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Bulletin issued at 13:02 HKT 23/Aug/2016

At 1 p.m. at the Hong Kong Observatory the air temperature was 31 degrees Celsius and the relative humidity 61 per cent.
During the past hour the mean UV Index recorded at King's Park was 9. The intensity of UV radiation was very high.

Please be reminded that:

The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

King's Park 32 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 34 degrees;
Lau Fau Shan 31 degrees;
Tai Po 32 degrees;
Sha Tin 34 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 34 degrees;
Sai Kung 32 degrees;
Cheung Chau 31 degrees;
Chek Lap Kok 33 degrees;
Tsing Yi 32 degrees;
Shek Kong // degrees;
Tsuen Wan Ho Koon 31 degrees;
Tsuen Wan Shing Mun Valley 33 degrees;
Hong Kong Park 32 degrees;
Shau Kei Wan 30 degrees;
Kowloon City 33 degrees;
Happy Valley 33 degrees;
Wong Tai Sin 34 degrees;
Stanley 31 degrees;
Kwun Tong 33 degrees;
Sham Shui Po 33 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 34 degrees.


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


Climatological Information for 23 Aug

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
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 12:45 HKT 23/Aug/2016

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

The upper-air anticyclone is bringing generally fine weather to the coast of Guangdong. Locally, temperatures over many places rose to about 32 degrees around noon.

At noon, Severe Tropical Storm Lionrock was centred about 670 kilometres east-northeast of Okinawa. It is forecast to move south slowly, lingering over the seas east of the Ryukyu Islands.

Weather forecast for this afternoon and tonight

It will be fine. Very hot in the afternoon. Light winds.

Outlook : Mainly fine and very hot in the next couple of days. A few showers in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 23/08/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Information on Tropical Cyclones

Marine Weather Information and Forecast

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 23/Aug/2016

N0 WARNING.

GENERAL SITUATION AT 222100 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 230100 UTC:

HONG KONG= E 3-4. FINE. TEMP 33-28 C. =
KWANGTUNG= E 4. ISOL SHOWERS. =
TAIWAN STRAIT= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BASHI= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
PRATAS= E 4. ISOL SHOWERS. =
BALINTANG= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
SCARBOROUGH= E TO NE 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS AND SQUALLY TS. SEA UP TO 2 M. =
TONKIN= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. ISOL SHOWERS AND SQUALLY 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 12:30 HKT 23/Aug/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 23 August 2016

    Weather Situation:
    An easterly airstream is prevailing over the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 3 to 4.
    Slight to moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East force 4.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 4, becoming west to southwesterly winds of force 4 to 5 later. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind east force 1
      Visibility 27 Kilometres

    Shantou Wind east force 2
      Visibility 25 Kilometres

    Dongsha Wind north-northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind north force 2

    Macau Wind north-northeast force 2
      Visibility 19 Kilometres

    Xisha Wind northwest 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 09:30 HKT 23/AUG/2016
    (Next update at 17:30 HKT 23/AUG/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE UPPER-AIR ANTICYCLONE IS BRINGING GENERALLY
     FINE WEATHER TO THE COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/5-10                             27-34
   B.   2000 FT:  070/10                               23
   C.   5000 FT:  040/10                               21
   D.  10000 FT:  040/15                               12
   E.  18000 FT:  090/15                               1
   F.  24000 FT:  100/15                               MS12
   G.  30000 FT:  120/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 19000 FT      10 DEG. C LEVEL(S) : 12600 FT
   M. TURBULENCE    : NIL.
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT WINDS. MAINLY FINE. LOCALISED HAZE.=

    ===================================================================
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 18:57 HKT on 21 Aug 16

    VHHK SIGMET 3 VALID 211100/211500 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1830 E11530 - N1800 E11248 - N1930 E11130 - N2124 E11130 - N2200 E11300 - N1830 E11530 TOP FL400 MOV SW 05KT 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 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 23/Aug/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.0 C
Minimum Air Temperature                     27.3 C
Grass Minimum Temperature                   26.5 C
Relative Humidity                        65 - 91 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1929.0 mm
Against an average of                     1800.0 mm

Other Stations                Min                  Max
King's Park                  26.4 C               31.8 C
Wong Chuk Hang               26.0 C               32.5 C
Ta Kwu Ling                  25.4 C               33.5 C
Lau Fau Shan                 25.4 C               33.8 C
Tai Po                       26.0 C               32.2 C
Sha Tin                      25.9 C               32.6 C
Tuen Mun                     25.4 C               31.8 C
Tseung Kwan O                25.3 C               32.3 C
Sai Kung                     26.2 C               31.5 C
Cheung Chau                  25.7 C               30.0 C
Chek Lap Kok                 27.2 C               34.4 C
Tsing Yi                     25.5 C               34.0 C
Tsuen Wan Ho Koon            24.6 C               31.9 C
Tsuen Wan Shing Mun Valley   25.0 C               33.1 C
Hong Kong Park               26.2 C               31.7 C
Kowloon City                 26.5 C               32.7 C
Happy Valley                 26.3 C               33.9 C
Wong Tai Sin                 26.2 C               33.0 C
Stanley                      27.0 C               31.8 C
Kwun Tong                    27.1 C               32.1 C
Sham Shui Po                 26.7 C               33.0 C
Kai Tak Runway Park          26.9 C               31.0 C
Yuen Long Park               25.0 C               33.5 C

Duration of sunshine (King's Park):              10.0 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 11.
Sea surface temperature (Waglan Island):        27.3 C 

Yesterday's (22 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                         0.11
Tai Mei Tuk                         0.12
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 22 Aug
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