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Bulletin issued at 03:02 HKT 20/Oct/2016

At 3 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 91 per cent.

Tropical Cyclone Haima will move across the northern part of Luzon and enter the South China Sea on Thursday morning. The Observatory will issue Standby Signal, No. 1 by then. According to the present forecast track, Haima will edge closer to the coast of Guangdong on Friday, and may skirt within 100 kilometers of Hong Kong, posing a threat to the territory. The weather is expected to deteriorate significantly on Friday. There will be frequent squalls and heavy rain. Seas will be rough with swells. Members of the public should remain vigilant and take all precautions as early as possible.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 24 degrees;
Tai Po 25 degrees;
Sha Tin 26 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 25 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 26 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 25 degrees;
Kowloon City 25 degrees;
Happy Valley 26 degrees;
Wong Tai Sin 26 degrees;
Stanley 26 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 25 degrees.

Here is the information on Severe Typhoon Haima at 3 a.m.:
Location: 17.6 degrees north, 121.4 degrees east.


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


Climatological Information for 20 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 02:45 HKT 20/Oct/2016

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

A cloud band is covering the coast of Guangdong and the northern part of the South China Sea.

At 2 a.m., Super Typhoon Haima was centred about 350 kilometres north-northeast of Manila. It is forecast to move west-northwest at about 28 kilometres per hour across the northern part of Luzon. Meanwhile, Tropical Depression Sarika was centred about 100 kilometres southwest of Nanning. It is forecast to move north-northwest at about 10 kilometres per hour into inland Guangxi.

Weather forecast for today

Cloudy with one or two showers. Sunny periods during the day. Temperatures will range between 25 and 31 degrees. Moderate to fresh east to northeasterly winds, occasionally strong offshore later. There will be swells later.

Outlook : Frequent heavy rain with squalls on Friday. Seas will be rough with swells. Rain will ease off later on Saturday.


(The above forecast period is valid up to 23:59 HKT today, 20/10/2016; 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 19/Oct/2016

HURRICANE WARNING AREAS: PRATAS, BALINTANG AND SCARBOROUGH.
GALE WARNING AREAS: KWANGTUNG, BASHI AND PARACEL.

GENERAL SITUATION AT 190900 UTC:
FOR DETAILS ON TROPICAL DEPRESSION SARIKA (1621) AND SUPER TYPHOON HAIMA (1622), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 191300 UTC:

HONG KONG= E TO NE 5-6, OCNL 7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL E 2 M. TEMP 25-31 C. =
KWANGTUNG= E TO NE 6-7, N 8-9 IN E LATER. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, 6-8 M IN E LATER. SWELL E TO NE 3-5 M LATER. =
TAIWAN STRAIT= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS LATER. SEA 3-4 M. SWELL NE 2 M. =
BASHI= E TO NE 8-9. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M. SWELL E TO NE 3-5 M. =
PRATAS= N TO NE 6-7, CYCLONIC 12 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, UP TO 14 M LATER. SWELL E TO NE 3-5 M, UP TO 7 M LATER. =
BALINTANG= E TO NE 10-11, CYCLONIC 12 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 10-12 M, UP TO 14 M LATER. SWELL E TO NE 3-5 M, UP TO 7 M LATER. =
SCARBOROUGH= N TO NE 7-8, CYCLONIC 12 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, UP TO 14 M LATER. SWELL E TO NE 5-7 M LATER. =
PARACEL= N TO NW 6-7, 8-9 IN E LATER. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, 6-8 M IN E LATER. SWELL E TO NE 3-5 M LATER. =
TONKIN= W TO SW 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. =
DANANG= N TO NW 5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 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 20/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 20 October 2016

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

    Weather Situation:
    Super Typhoon Haima has weakened into a severe typhoon. At 3 a.m., Haima with maximum sustained winds of about 175 kilometres per hour near its centre was located at 17.6 degrees north, 121.4 degrees east. It is forecast to move west-northwest at about 28 kilometres per hour across the northern part of Luzon. Besides, Tropical Depression Sarika has weakened into an area of low pressure.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5 to 6, occasionally force 7.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 6 to 7, becoming east up to force 11 in south later.
    Frequent heavy squally showers and thunderstorms later.
    Rough seas, becoming very high later.

    Shanwei:
    East to northeast force 6 to 7, up to force 10 in south later.
    Frequent heavy squally showers and thunderstorms later.
    Rough seas, becoming high later.

    South of Hong Kong:
    East to northeast force 6 to 7, becoming north force 8 to 9 in south later.
    Scattered heavy squally showers and thunderstorms.
    Rough seas, becoming very rough later.

    Shangchuan Dao:
    South to southeast force 5 to 6, becoming north force 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 5 to 6, cyclonic winds of up to force 12 in east at first. Occasional heavy squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 3
      Visibility 8 Kilometres

    Shantou Wind southeast force 1
      Visibility 29 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind east force 3
      Visibility 9 Kilometres

    Xisha Wind north-northeast force 1
      Visibility 7 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 01:30 HKT 20/OCT/2016
    (Next update at 9:00-9:30 HKT 20/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 11 P.M., SUPER TYPHOON HAIMA WAS CENTRED NEAR
     17.6 DEGREES NORTH, 112.5 DEGREES EAST.  IT IS
     FORECAST TO MOVE WEST-NORTHWEST AT ABOUT 15
     KNOTS ACROSS  THE NORTHERN PART OF LUZON. 
     MEANWHILE, TROPICAL STORM SARIKA HAS WEAKENED
     INTO A TROPICAL DEPRESSION. SARIKA WAS CENTRED
     NEAR 22.1 DEGREES NORTH, 107.6 DEGREES EAST. IT
     IS FORECAST TO MOVE NORTH-NORTHWEST AT ABOUT 5
     KNOTS INTO INLAND GUANGXI.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  40/20, OCNL 25 AT FIRST              27-30
   B.   2000 FT:  40/20, OCNL 25 AT FIRST              21
   C.   5000 FT:  60/20                                19
   D.  10000 FT:  100/20                               12
   E.  18000 FT:  160/20                               MS3
   F.  24000 FT:  140/20                               MS13
   G.  30000 FT:  140/25                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY WITH ONE OR TWO SHOWERS. A FEW ISOLATED
      THUNDERSTORMS.  SUNNY PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2500 FT, TEMPO FEW CB 800 FT
      SCT 2000 FT BKN 5000 FT
   K. VISIBILITY    : 7 KM. TEMPO 2500 M IN SHOWERS. TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS.
     OCCASIONAL STRONG OFFSHORE.=

    ===================================================================
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 19:25 HKT on 19 Oct 16

    VHHK SIGMET 3 VALID 191130/191530 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2154 E11230 - N2230 E11342 - N2236 E11412 - N2006 E11436 - N2006 E11300 - N2154 E11230 TOP FL420 MOV NW 10KT WKN=

    Please click here for more about the SIGMET

    Tropical Cyclone Warning
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    Tropical Cyclone Warning

    There is no tropical cyclone warning signal.

    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

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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 03:30 HKT 20/Oct/2016


    Tropical Cyclone Warning

    Super Typhoon Haima (1622) has weakened into a Severe Typhoon with central pressure 935 hectopascals. At 191800 UTC, it was centred within 60 nautical miles of one seven point seven degrees north (17.7 N) one two one point six degrees east (121.6 E) and is forecast to move west-northwest at about 15 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 95 knots.

    Radius of over 33 knot winds 180 nautical miles.
    Radius of over 47 knot winds 120 nautical miles.
    Radius of over 63 knot winds 45 nautical miles.
    Radius of over 2 metre waves 300 nautical miles.

    Forecast position and intensity at 201800 UTC
    Two zero point one degrees north (20.1 N)
    One one six point three degrees east (116.3 E)
    Maximum winds 75 knots.

    Forecast position and intensity at 211800 UTC
    Two four point two degrees north (24.2 N)
    One one four point three degrees east (114.3 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 221800 UTC
    Two eight point eight degrees north (28.8 N)
    One one eight point nine degrees east (118.9 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 231800 UTC
    Dissipated over sea.

    Bulletin issued at 18:31 HKT 19/Oct/2016


    Tropical Cyclone Warning

    Tropical Storm Sarika (1621) has weakened into a Tropical Depression with central pressure 998 hectopascals. At 190900 UTC, it was centred within 60 nautical miles of two one point eight degrees north (21.8 N) one zero seven point nine degrees east (107.9 E) and is forecast to move north at about 5 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 30 knots.

    Radius of over 2 metre waves 120 nautical miles.

    No further warnings on this Tropical Depression will be issued by the Hong Kong Observatory unless re-intensification takes place.

    Forecast position and intensity at 200900 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 20/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.9 C
Minimum Air Temperature                     24.4 C
Grass Minimum Temperature                   24.0 C
Relative Humidity                        92 - 99 Percent
Rainfall                                   223.4 mm 
Total rainfall since 1st January          2814.0 mm
Against an average of                     2310.5 mm

Other Stations                Min                  Max
King's Park                  24.0 C               25.9 C
Wong Chuk Hang               24.1 C               26.3 C
Ta Kwu Ling                  24.1 C               26.4 C
Lau Fau Shan                 23.7 C               26.6 C
Tai Po                       24.0 C               26.3 C
Sha Tin                      24.6 C               26.8 C
Tuen Mun                     24.5 C               26.4 C
Tseung Kwan O                24.1 C               26.1 C
Sai Kung                     24.3 C               26.5 C
Cheung Chau                  24.1 C               26.2 C
Chek Lap Kok                 24.9 C               28.8 C
Tsing Yi                     24.8 C               27.0 C
Shek Kong                    24.6 C               27.2 C
Tsuen Wan Ho Koon            23.5 C               25.1 C
Tsuen Wan Shing Mun Valley   24.0 C               26.5 C
Hong Kong Park               24.4 C               26.5 C
Shau Kei Wan                 24.1 C               26.4 C
Kowloon City                 24.0 C               26.0 C
Happy Valley                 24.8 C               27.2 C
Wong Tai Sin                 24.2 C               26.4 C
Stanley                      24.4 C               26.5 C
Kwun Tong                    24.4 C               26.3 C
Sham Shui Po                 24.5 C               27.0 C
Kai Tak Runway Park          24.8 C               27.1 C
Yuen Long Park               24.3 C               27.6 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 0.6,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (19 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                         0.11
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                        0.13

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 19 Oct
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