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Bulletin issued at 13:31 HKT 23/Jun/2017

At 1 p.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 87 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

Please be reminded that:

The Thunderstorm Warning was issued at 1:30 p.m. It will remain effective until 2:30 p.m. today. Isolated thunderstorms are expected to occur over New Territories.
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 28 degrees;
Ta Kwu Ling 33 degrees;
Lau Fau Shan 32 degrees;
Tai Po 31 degrees;
Sha Tin 29 degrees;
Tuen Mun 32 degrees;
Tseung Kwan O 30 degrees;
Sai Kung 30 degrees;
Cheung Chau 30 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 30 degrees;
Shek Kong 32 degrees;
Tsuen Wan Ho Koon 29 degrees;
Tsuen Wan Shing Mun Valley 31 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 28 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 30 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 28 degrees;
Yuen Long Park 32 degrees;
Tai Mei Tuk 29 degrees.

Between 11:45 a.m. and 12:45 p.m., the rainfall recorded in various regions were:

Southern District 0 to 7 mm;
Central & Western District 0 to 7 mm;
Wan Chai 4 to 7 mm;
Sham Shui Po 0 to 5 mm;
Eastern District 0 to 4 mm;
Yau Tsim Mong 2 to 3 mm;
Sha Tin 0 to 3 mm;
Islands District 0 to 2 mm;
Kowloon City 1 to 2 mm;
Kwun Tong 0 to 2 mm;
Sai Kung 0 to 1 mm.


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


Climatological Information for 23 Jun

Regional Weather in Hong Kong

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Bulletin updated at 13:30 HKT 23/Jun/2017

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

The subtropical ridge is bringing very hot weather to the southeastern part of China. Meanwhile, showers are affecting the coast of Guangdong.

Weather forecast for this afternoon and tonight

There will be one or two showers and isolated thunderstorms. Very hot with sunny periods in the afternoon. Moderate southerly winds.

Outlook : Mainly fine and very hot apart from isolated showers in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 23/06/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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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/Jun/2017

N0 WARNING.

GENERAL SITUATION AT 222100 UTC:
TROUGH 30N 118E 30N 125E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 230100 UTC:

HONG KONG= S 4-5. ISOL SHOWERS. SEA UP TO 2 M. TEMP 33-28 C. =
KWANGTUNG= S 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
TAIWAN STRAIT= SW 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
BASHI= SW 4-5. FINE. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
PRATAS= S 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
SCARBOROUGH= S 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
TONKIN= S 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S UP TO 2 M. =
DANANG= S 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 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 12:30 HKT 23/Jun/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 23 June 2017

    Warnings:
    Strong winds in south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    A southerly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4 to 5.
    Isolated showers.
    Moderate seas.

    Nan'ao and Shanwei:
    South force 4 to 5.
    Moderate seas.

    South of Hong Kong:
    South force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Shangchuan Dao:
    South force 4 to 5, occasionally force 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 4 to 5, occasionally force 6. Isolated showers and thunderstorms.

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

    Waglan Island Wind south force 3
      Visibility 34 Kilometres

    Shantou Wind south-southwest force 2
      Visibility 30 Kilometres

    Huangmaozhou Wind south-southeast force 4

    Macau Wind south-southeast force 3
      Visibility 35 Kilometres

    Xisha Wind south force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 23/JUN/2017
    (Next update at 17:30 HKT 23/JUN/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  180/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  180/15                               29-33
   B.   2000 FT:  190/15, OCNL 20                      25
   C.   5000 FT:  190/15                               20
   D.  10000 FT:  200/20                               13
   E.  18000 FT:  190/10                               MS2
   F.  24000 FT:  200/10                               MS12
   G.  30000 FT:  150/10                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE APART FROM ISOLATED SHOWERS.
      ISOLATED THUNDERSTORMS OVER INLAND LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 12400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS.  MAINLY
     FINE APART FROM ISOLATED 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
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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 11:30 HKT on 21 Jun 17

    VHHK SIGMET 1 VALID 210330/210730 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2206 E11300 - N2230 E11342 - N2242 E11430 - N2200 E11430 - N2112 E11300 - N2206 E11300 TOP FL400 MOV NE 10KT NC= VHHK SIGMET 8 VALID 202330/210330 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2206 E11300 - N2230 E11342 - N2342 E11730 - N2236 E11730 - N2112 E11300 - N2206 E11300 TOP FL400 MOV NE 10KT 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

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




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

    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/Jun/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.4 C
Minimum Air Temperature                     28.0 C
Grass Minimum Temperature                   26.7 C
Relative Humidity                        67 - 90 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          1155.4 mm
Against an average of                      966.5 mm

Other Stations                Min                  Max
King's Park                  27.6 C               32.0 C
Ta Kwu Ling                  26.2 C               32.7 C
Lau Fau Shan                 27.0 C               32.2 C
Tai Po                       26.6 C               32.0 C
Sha Tin                      28.1 C               32.4 C
Tuen Mun                     27.6 C               32.3 C
Tseung Kwan O                27.2 C               33.0 C
Sai Kung                     27.4 C               33.0 C
Cheung Chau                  26.7 C               30.8 C
Chek Lap Kok                 28.7 C               32.8 C
Tsing Yi                     27.1 C               31.8 C
Shek Kong                    27.9 C               32.6 C
Tsuen Wan Ho Koon            26.3 C               30.1 C
Tsuen Wan Shing Mun Valley   26.9 C               30.8 C
Hong Kong Park               27.3 C               31.3 C
Shau Kei Wan                 27.0 C               31.8 C
Kowloon City                 27.8 C               32.5 C
Happy Valley                 28.2 C               32.8 C
Wong Tai Sin                 27.5 C               31.6 C
Stanley                      27.8 C               31.9 C
Kwun Tong                    27.8 C               32.4 C
Sham Shui Po                 28.0 C               32.4 C
Kai Tak Runway Park          28.0 C               32.4 C
Yuen Long Park               27.0 C               32.3 C
Tai Mei Tuk               26.4 C               31.7 C

Duration of sunshine (King's Park):              5.6 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 9.
 

Yesterday's (22 Jun 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.07 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                           0.07
Tap Mun                             0.08
Kat O                               0.08
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.11
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.12
Chek Lap Kok                        0.14

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2016, 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 Jun
     2003copy right image | Important notices | Privacy policy Last revision date: <23 Jun 2017> 

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