of days. Cooler in the morning.


(The above forecast period is valid up to 23:59 HKT today, 10/10/2016; 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 09/Oct/2016

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI AND PRATAS.

GENERAL SITUATION AT 090900 UTC:
FOR DETAILS ON TROPICAL STORM AERE (1619), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 091300 UTC:

HONG KONG= N 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL E UP TO 2 M. TEMP 24-28 C. =
KWANGTUNG= N TO NE 6-7, UP TO 8 IN E. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS IN E. SEA 3-4 M, UP TO 6 M IN E. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 8, OCNL 9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 8 M. SWELL NE 3 M, SW 2 M. =
BASHI= S TO SE 6-7, OCNL 8 IN W. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M IN W. SWELL S TO SW 2 M. =
PRATAS= CYCLONIC 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. 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 TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PARACEL= N TO NE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M. SWELL NE 2 M, UP TO 3 M IN N. =
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. SWELL NE UP TO 2 M LATER. =
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

    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 10/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 10 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:
    The northeast monsoon is affecting the south China coastal waters.

    At 3 a.m., Tropical Storm Aere with maximum sustained winds of about 65 kilometres per hour near its centre was located at 21.6 degrees north, 117.6 degrees east. It is forecast to be slow-moving and linger 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.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    Cyclonic force 7 to 8.
    Frequent heavy squally showers and thunderstorms.
    Rough to very rough seas.

    Shanwei:
    North to northeast force 7 to 8.
    Occasional heavy squally showers and thunderstorms.
    Rough to very rough seas.

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

    Shangchuan Dao:
    North to northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7, cyclonic winds of up to force 8 in east at first. Squally showers and thunderstorms.

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

    Waglan Island Wind north force 4
      Visibility 11 Kilometres

    Shantou Wind east force 1
      Visibility 2400 Metres in mist

    Dongsha Wind north force 4
      Visibility 9 Kilometres

    Huangmaozhou Wind north force 3

    Macau Wind north force 3
      Visibility 8 Kilometres

    Xisha Wind south force 1
      Visibility 28 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 10/OCT/2016
    (Next update at 9:00-9:30 HKT 10/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING SOUTHERN
     CHINA.  AT 11 P.M. LAST NIGHT, TROPICAL STORM
     AERE WAS CENTRED NEAR 21.7 DEGREES NORTH, 117.7
     DEGREES EAST.  IT 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 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  010/10-15
       OFFSHORE:  010/15-20, OCNL 25                   24-29
   B.   2000 FT:  020/15-20, OCNL 25                   20
   C.   5000 FT:  020/15-20, OCNL 25                   16
   D.  10000 FT:  010/10                               10
   E.  18000 FT:  080/10                               MS3
   F.  24000 FT:  240/15                               MS13
   G.  30000 FT:  240/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH ONE OR TWO RAIN PATCHES.
      SUNNY INTERVALS DURING THE DAY
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT SCT 4000 FT
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG ON HIGH GROUND.   SUNNY
     INTERVALS DURING THE DAY.=

    ===================================================================
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 03:45 HKT on 10 Oct 16

    VHHK SIGMET 15 VALID 091845/092245 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N2100 E11730 - N2100 E11618 - N2312 E11554 - N2342 E11730 - N2100 E11730 TOP FL480 STNR NC= VHHK SIGMET 16 VALID 092110/100310 VHHH- VHHK HONG KONG FIR TC AERE FCST AT 2110Z N2124 E11730 CB TOP FL480 WI 120NM OF CENTRE MOV SW 02KT NC FCST 0310Z TC CENTRE N2130 E11718=

    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 Aere broadcast by Dr LEE TSZ CHEUNG , Senior Scientific Officer of the Hong Kong Observatory at 6:18 p.m. on 08 Oct 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
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 03:30 HKT 10/Oct/2016


    Tropical Cyclone Warning

    At 091800 UTC, Tropical Storm Aere (1619) with central pressure 994 hectopascals was centred within 90 nautical miles of two one point six degrees north (21.6 N) one one seven point six degrees east (117.6 E) and is forecast to be slow moving 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 over northern semicircle, 90 nautical miles elsewhere.

    Forecast position and intensity at 101800 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 10/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.8 C
Minimum Air Temperature                     24.9 C
Grass Minimum Temperature                   24.9 C
Relative Humidity                        62 - 73 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2394.2 mm
Against an average of                     2270.3 mm

Other Stations                Min                  Max
King's Park                  24.0 C               28.7 C
Wong Chuk Hang               24.4 C               28.8 C
Ta Kwu Ling                  23.6 C               28.5 C
Lau Fau Shan                 23.5 C               28.2 C
Tai Po                       24.0 C               27.4 C
Sha Tin                      24.3 C               27.9 C
Tuen Mun                     24.3 C               28.3 C
Tseung Kwan O                23.8 C               29.4 C
Sai Kung                     24.0 C               26.7 C
Cheung Chau                  23.5 C               28.9 C
Chek Lap Kok                 25.1 C               29.9 C
Tsing Yi                     24.3 C               29.3 C
Shek Kong                    23.9 C               28.3 C
Tsuen Wan Ho Koon            23.0 C               26.8 C
Tsuen Wan Shing Mun Valley   23.5 C               28.5 C
Hong Kong Park               25.1 C               31.2 C
Shau Kei Wan                 24.1 C               30.1 C
Kowloon City                 23.8 C               29.0 C
Happy Valley                 25.2 C               30.7 C
Wong Tai Sin                 24.2 C               30.1 C
Stanley                      24.8 C               30.0 C
Kwun Tong                    24.0 C               29.8 C
Sham Shui Po                 24.4 C               29.6 C
Kai Tak Runway Park          25.0 C               29.3 C
Yuen Long Park               24.2 C               29.4 C

Duration of sunshine (King's Park):              4.7 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 (09 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                               0.10
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 09 Oct
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