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Bulletin issued at 04:11 HKT 21/Oct/2016

At 4 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 79 per cent.

Please be reminded that:

The Tropical Cyclone Signal No. 3 has been issued.
The Hong Kong Observatory announces that the Tropical Cyclone Warning Signal Number 8 is expected to be issued at or before 6:30 a.m. today (21 Oct 2016).

The air temperatures at other places were:

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

Here is the information on Typhoon Haima:
Location: 20.7 degrees north, 116.3 degrees east; Maximum sustained wind near its centre: 145 km/h.


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


Climatological Information for 21 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

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
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Bulletin updated at 04:10 HKT 21/Oct/2016

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

Weather forecast for today

Strong to gale north to northwesterly winds. Overcast with squalls and heavy rain. Seas will be rough with swells. Winds will become west to southwesterlies later. Temperatures will range between 24 and 27 degrees.

Outlook : Rain will ease off later on Saturday. Weather will improve early next week.


(The above forecast period is valid up to 23:59 HKT today, 21/10/2016; 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 20/Oct/2016

HURRICANE WARNING AREAS: HONG KONG, KWANGTUNG, BASHI, PRATAS AND BALINTANG.
STORM WARNING AREA: SCARBOROUGH.
GALE WARNING AREAS: TAIWAN STRAIT AND PARACEL.

GENERAL SITUATION AT 200900 UTC:
FOR DETAILS ON SEVERE TYPHOON HAIMA (1622), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 201300 UTC:

HONG KONG= N 6-7, BEC W TO SW 11-12. DOWN TO 500 M IN FRQ SQUALLY HEAVY SHOWERS AND TS LATER. SEA 3-4 M, UP TO 14 M LATER. SWELL E 2-3 M, S 2-3 M. TEMP 24-27 C. =
KWANGTUNG= N 7-8, BEC CYCLONIC 12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 14 M LATER. SWELL E TO NE 5-7 M, S 4-6 M. =
TAIWAN STRAIT= NE 7-8, BEC S 8-9. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 8 M LATER. SWELL S 3-4 M. =
BASHI= E TO SE 11-12, BEC S 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 14 M AT FIRST. SWELL S TO SW 3-5 M. =
PRATAS= CYCLONIC 12, BEC S TO SW 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, UP TO 14 M AT FIRST. SWELL E TO NE 4-6 M, S TO SW 4-6 M. =
BALINTANG= E TO SE 11-12, BEC S 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 14 M AT FIRST. SWELL S TO SW 3-5 M. =
SCARBOROUGH= SW 9-10, BEC S 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 10 M AT FIRST. SWELL S TO SW 3-4 M. =
PARACEL= N TO NW 6-7, BEC W TO SW 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 8 M AT FIRST. SWELL E TO NE 3-5 M. =
TONKIN= W TO NW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= N TO NW 4-5. ISOL SHOWERS. 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

    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 21/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 21 October 2016

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

    Weather Situation:
    Severe Typhoon Haima has weakened into a typhoon. At 3 a.m., Haima with maximum sustained winds of about 145 kilometres per hour near its centre was located near 20.5 degrees north, 116.4 degrees east. It is forecast to move northwest at about 25 kilometres per hour towards the vicinity east of the Pearl River Estuary.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northwest force 8 to 9, becoming west to southwest force 11 to 12.
    Frequent squally showers and thunderstorms.
    Very rough seas, becoming phenomenal seas.

    Nan'ao:
    South to southeast force 12, becoming southwest force 7 to 8 later.
    Frequent heavy squally showers and thunderstorms.
    Phenomenal seas, becoming very rough seas later.

    Shanwei:
    Cyclonic force 12, becoming southwest force 8 to 9 later.
    Frequent heavy squally showers and thunderstorms.
    Phenomenal seas, becoming very rough to high seas later.

    South of Hong Kong:
    North to northwest force 9 to 10, becoming west to southwest force 11 to 12.
    Frequent heavy squally showers and thunderstorms.
    High seas, becoming phenomenal seas.

    Shangchuan Dao:
    North to northwest force 5 to 6, becoming west to southwest up to force 9.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas, becoming high seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 5 to 6, force 8 to 9 in east at first. Squally showers and thunderstorms in east at first.

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

    Waglan Island Wind north-northwest force 6
      Visibility 16 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 1400 Metres in mist

    Dongsha Wind southeast force 2
      Visibility 8 Kilometres

    Huangmaozhou Wind northwest force 7

    Macau Wind northwest force 3
      Visibility 16 Kilometres

    Xisha Wind west force 2
      Visibility 21 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 03:00 HKT 21/OCT/2016
    (Next update at 9:00-9:30 HKT 21/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     SEV TURB AND SEV GUSTS.  
     HURRICANE FORCE WINDS. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     SEVERE TYPHOON HAIMA HAS WEAKENED INTO A TYPHOON.
     AT 3 A.M., HAIMAA WAS CENTRED NEAR 20.5 DEGREES
     NORTH, 116.4 DEGREES EAST.  IT IS FORECAST TO
     MOVE NORTHWEST AT ABOUT 14 KNOTS  TOWARDS THE
     VICINITY EAST OF THE PEARL RIVER ESTUARY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0300 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  340/25-30 OCNL 35G45
                  BECMG 260/35-40 OCNL 45G50
                  TEMPO VRB/40G55 IN TS
       OFFSHORE:  340/30-35 OCNL 40G50
                  BECMG 260/55-60 OCNL 65G75           28-24
   B.   2000 FT:  350/35-40G50
                  BECMG 330/50-60 OCNL 65G75           23
   C.   5000 FT:  030/40
                  BECMG 360/50                         20
   D.  10000 FT:  080/45
                  BECMG 030/50                         12
   E.  18000 FT:  080/40
                  BECMG 020/45                         MS2
   F.  24000 FT:  040/35                               MS11
   G.  30000 FT:  080/35                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3700- 4200 FT
   I. WEATHER       : 
      OVERCAST WITH FREQUENT SQUALLS AND HEAVY RAIN.
      A FEW ISOLATED THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3000 FT, TEMPO FEW CB 800 FT
      SCT 1500 FT BKN 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 2000 M IN RAIN. TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : SEV
   N. SEA STATE     : 5.5-12.0 M    SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     STRONG TO GALE WEST TO SOUTHWESTERLY WINDS,
     OCCASIONALLY STRONG TO HURRIANCE FORCE OFFSHORE
     AT FIRST. OVERCAST WITH FREQUENT SQUALLS AND
     HEAVY RAIN.=

    ===================================================================
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 03:35 HKT on 21 Oct 16

    VHHK SIGMET 9 VALID 201935/210000 VHHH- VHHK HONG KONG FIR TC HAIMA OBS AT 1800Z N2030 E11630 CB TOP FL480 WI 240NM OF CENTRE MOV NNW 13KT NC FCST 0000Z TC CENTRE N2148 E11606=

    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 04:10 HKT 21/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 4 a.m., Typhoon Haima was estimated to be about 280 kilometres southeast of Hong Kong (near 20.7 degrees north 116.3 degrees east) and is forecast to move northwest at about 25 kilometres per hour towards the vicinity east of the Pearl River Estuary.

    Although Haima has weakened slightly, it continues to move closer to Hong Kong, still posing substantial threat to the territory. According to the present forecast track, the No. 8 Gale or Storm Signal is expected to be issued at or before 6:30 a.m.

    Local winds are strengthening gradually, and the outer rainbands of Haima also begin to affect Hong Kong. Squalls and heavy rain are expected. Members of the public should stay on high alert, stay away from the shoreline, and not to engage in water sports.

    (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. Storm water drains should be cleared of leaves and rubbish, this applies particularly to dwellers in low-lying areas.

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

    4. For safety reasons, it is suggested that all outdoor activities be cancelled.

    5. People should avoid walking or working in areas exposed to gales and squalls. Drivers using highways and flyovers should be alert to violent gusts.

    6. 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.

    7. 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 03:37 HKT 21/Oct/2016


    Tropical Cyclone Warning

    Severe Typhoon Haima (1622) has weakened into a Typhoon with central pressure 955 hectopascals. At 201800 UTC, it was centred within 30 nautical miles of two zero point five degrees north (20.5 N) one one six point five degrees east (116.5 E) and is forecast to move northwest at about 14 knots for the next 12 hours.

    Maximum winds near the centre are estimated to be 80 knots.

    Radius of over 33 knot winds 150 nautical miles over eastern semicircle, 120 nautical miles elsewhere.
    Radius of over 47 knot winds 90 nautical miles.
    Radius of over 63 knot winds 45 nautical miles.
    Radius of over 2 metre waves 300 nautical miles over eastern semicircle, 240 nautical miles elsewhere.

    Forecast position and intensity at 211800 UTC
    Two five point five degrees north (25.5 N)
    One one four point nine degrees east (114.9 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 221800 UTC
    Two nine point nine degrees north (29.9 N)
    One two one point seven degrees east (121.7 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 231800 UTC
    Dissipated over sea.

    Bulletin issued at 03:30 HKT 21/Oct/2016


    Tropical Cyclone Warning

    Severe Typhoon Haima (1622) has weakened into a Typhoon with central pressure 955 hectopascals. At 201800 UTC, it was centred within 30 nautical miles of two zero point five degrees north (20.5 N) one one six point five degrees east (116.5 E) and is forecast to move northwest at about 14 knots for the next 12 hours.

    Maximum winds near the centre are estimated to be 80 knots.

    Radius of over 33 knot winds 150 nautical miles over eastern semicircle, 120 nautical miles elsewhere.
    Radius of over 47 knot winds 90 nautical miles.
    Radius of over 63 knot winds 45 nautical miles.
    Radius of over 2 metre waves 240 nautical miles over eastern semicircle, 300 nautical miles elsewhere.

    Forecast position and intensity at 211800 UTC
    Two five point five degrees north (25.5 N)
    One one four point nine degrees east (114.9 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 221800 UTC
    Two nine point nine degrees north (29.9 N)
    One two one point seven degrees east (121.7 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 231800 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 21/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.5 C
Minimum Air Temperature                     24.7 C
Grass Minimum Temperature                   23.9 C
Relative Humidity                        72 - 97 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2814.0 mm
Against an average of                     2315.6 mm

Other Stations                Min                  Max
King's Park                  24.2 C               30.3 C
Wong Chuk Hang               23.5 C               30.0 C
Ta Kwu Ling                  22.9 C               31.0 C
Lau Fau Shan                 23.7 C               29.4 C
Tai Po                       23.6 C               30.3 C
Sha Tin                      23.9 C               31.2 C
Tuen Mun                     23.8 C               30.6 C
Tseung Kwan O                23.6 C               31.0 C
Sai Kung                     24.1 C               29.6 C
Cheung Chau                  24.3 C               30.9 C
Chek Lap Kok                 25.6 C               31.1 C
Tsing Yi                     23.8 C               30.1 C
Shek Kong                    23.1 C               31.5 C
Tsuen Wan Ho Koon            22.8 C               29.0 C
Tsuen Wan Shing Mun Valley   23.2 C               32.3 C
Hong Kong Park               24.1 C               30.1 C
Shau Kei Wan                 24.3 C               31.4 C
Kowloon City                 24.2 C               32.1 C
Happy Valley                 24.0 C               32.2 C
Wong Tai Sin                 23.9 C               32.2 C
Stanley                      24.5 C               29.8 C
Kwun Tong                    24.8 C               32.5 C
Sham Shui Po                 24.7 C               31.6 C
Kai Tak Runway Park          25.1 C               31.6 C
Yuen Long Park               23.2 C               31.3 C

Duration of sunshine (King's Park):              7.4 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 6.
 

Yesterday's (20 Oct 2016) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.14 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                        0.14

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 20 Oct
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