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Bulletin issued at 01:02 HKT 18/Oct/2016

At 1 a.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 96 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 25 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 23 degrees;
Tai Po 24 degrees;
Sha Tin 25 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 25 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 25 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 24 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 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 11:45 p.m. and 0:45 a.m., the rainfall recorded in various regions were:

North District 2 to 5 mm;
Yuen Long 2 to 5 mm;
Tuen Mun 2 to 4 mm;
Tai Po 0 to 3 mm;
Wan Chai 2 mm;
Sai Kung 1 to 2 mm;
Tsuen Wan 0 to 2 mm;
Sha Tin 0 to 2 mm;
Yau Tsim Mong 1 to 2 mm;
Southern District 1 to 2 mm;
Islands District 0 to 2 mm;
Central & Western District 1 to 2 mm;
Eastern District 2 mm;
Kwai Tsing 1 to 2 mm;
Kowloon City 1 to 2 mm;
Wong Tai Sin 1 to 2 mm;
Kwun Tong 2 mm;
Sham Shui Po 1 mm.

Here is the information on Severe Typhoon Sarika:
Location: 18.1 degrees north, 111.8 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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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 00:45 HKT 18/Oct/2016

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

Sarika moved across the central part of the South China Sea, and intensified from a typhoon into a severe typhoon yesterday. The outer rainband affected the south China coast gradually. Locally, there were sunny intervals yesterday morning and became cloudy with a few squally showers later. Under the combined effect of Sarika and the northeast monsoon, it will be windy with squally showers over the south China coast. Besides, Haima intensified from a severe typhoon into a super typhoon yesterday. It is expected to move in the general direction of the northern part of Luzon today and tomorrow.

Weather forecast for Hong Kong

Fresh to strong easterly winds, occasionally gale force offshore at first. Cloudy to overcast with rain and squalls. Rain will be heavy at times. 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 today, 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
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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 23:30 HKT 17/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 17 October 2016

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

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

    At 11 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, 112.1 degrees east. It is forecast to move 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 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, 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, up to force 10 in south 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.
    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 5000 Metres

    Shantou Wind east force 1
      Visibility 12 Kilometres in showers

    Dongsha Wind east-northeast force 4
      Visibility 9 Kilometres

    Huangmaozhou Wind east-northeast force 7

    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 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
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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 23:20 HKT on 17 Oct 16

    VHHK SIGMET 10 VALID 171530/171930 VHHH- VHHK HONG KONG FIR EMBD TS FCST SE OF LINE N2054 E11130 - N2318 E11624 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 00:45 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 1 a.m., Severe Typhoon Sarika was estimated to be about 530 kilometres south-southwest of Hong Kong (near 18.1 degrees north 111.8 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
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    Severe Weather Information Centre

    Bulletin issued at 00:31 HKT 18/Oct/2016


    Tropical Cyclone Warning

    At 171500 UTC, Severe Typhoon Sarika (1621) with central pressure 950 hectopascals was centred within 60 nautical miles of one eight point zero degrees north (18.0 N) one one two point zero degrees east (112.0 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 181500 UTC
    One nine point seven degrees north (19.7 N)
    One zero nine point four degrees east (109.4 E)
    Maximum winds 70 knots.

    Forecast position and intensity at 191500 UTC
    Two one point seven degrees north (21.7 N)
    One zero seven point five degrees east (107.5 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 201500 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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