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

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Weather Information for South China Coastal Waters

Bulletin issued at 00:41 HKT 28/Aug/2016

At midnight at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 90 per cent.

Please be reminded that:

The Red Rainstorm Warning Signal has been issued.
The Thunderstorm Warning has been issued. It will remain effective until 3:00 a.m. today. Thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 28 degrees;
Ta Kwu Ling 28 degrees;
Lau Fau Shan 26 degrees;
Tai Po 29 degrees;
Sha Tin 28 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 28 degrees;
Sai Kung 29 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 26 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 25 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 26 degrees;
Stanley 29 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 28 degrees;
Yuen Long Park 27 degrees.

Between 10:45 and 11:45 p.m., lightning was detected within Lantau, New Territories West, Hong Kong and Kowloon. The rainfall recorded in various regions were:

Kowloon City 0 to 76 mm;
Sham Shui Po 25 to 46 mm;
Wong Tai Sin 0 to 38 mm;
Yau Tsim Mong 2 to 35 mm;
Sha Tin 0 to 33 mm;
Kwai Tsing 0 to 31 mm;
Central & Western District 0 to 21 mm;
Southern District 0 to 14 mm;
Yuen Long 0 to 9 mm;
Tuen Mun 0 to 7 mm;
Islands District 0 to 3 mm.


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


Climatological Information for 28 Aug

Regional Weather in Hong Kong

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Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 00:10 HKT 28/Aug/2016

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

A broad trough of low pressure brought showers to the coast of Guangdong and the northern part of the South China Sea yesterday. Locally, it was very hot with sunny periods and a few showers. More than 10 millimetres of rainfall were recorded over Hong Kong Island, Lantau Island and parts of the New Territories. The trough of low pressure will continue to bring showers and thunderstorms to the coast of Guangdong and the northern part of the South China Sea today.

At 11 p.m. last night, Severe Typhoon Lionrock was centred about 750 kilometres east-southeast of Okinawa. It is forecast to move northeast at about 18 kilometres per hour across the seas south of Japan.

Weather forecast for Hong Kong (Sunday, 28 Aug 2016)

Mainly cloudy with showers and a few squally thunderstorms. Showers will be heavy at first, and ease off gradually with sunny intervals during the day. Temperatures will range between 27 and 31 degrees. Moderate northerly winds.

Outlook : Sunny periods and isolated showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 29/08/2016; 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 27/Aug/2016

N0 WARNING.

GENERAL SITUATION AT 270900 UTC:
LOW 1004 HPA 19N 116E QSTNR INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 271300 UTC:

HONG KONG= N 4, OCNL 5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. TEMP 27-31 C. =
KWANGTUNG= N TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= N TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= W 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS LATER. SEA UP TO 3 M. =
PRATAS= W TO NW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
SCARBOROUGH= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PARACEL= W TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= N TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= W 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. 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 00:10 HKT 28/Aug/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:10 a.m. on 28 August 2016

    Weather Situation:
    A broad trough of low pressure is bringing unsettled weather to the coastal waters of Guangdong and the northern part of the South China Sea.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 4, occasionally force 5.
    Squally showers and thunderstorms. Shower will be heavy at first.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    North to northeast force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 4 to 5. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 1
      Visibility 11 Kilometres

    Shantou Wind southeast force 1
      Visibility 9 Kilometres

    Dongsha Wind east-northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind southwest force 1

    Macau Wind west-southwest force 1
      Visibility 4200 Metres in mist

    Xisha Wind west-southwest force 2
      Visibility 30 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 27/AUG/2016
    (Next update at 01:30 HKT 28/AUG/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A BROAD TROUGH OF LOW PRESSURE IS BRINGING
     UNSETTLED WEATHER TO THE COASTAL AREAS OF
     GUANGDONG AND THE NORTHERN PART OF THE SOUTH
     CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  320/5-10
                  TEMPO VRB/15G30 IN TS                31-27
   B.   2000 FT:  020/10                               25
   C.   5000 FT:  050/10                               20
   D.  10000 FT:  040/10                               12
   E.  18000 FT:  040/10                               MS2
   F.  24000 FT:  060/15                               MS12
   G.  30000 FT:  080/20                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY. A FEW SHOWERS AND ISOLATED
      THUNDERSTORMS. LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT.  TEMPO FEW CB 1000 FT SCT 2000 FT
      BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN SHOWERS/MIST.  TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTHERLY WINDS.  A FEW
     SHOWERS AND ISOLATED THUNDERSTORMS AT FIRST.
     SUNNY INTERVALS DURING THE DAY.=

    ===================================================================
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 22:50 HKT on 27 Aug 16

    VHHK SIGMET 5 VALID 271450/271850 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1700 E11412 - N1800 E11354 - N2012 E11348 - N2000 E11642 - N1700 E11412 TOP FL400 MOV W 05KT NC=

    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 21:30 HKT 19/Aug/2016


    Tropical Cyclone Warning

    At 191200 UTC, Tropical Storm Dianmu (1608) with central pressure 988 hectopascals was centred within 60 nautical miles of two zero point eight degrees north (20.8 N) one zero five point four degrees east (105.4 E) and is forecast to weaken and move west at about 14 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 60 nautical miles over eastern semicircle, 30 nautical miles elsewhere.
    Radius of over 2 metre waves 150 nautical miles.

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

    Forecast position and intensity at 201200 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 28/Aug/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.2 C
Minimum Air Temperature                     27.0 C
Grass Minimum Temperature                   27.4 C
Relative Humidity                        70 - 90 Percent
Rainfall                                     3.5 mm 
Total rainfall since 1st January          1932.5 mm
Against an average of                     1869.6 mm

Other Stations                Min                  Max
King's Park                  25.5 C               33.0 C
Wong Chuk Hang               27.1 C               32.5 C
Ta Kwu Ling                  25.3 C               33.5 C
Lau Fau Shan                 25.6 C               33.1 C
Tai Po                       26.6 C               31.6 C
Sha Tin                      26.6 C               33.3 C
Tuen Mun                     26.0 C               32.8 C
Tseung Kwan O                26.0 C               33.6 C
Sai Kung                     27.4 C               33.1 C
Cheung Chau                  26.8 C               30.9 C
Chek Lap Kok                 25.6 C               34.3 C
Tsing Yi                     25.7 C               33.6 C
Shek Kong                    26.1 C               33.4 C
Tsuen Wan Ho Koon            25.4 C               32.4 C
Tsuen Wan Shing Mun Valley   26.4 C               34.0 C
Hong Kong Park               27.0 C               32.9 C
Shau Kei Wan                 27.4 C               31.4 C
Kowloon City                 24.7 C               33.8 C
Happy Valley                 27.7 C               33.7 C
Wong Tai Sin                 26.1 C               34.0 C
Stanley                      27.6 C               32.8 C
Kwun Tong                    27.7 C               32.8 C
Sham Shui Po                 25.4 C               33.3 C
Kai Tak Runway Park          27.6 C               31.8 C
Yuen Long Park               26.3 C               34.1 C

Duration of sunshine (King's Park):              6.2 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 9.
 

Yesterday's (27 Aug 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 27 Aug
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