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Bulletin issued at 07:02 HKT 18/Oct/2016

At 7 a.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 97 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 24 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 24 degrees;
Tai Po 24 degrees;
Sha Tin 24 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 25 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 25 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 25 degrees;
Kowloon City 24 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 24 degrees;
Stanley 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 24 degrees.

Between 5:45 and 6:45 a.m., the rainfall recorded in various regions were:

Wan Chai 16 to 18 mm;
Kowloon City 12 to 16 mm;
Southern District 10 to 16 mm;
Central & Western District 6 to 16 mm;
Sha Tin 8 to 15 mm;
Wong Tai Sin 8 to 15 mm;
Eastern District 9 to 14 mm;
Tai Po 4 to 14 mm;
Kwun Tong 11 to 14 mm;
Yau Tsim Mong 10 to 13 mm;
Sham Shui Po 9 to 13 mm;
Sai Kung 4 to 13 mm;
North District 4 to 12 mm;
Yuen Long 3 to 12 mm;
Islands District 3 to 12 mm;
Kwai Tsing 4 to 10 mm;
Tsuen Wan 0 to 9 mm;
Tuen Mun 2 to 3 mm.

Here is the information on Severe Typhoon Sarika:
Location: 18.6 degrees north, 111.1 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 18 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 06:45 HKT 18/Oct/2016

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

Weather forecast for today

Fresh to strong easterly winds. Cloudy to overcast with rain and squalls. Rain will be heavy at times. The maximum temperature will be about 26 degrees. There will be rough seas and swells.

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


(The above forecast period is valid up to 23:59 HKT today, 18/10/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Information on Tropical Cyclones

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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 05:30 HKT 18/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 18 October 2016

    Warnings:
    Hurricane 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 5 a.m., Severe Typhoon Sarika with maximum sustained winds of about 155 kilometres per hour near its centre was located at 18.4 degrees north, 111.3 degrees east. It is forecast to move northwest or west-northwest at about 15 kilometres per hour towards Hainan. Besides, Tropical Cyclone Haima will continue to intensify and move in the general direction of the northern part of Luzon in the next couple of days, and enter the northern part of the South China Sea in the latter part of this week.

    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. Rain will be heavy at times.
    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, occasionally force 8 in south at first.
    Squally showers and thunderstorms.
    Rough to very rough seas.

    South of Hong Kong:
    East to northeast force 7 to 8, up to force 9 at first.
    Frequent squally showers and thunderstorms.
    Very rough to high seas.

    Shangchuan Dao:
    East to northeast force 9 to 10, up to force 12 in south at first.
    Frequent heavy 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, becoming 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 7
      Visibility 3300 Metres

    Shantou Wind east force 2
      Visibility 3500 Metres

    Dongsha Wind east force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 7

    Macau Wind north-northeast force 4
      Visibility 17 Kilometres

    Xisha Wind southwest force 7
      Visibility 2200 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 01:30 HKT 18/OCT/2016
    (Next update at 9:00-9:30 HKT 18/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM AND ASSOCIATED HAZARDS.  SEV TURB AND
     SEV GUSTS.  GALE FORCE WINDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 1 A.M., SEVERE TYPHOON SARIKA WAS CENTRED
     NEAR 18.1 DEGREES NORTH, 111.8 DEGREES EAST. IT
     IS FORECAST TO MOVE WEST-NORTHWEST AT ABOUT 8
     KNOTS TOWARDS HAINAN.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/20-25G35
       OFFSHORE:  090/25-35G45                         24-28
   B.   2000 FT:  090/30-40G50                         20
   C.   5000 FT:  100/40-50                            19
   D.  10000 FT:  110/40                               9
   E.  18000 FT:  120/50                               MS4
   F.  24000 FT:  150/40                               MS13
   G.  30000 FT:  150/35                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY TO OVERCAST WITH RAIN AND SQUALLS. 
      RAIN WILL BE HEAVY AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT 
      TEMPO FEW CB 1500 FT SCT 3000 FT BKN 8000 FT
   K. VISIBILITY    : 7 KM.  TEMPO 3000M IN SHOWERS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 4.0-5.5 M     SEA TEMPERATURE    : 26 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
    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 07:21 HKT on 18 Oct 16

    VHHK SIGMET 12 VALID 172330/180330 VHHH- VHHK HONG KONG FIR EMBD TS FCST SW OF LINE N2236 E11400 - N1948 E11636 TOP FL450 MOV NW 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 06:45 HKT 18/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 7 a.m., Severe Typhoon Sarika was estimated to be about 520 kilometres southwest of Hong Kong (near 18.6 degrees north 111.1 degrees east) and is forecast to move northwest at about 15 kilometres per hour towards Hainan.

    Sarika continues to track towards Hainan steadily, skirting at a distance of around 500 kilometres or more to the southwest of Hong Kong. After Sarika makes landfall at Hainan around noon today, its direct threat to Hong Kong will then decrease. Under the combined effect of Sarika and the northeast monsoon, strong winds are expected to persist over offshore waters for most of the time today. The Observatory will consider issuing the Strong Monsoon Signal to replace the Strong Wind Signal, No. 3 later today.

    Since seas are rough and there are swells, members of the public are advised to stay away from the shoreline and not to engage in water sports.

    In the past hour, the maximum sustained winds recorded at Waglan Island were 72 kilometres per hour.

    (Precautionary Announcements with No. 3 Signal)

    1. You are advised not to delay in taking all precautions to protect your home or property. Make sure now that all loose objects are secure. Porch furniture, flower pots and other objects likely to be blown away should be taken indoors. Check again and make sure all windows and doors can be securely locked.

    2. Engineers, architects and contractors are again reminded that all scaffoldings, hoardings and temporary buildings should be secured.

    3. Fishing vessels not yet in typhoon shelters should seek shelter without delay. Check again that all deck fittings are firmly fastened. If available, heavy anchors should be prepared and used in addition to regular anchors.

    4. 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
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 06:31 HKT 18/Oct/2016


    Tropical Cyclone Warning

    At 172100 UTC, Severe Typhoon Sarika (1621) with central pressure 950 hectopascals was centred within 60 nautical miles of one eight point five degrees north (18.5 N) one one one point two degrees east (111.2 E) and is forecast to move 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 210 nautical miles over northern semicircle, 180 nautical miles elsewhere.
    Radius of over 47 knot winds 90 nautical miles.
    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 182100 UTC
    Two zero point five degrees north (20.5 N)
    One zero eight point six degrees east (108.6 E)
    Maximum winds 65 knots.

    Forecast position and intensity at 192100 UTC
    Two two point three degrees north (22.3 N)
    One zero seven point three degrees east (107.3 E)
    Maximum winds 30 knots.

    Forecast position and intensity at 202100 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 18/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.8 C
Minimum Air Temperature                     24.1 C
Grass Minimum Temperature                   24.8 C
Relative Humidity                        69 - 96 Percent
Rainfall                                    16.7 mm 
Total rainfall since 1st January          2411.9 mm
Against an average of                     2306.7 mm

Other Stations                Min                  Max
King's Park                  23.7 C               29.2 C
Wong Chuk Hang               23.5 C               29.2 C
Ta Kwu Ling                  23.6 C               31.2 C
Lau Fau Shan                 24.1 C               30.0 C
Tai Po                       24.1 C               28.7 C
Sha Tin                      23.9 C               29.2 C
Tuen Mun                     24.8 C               30.4 C
Tseung Kwan O                23.7 C               29.5 C
Sai Kung                     24.3 C               28.6 C
Cheung Chau                  23.2 C               28.0 C
Chek Lap Kok                 25.2 C               31.4 C
Tsing Yi                     24.2 C               29.9 C
Shek Kong                    24.6 C               30.6 C
Tsuen Wan Ho Koon            23.2 C               28.9 C
Tsuen Wan Shing Mun Valley   23.8 C               30.1 C
Hong Kong Park               23.5 C               29.5 C
Shau Kei Wan                 23.4 C               28.8 C
Kowloon City                 23.3 C               29.7 C
Happy Valley                 24.4 C               30.6 C
Wong Tai Sin                 23.6 C               29.7 C
Stanley                      23.9 C               29.0 C
Kwun Tong                    23.9 C               29.5 C
Sham Shui Po                 23.7 C               30.1 C
Kai Tak Runway Park          24.5 C               29.4 C
Yuen Long Park               24.8 C               30.6 C

Duration of sunshine (King's Park):              2.2 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 6.
 

Yesterday's (17 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 17 Oct
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