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Bulletin issued at 22:02 HKT 17/Oct/2016

At 10 p.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 93 per cent.

Please be reminded that:

The Tropical Cyclone Signal No. 3 has been issued.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 24 degrees;
Tai Po 25 degrees;
Sha Tin 25 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 26 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 26 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 25 degrees;
Kowloon City 25 degrees;
Happy Valley 26 degrees;
Wong Tai Sin 25 degrees;
Stanley 25 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 25 degrees.

Between 8:45 and 9:45 p.m., the rainfall recorded in various regions were:

Kwai Tsing 0 to 2 mm;
Eastern District 1 to 2 mm;
Tai Po 0 to 2 mm;
Tsuen Wan 0 to 2 mm;
Sha Tin 0 to 2 mm;
Central & Western District 0 to 2 mm;
Sai Kung 0 to 2 mm;
Southern District 0 to 2 mm;
Wan Chai 1 to 2 mm;
Yuen Long 0 to 2 mm;
Wong Tai Sin 1 to 2 mm;
Kwun Tong 0 to 2 mm;
Sham Shui Po 1 to 2 mm;
Kowloon City 1 to 2 mm;
North District 0 to 1 mm;
Islands District 0 to 1 mm;
Yau Tsim Mong 1 mm.

Here is the information on Severe Typhoon Sarika:
Location: 17.9 degrees north, 112.2 degrees east; Maximum sustained wind near its centre: 155 km/h.


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


Climatological Information for 17 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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

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Bulletin updated at 21:45 HKT 17/Oct/2016

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

Weather forecast for tonight and tomorrow

Fresh to strong easterly winds, occasionally gale force offshore at first. Cloudy to overcast with rain and squalls. Rain will be heavy tomorrow. Temperatures will range between 23 and 26 degrees. There will be rough seas and swells.

Outlook : Rain will ease off gradually in the following couple of days. There will be showers and squalls again towards weekend.


(The above forecast period is valid up to 23:59 HKT tomorrow, 18/10/2016; 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 17/Oct/2016

HURRICANE WARNING AREAS: PARACEL AND TONKIN.
STORM WARNING AREAS: KWANGTUNG AND DANANG.
GALE WARNING AREAS: HONG KONG, PRATAS AND SCARBOROUGH.

GENERAL SITUATION AT 170900 UTC:
FOR DETAILS ON SEVERE TYPHOON SARIKA (1621), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 171300 UTC:

HONG KONG= E 6-7, OCNL 8 AT FIRST. RAIN AND SQUALLY TS. SEA 4 M. SWELL E 2 M. TEMP 23-26 C. =
KWANGTUNG= E TO NE 7-8, 10-11 IN W LATER. DOWN TO 500 M IN FRQ SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 12 M IN W LATER. SWELL E TO NE 3-4 M, S TO SE 3-4 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
BASHI= E 5-6, UP TO 7 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL E 2 M. =
PRATAS= E TO SE 6-7, 8-9 AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, 6-8 M AT FIRST. SWELL E 3 M, S TO SE 3-5 M. =
BALINTANG= E 5-6, UP TO 7 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL E 2 M. =
SCARBOROUGH= S TO SE 6-7, UP TO 8 AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL S TO SE 3-4 M. =
PARACEL= CYCLONIC 12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 14 M. SWELL NE 4-6 M, SE 4-6 M. =
TONKIN= N TO NW 7-8, UP TO 12 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS LATER. SEA 4-6 M, UP TO 14 M LATER. SWELL NE 2-3 M LATER. =
DANANG= N TO NW 8-9, 10-11 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, UP TO 12 M LATER. SWELL E TO NE 2-3 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 21:15 HKT 17/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:15 p.m. on 17 October 2016

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

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    At 9 p.m., Severe Typhoon Sarika with maximum sustained winds of about 155 kilometres per hour near its centre was located at 17.9 degrees north, 112.4 degrees east, it is forecast to move west-northwest at about 15 kilometres per hour towards Hainan. Besides, tropical cyclone Heima will intensify gradually in the next couple of days in the general direction of the northern part of Luzon, entering the northern part of the South China Sea on Thursday.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 6 to 7, occasionally force 8 at first.
    Some rain and squally thunderstorms.
    Rough to very rough seas.

    Nan'ao:
    East to northeast force 6 to 7.
    Squally showers and thunderstorms.
    Rough seas.

    Shanwei:
    East to northeast force 6 to 7, up to force 8 in south at first.
    Squally showers and thunderstorms.
    Rough to very rough seas.

    South of Hong Kong:
    East to northeast force 8 to 9.
    Frequent squally showers and thunderstorms.
    Very rough to high seas.

    Shangchuan Dao:
    East to northeast force 9 to 10, up to force 11 in south.
    Frequent squally showers and thunderstorms.
    High to very high seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 6 to 7, up to force 8 to 9 in west at first, north to northeasterly winds of force 8 to 9 in east later. Occasional heavy squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 9
      Visibility 6 Kilometres

    Shantou Wind east force 1
      Visibility 12 Kilometres in showers

    Dongsha Wind east-northeast force 4
      Visibility 9 Kilometres

    Huangmaozhou Wind east-northeast force 6

    Macau Wind north-northeast force 3
      Visibility 3000 Metres in mist

    Xisha Wind west-southwest force 10
      Visibility 600 Metres in showers

  • 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 18:15 HKT 17/OCT/2016
    (Next update at 01:30 HKT 18/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     SEV TURB AND SEV GUSTS.  GALE FORCE WINDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     TYPHOON SARIKA HAS INTENSIFIED INTO A SEVERE
     TYPHOON.
     AT 6 P.M., SARIKA WAS CENTRED NEAR 17.6 DEGREES
     NORTH, 112.6 DEGREES EAST. IT IS FORECAST TO
     MOVE WEST-NORTHWEST AT ABOUT 11 KNOTS  ACROSS
     THE CENTRAL PART OF THE SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1815 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/20-25G35
       OFFSHORE:  080/25-30G40                         26-23
   B.   2000 FT:  080/25-30 OCNL 35G45                 21
   C.   5000 FT:  100/30                               20
   D.  10000 FT:  110/30                               10
   E.  18000 FT:  120/30                               MS4
   F.  24000 FT:  150/30                               MS13
   G.  30000 FT:  160/30                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY TO OVERCAST WITH RAIN AND SQUALLS. RAIN
      WILL BE HEAVY LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 4500 FT
   K. VISIBILITY    : 8 KM.  TEMPO 3000 IN SHOWERS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 4.0-5.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG EASTERLY WINDS, OCCASIONALLY
     GALE ON HIGH GROUND.  CLOUDY TO OVERCAST WITH
     HEAVY RAIN AND SQUALLS.=

    ===================================================================
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 19:20 HKT on 17 Oct 16

    VHHK SIGMET 9 VALID 171130/171530 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF LINE N2048 E11130 - N2312 E11730 TOP FL450 MOV WNW 10KT NC=

    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 21:45 HKT 17/Oct/2016

    Tropical Cyclone Bulletin

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

    The Strong Wind Signal, No. 3 is in force.

    This means that winds with mean speeds of 41 to 62 kilometres per hour are expected.

    At 10 p.m., Severe Typhoon Sarika was estimated to be about 530 kilometres south-southwest of Hong Kong (near 17.9 degrees north 112.2 degrees east) and is forecast to move west-northwest at about 15 kilometres per hour towards Hainan.
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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
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    Severe Weather Information Centre

    Bulletin issued at 21:31 HKT 17/Oct/2016


    Tropical Cyclone Warning

    At 171200 UTC, Severe Typhoon Sarika (1621) with central pressure 950 hectopascals was centred within 30 nautical miles of one seven point nine degrees north (17.9 N) one one two point five degrees east (112.5 E) and is forecast to move west-northwest at about 8 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 85 knots.

    Radius of over 33 knot winds 240 nautical miles over northern semicircle, 180 nautical miles elsewhere.
    Radius of over 47 knot winds 120 nautical miles over northern semicircle, 90 nautical miles elsewhere.
    Radius of over 63 knot winds 60 nautical miles.
    Radius of over 2 metre waves 330 nautical miles over northern semicircle, 270 nautical miles elsewhere.

    Forecast position and intensity at 181200 UTC
    One nine point five degrees north (19.5 N)
    One zero nine point seven degrees east (109.7 E)
    Maximum winds 75 knots.

    Forecast position and intensity at 191200 UTC
    Two one point five degrees north (21.5 N)
    One zero seven point seven degrees east (107.7 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 201200 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 17/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.8 C
Minimum Air Temperature                     25.9 C
Grass Minimum Temperature                   24.8 C
Relative Humidity                        59 - 78 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2395.2 mm
Against an average of                     2304.2 mm

Other Stations                Min                  Max
King's Park                  25.7 C               30.8 C
Wong Chuk Hang               24.7 C               31.4 C
Ta Kwu Ling                  22.4 C               31.5 C
Lau Fau Shan                 24.0 C               30.5 C
Tai Po                       23.9 C               30.1 C
Sha Tin                      25.7 C               31.4 C
Tuen Mun                     25.6 C               31.7 C
Tseung Kwan O                24.4 C               32.2 C
Sai Kung                     25.6 C               30.3 C
Cheung Chau                  24.7 C               30.0 C
Chek Lap Kok                 26.7 C               32.1 C
Tsing Yi                     26.3 C               32.1 C
Shek Kong                    23.4 C               31.9 C
Tsuen Wan Ho Koon            24.3 C               30.2 C
Tsuen Wan Shing Mun Valley   23.5 C               32.0 C
Hong Kong Park               25.1 C               31.9 C
Shau Kei Wan                 25.4 C               31.8 C
Kowloon City                 25.5 C               31.6 C
Happy Valley                 25.0 C               32.8 C
Wong Tai Sin                 25.6 C               32.2 C
Stanley                      26.2 C               32.3 C
Kwun Tong                    26.2 C               31.4 C
Sham Shui Po                 25.8 C               33.1 C
Kai Tak Runway Park          26.8 C               31.6 C
Yuen Long Park               23.8 C               32.2 C

Duration of sunshine (King's Park):              7.8 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 8.
 

Yesterday's (16 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                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.14
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 16 Oct
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