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Bulletin issued at 00:02 HKT 21/Oct/2016

At midnight at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 75 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 28 degrees;
Wong Chuk Hang 28 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 27 degrees;
Tai Po 27 degrees;
Sha Tin 28 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 29 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 29 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 28 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 28 degrees;
Stanley 29 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 27 degrees.

Here is the information on Severe Typhoon Haima:
Location: 20.1 degrees north, 116.7 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 21 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 00:00 HKT 21/Oct/2016

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

Tropical Cyclone Haima crossed the northern part of Luzon yesterday morning and weakened from a super typhoon into a severe typhoon. Under the influence of the outer subsiding air of Haima, there were sunny periods and haze over the territory yesterday. Haima is expected to make landfall over the coast of eastern Guangdong today. There will be frequent heavy rain with squalls over the region. Seas will be rough with swells.

Weather forecast for Hong Kong (Friday, 21 Oct 2016)

Fresh to strong north to northwesterly winds, gales offshore. Overcast with frequent squalls and heavy rain. Seas will be rough with swells. Winds will become west to southwesterlies later. Temperatures will range between 24 and 28 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

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    Bulletin issued at 00:30 HKT 21/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 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:
    At midnight, Severe Typhoon Haima with maximum sustained winds of about 155 kilometres per hour near its centre was located near 20.1 degrees north, 116.7 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 force 7 to 8, becoming west to southwest force 11 to 12.
    Frequent squally showers and thunderstorms.
    Rough to very rough seas, becoming phenomenal.

    Nan'ao:
    Becoming south to southeast force 12, east force 9 to 10 at first.
    Frequent heavy squally showers and thunderstorms.
    Phenomenal seas, high seas at first.

    Shanwei:
    Cyclonic force 12, east force 9 to 10 at first.
    Frequent heavy squally showers and thunderstorms.
    Phenomenal seas, high seas at first.

    South of Hong Kong:
    North to northwest force 7 to 8, becoming west to southwest force 11 to 12.
    Frequent heavy squally showers and thunderstorms.
    Rough to very rough seas, becoming phenomenal.

    Shangchuan Dao:
    North to northwest force 5 to 6, becoming west to southwest up to force 8 to 9.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas, becoming very rough to high seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 5 to 6, up to force 10 in east at first. Squally showers and thunderstorms in east at first.

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

    Waglan Island Wind north force 5
      Visibility 30 Kilometres

    Shantou Wind east force 2
      Visibility 28 Kilometres

    Dongsha Wind northeast force 8
      Visibility 6 Kilometres in rain

    Huangmaozhou Wind northwest force 6

    Macau Wind north-northwest force 3
      Visibility 11 Kilometres

    Xisha Wind northwest force 1
      Visibility 9 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 17:30 HKT 20/OCT/2016
    (Next update at 01:30 HKT 21/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     SEV TURB AND SEV GUSTS.  GALE FORCE WINDS. ISOL
     CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 5 P.M., SEVERE TYPHOON HAIMA WAS CENTRED NEAR
     19.3 DEGREES NORTH, 118.2 DEGREES EAST.  IT IS
     FORECAST TO MOVE NORTHWEST AT ABOUT 14 KNOTS
     ACROSS THE NORTHERN PART OF SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  340/10-15
                  BECMG 360/25-30
                  TEMPO VRB/25G35 IN TS
       OFFSHORE:  340/20-25
                  BECMG 360/30-40G50                   29-24
   B.   2000 FT:  340/20-25
                  BECMG 360/30-40G50                   19
   C.   5000 FT:  360/20-25
                  050/50 LATER                         18
   D.  10000 FT:  080/30
                  060/50 LATER                         13
   E.  18000 FT:  080/30-35
                  050/50 LATER                         MS2
   F.  24000 FT:  070/25
                  050/50 LATER                         MS13
   G.  30000 FT:  080/25
                  050/40 LATER                         MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY. OVERCAST WITH FREQUENT SQUALLY
      HEAVY RAIN AND A FEW ISOLATED THUNDERSTORMS
      LATER.
   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) : 11600 FT
   M. TURBULENCE    : SEV.
   N. SEA STATE     : 3.0-5.0 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     STRONG TO GALE FORCE NORTHWESTERLY WINDS.
     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 00:00 HKT on 21 Oct 16

    VHHK SIGMET 5 VALID 201315/201715 VHHH- VHHK HONG KONG FIR EMBD TS FCST E OF E112 TOP FL480 MOV NW 14KT NC= VHHK SIGMET 6 VALID 201600/202200 VHHH- VHHK HONG KONG FIR TC HAIMA OBS AT 1600Z N2006 E11642 CB TOP FL480 WI 240NM OF CENTRE MOV NW 14KT NC FCST 2200Z TC CENTRE N2106 E11600=

    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 23:45 HKT 20/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 midnight, Severe Typhoon Haima was estimated to be about 360 kilometres southeast of Hong Kong (near 20.1 degrees north 116.7 degrees east) and is forecast to move northwest at about 25 kilometres per hour towards the vicinity east of the Pearl River Estuary.

    Haima is rather intact and is moving closer to Hong Kong steadily, posing substantial threat to the territory. According the present forecast track, the Observatory will consider issuing No. 8 Gale or Storm Signal in the morning on Friday.

    At present, local winds are mainly from the north. Owing to terrain effect, winds have not been strengthened significantly. However, winds are expected to strengthen rapidly with frequent squalls and heavy rain in the small hours. There may also be flooding in low-lying areas. Members of the public should take all precautions as soon as possible, 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 will be rough and there will be swells, you are advised to stay away from the shoreline and not to engage in water sports.

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

    5. 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.

    6. 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 00:30 HKT 21/Oct/2016


    Tropical Cyclone Warning

    At 201500 UTC, Severe Typhoon Haima (1622) with central pressure 950 hectopascals was centred within 30 nautical miles of two zero point zero degrees north (20.0 N) one one six point nine degrees east (116.9 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 85 knots.

    Radius of over 33 knot winds 150 nautical miles over eastern semicircle, 180 nautical miles elsewhere.
    Radius of over 47 knot winds 100 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 211500 UTC
    Two four point five degrees north (24.5 N)
    One one four point six degrees east (114.6 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 221500 UTC
    Two nine point two degrees north (29.2 N)
    One one nine point eight degrees east (119.8 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 231500 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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