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

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Bulletin issued at 10:02 HKT 21/Oct/2016

At 10 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 88 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.6. The intensity of UV radiation was low.

Please be reminded that:

The Tropical Cyclone Signal No. 8 has been issued.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 25 degrees;
Tai Po 25 degrees;
Sha Tin 26 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 25 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 26 degrees;
Happy Valley 26 degrees;
Wong Tai Sin 26 degrees;
Stanley 25 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 25 degrees.

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

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

Here is the information on Typhoon Haima:
Location: 22.0 degrees north, 115.5 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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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 09:45 HKT 21/Oct/2016

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

Weather forecast for today

Strong to gale force northwesterly winds. Winds will become southwesterlies in the afternoon. Overcast with squalls and heavy rain. Seas will be rough with swells.

Outlook : Rain will ease off later tomorrow. 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 09:00 HKT 21/Oct/2016

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

GENERAL SITUATION AT 202100 UTC:
FOR DETAILS ON TYPHOON HAIMA (1622), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= NW 9-10, BEC W TO SW 11-12. DOWN TO 500 M IN FRQ SQUALLY HEAVY SHOWERS AND TS. SEA 8-10 M, UP TO 14 M LATER. SWELL E 2-3 M, S 2-3 M. TEMP 27-24 C. =
KWANGTUNG= CYCLONIC 12, BEC W TO SW 9-10. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 8-10 M, UP TO 14 M AT FIRST. SWELL E TO NE 5-7 M, S 4-6 M. =
TAIWAN STRAIT= S TO SE 7-8, UP TO 9 AT FIRST. 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= S 5-6, 7-8 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 6 M AT FIRST. SWELL S TO SW 3-5 M. =
PRATAS= S TO SW 9-10, 11-12 AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 8-10 M, UP TO 14 M AT FIRST. SWELL E TO NE 3-5 M, S TO SW 4-6 M. =
BALINTANG= S 5-6, 7-8 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 14 M AT FIRST. SWELL S TO SW 3-5 M. =
SCARBOROUGH= S TO SW 5-6, UP TO 7 AT FIRST. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL S TO SW 2-3 M. =
PARACEL= W TO NW 9-10, BEC SW 7-8. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 10 M AT FIRST. SWELL E TO NE 4-6 M. =
TONKIN= W 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= W TO SW 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 09:30 HKT 21/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 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 9 a.m., Typhoon Haima with maximum sustained winds of about 145 kilometres per hour near its centre was located at 21.8 degrees north, 115.7 degrees east. It is forecast to move northwest or north-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:
    Northwest force 9 to 10, becoming west to southwest force 11 to 12.
    Frequent heavy squally showers and thunderstorms.
    High seas, becoming phenomenal.

    Nan'ao:
    South to southeast force 11 to 12, becoming southwest force 7 to 8.
    Frequent heavy squally showers and thunderstorms.
    Phenomenal seas, becoming very rough later.

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

    South of Hong Kong:
    Northwest force 11 to 12, becoming west to southwest force 8 to 9.
    Frequent heavy squally showers and thunderstorms.
    Very high to phenomenal seas, becoming very rough.

    Shangchuan Dao:
    Northwest force 7 to 8, becoming west to southwest force 6 to 7.
    Occasional squally showers and thunderstorms.
    Rough to very rough seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 5 to 6, occasionally force 7 at first. Squally showers and thunderstorms in east at first.

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

    Waglan Island Wind northwest force 8 with gusts to force 9
      Visibility 12 Kilometres

    Shantou Wind east-southeast force 4
      Visibility 7 Kilometres in showers

    Dongsha Wind north-northeast force 9
      Visibility 3200 Metres in rain

    Huangmaozhou Wind west-northwest force 8

    Macau Wind northwest force 4
      Visibility 16 Kilometres

    Xisha Wind west-southwest force 2
      Visibility 15 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 09:30 HKT 21/OCT/2016
    (Next update at 17:30 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 :
     AT 9 A.M., TYPHOON HAIMA WAS CENTRED NEAR 21.8N
     115.7E AND IS FORECAST TO MOVE NORTHWEST OR
     NORTH-NORTHWEST AT ABOUT 14 KT TOWARDS THE
     VICINITY EAST OF THE PEARL RIVER ESTUARY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  300/35G45
                  BEC 240/30-35G40
                  TEMPO VRB/40G55 IN TS LATER
       OFFSHORE:  330/45G60
                  BEC 240/35G50                        25-28
   B.   2000 FT:  330/40-45G60
                  BEC 240/40-45G60                     22
   C.   5000 FT:  CYCLONIC/45-50                       19
   D.  10000 FT:  CYCLONIC/45-50                       12
   E.  18000 FT:  CYCLONIC/45-50                       MS2
   F.  24000 FT:  CYCLONIC/45-50                       MS11
   G.  30000 FT:  CYCLONIC/45-50                       MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      OVERCAST WITH SQUALLS AND HEAVY RAIN. 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: 17000 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : SEV
   N. SEA STATE     : 5.5-12.0 M    SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     STRONG TO GALE SOUTHWESTERLY WINDS. CLOUDY  WITH
     SQUALLY SHOWERS.=

    ===================================================================
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 09:40 HKT on 21 Oct 16

    VHHK SIGMET 1 VALID 210140/210600 VHHH- VHHK HONG KONG FIR TC HAIMA OBS AT 0000Z N2142 E11542 CB TOP FL480 WI 240NM OF CENTRE MOV NNW 12KT NC FCST 0600Z TC CENTRE N2248 E11506=

    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 09:55 HKT 21/Oct/2016

    Tropical Cyclone Bulletin

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

    The No. 8 Northwest Gale or Storm Signal is in force.

    This means that winds with mean speeds of 63 kilometres per hour or more are expected from the northwest quarter.

    At 10 a.m., Typhoon Haima was centred about 140 kilometres east-southeast of Hong Kong (near 22.0 degrees north 115.5 degrees east) and is forecast to move northwest or north-northwest at about 25 kilometres per hour towards the vicinity east of the Pearl River Estuary.

    According to the present forecast track, Haima will be closest to Hong Kong around noon, skirting about 100 km to the east of the territory. The No. 8 Gale or Storm Signal is expected to remain in force most of the time during the day.

    In the past few hours, winds generally over Hong Kong have been strengthening significantly, and gales are affecting many places in Hong Kong. Local winds will turn to the southwest this afternoon when Haima makes landfall. Places which have been sheltered before will become more exposed to the high winds. The rainbands of Haima are bringing squalls and heavy rain to the territory. Seas are rough and there are swells. Members of the public should stay on high alert, stay away from the shoreline, and not to engage in water sports.

    In the past hour, the maximum sustained winds recorded at Waglan Island, Green Island and Chek Lap Kok were 79, 67 and 60 kilometres per hour with maximum gusts 98, 86 and 76 kilometres per hour respectively.

    (Precautionary Announcements with No. 8 Signal)

    1. Complete all precautions in your home. Lock all windows and doors, fit bars into position and insert reinforced shutters and gates if they are available. Adhesive tape fixed to large window-panes in exposed positions will reduce damage by broken glass. Storm water drains should be cleared of leaves and rubbish.

    2. Do not stand near windows on the exposed side of your home. Move all furniture and valuables away from these areas. Make sure you have a safe place to shelter, should windows be broken.

    3. Flights at Hong Kong International Airport may be affected by the weather. Please contact your airline for the latest flight information before departing for the airport.

    4. Owners of neon signs are reminded that they should now arrange for the electricity supply to their signs to be cut off.

    5. Please listen to radio or watch TV for the latest weather information broadcast. You can also browse the Hong Kong Observatory's web site for the information.
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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 09:30 HKT 21/Oct/2016


    Tropical Cyclone Warning

    At 210000 UTC, Typhoon Haima (1622) with central pressure 955 hectopascals was centred within 30 nautical miles of two one point seven degrees north (21.7 N) one one five point seven degrees east (115.7 E) and is forecast to move northwest or north-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 220000 UTC
    Two seven point zero degrees north (27.0 N)
    One one five point eight degrees east (115.8 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 230000 UTC
    Dissipated over sea.

    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.



    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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