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Bulletin issued at 10:02 HKT 25/Jun/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 4. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 29 degrees;
Ta Kwu Ling 31 degrees;
Lau Fau Shan 30 degrees;
Tai Po 29 degrees;
Sha Tin 30 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 30 degrees;
Sai Kung 31 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 29 degrees;
Shek Kong 31 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 29 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 28 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 30 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 31 degrees;
Tai Mei Tuk 29 degrees.

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

Central & Western District 0 to 1 mm;
Southern District 0 to 1 mm;
Wan Chai 0 to 1 mm.


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


Climatological Information for 25 Jun

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 09:45 HKT 25/Jun/2017

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

A southwesterly airstream is bringing hot weather to the coastal areas of Guangdong.

Weather forecast for today

Hot with sunny periods and a few showers. Moderate southwesterly winds, fresh at times.

Outlook : Mainly fine and very hot in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 25/06/2017; 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 25/Jun/2017

N0 WARNING.

GENERAL SITUATION AT 242100 UTC:
TROUGH 24N 105E 27N 113E 30N 120E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. TEMP 32-28 C. =
KWANGTUNG= S TO SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S UP TO 2 M. =
TAIWAN STRAIT= SW 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL SW UP TO 2 M. =
BASHI= SW 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL SW UP TO 2 M. =
PRATAS= S TO SW 5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL S UP TO 2 M. =
BALINTANG= SW 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
SCARBOROUGH= S TO SW 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL S UP TO 2 M. =
PARACEL= S 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S UP TO 2 M. =
TONKIN= S 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S UP TO 2 M. =
DANANG= S 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S 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 09:30 HKT 25/Jun/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 25 June 2017

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southwest force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    Southwest force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    South force 5 to 6.
    Isolated squally 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 west-southwest force 5 with gusts to force 7
      Visibility 32 Kilometres

    Shantou Wind southwest force 2
      Visibility 30 Kilometres

    Dongsha Wind west-southwest force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind southwest force 2

    Macau Wind south force 1
      Visibility 17 Kilometres

    Xisha Wind south force 3
      Visibility 24 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 25/JUN/2017
    (Next update at 17:30 HKT 25/JUN/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHWESTERLY AIRSTREAM IS BRINGING SHOWERS 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:  220/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  220/15-20                            29-32
   B.   2000 FT:  220/15-20, OCNL 25                   24
   C.   5000 FT:  220/25                               20
   D.  10000 FT:  210/20                               12
   E.  18000 FT:  200/20                               MS3
   F.  24000 FT:  190/15                               MS12
   G.  30000 FT:  110/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY PERIODS WITH A FEW SHOWERS AND ISOLATED
      SQUALLY THUNDERSTORMS.
   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) : 11800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND NEAR HILLS.
                      MOD OFFSHORE.
   N. SEA STATE     : 2.0 M         SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS, FRESH AT TIMES.
     MAINLY CLOUDY WITH A FEW 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 25/Jun/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.8 C
Minimum Air Temperature                     26.4 C
Grass Minimum Temperature                   26.6 C
Relative Humidity                        75 - 95 Percent
Rainfall                                    18.3 mm 
Total rainfall since 1st January          1184.2 mm
Against an average of                     1004.9 mm

Other Stations                Min                  Max
King's Park                  26.4 C               31.1 C
Ta Kwu Ling                  25.5 C               32.7 C
Lau Fau Shan                 25.7 C               31.5 C
Tai Po                       26.0 C               31.4 C
Sha Tin                      26.0 C               32.4 C
Tuen Mun                     25.8 C               31.8 C
Tseung Kwan O                26.7 C               32.6 C
Sai Kung                     27.1 C               32.9 C
Cheung Chau                  25.5 C               30.4 C
Chek Lap Kok                 25.7 C               32.3 C
Tsing Yi                     26.5 C               31.7 C
Shek Kong                    25.8 C               31.4 C
Tsuen Wan Ho Koon            25.9 C               28.9 C
Tsuen Wan Shing Mun Valley   26.3 C               30.8 C
Hong Kong Park               25.6 C               31.3 C
Shau Kei Wan                 27.0 C               31.5 C
Kowloon City                 26.2 C               31.4 C
Happy Valley                 27.4 C               30.9 C
Wong Tai Sin                 26.8 C               31.3 C
Stanley                      26.4 C               30.7 C
Kwun Tong                    27.0 C               31.4 C
Sham Shui Po                 26.3 C               31.6 C
Kai Tak Runway Park          27.0 C               31.7 C
Yuen Long Park               26.2 C               31.9 C
Tai Mei Tuk               26.1 C               32.5 C

Duration of sunshine (King's Park):              6.1 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 10.
Sea surface temperature (Waglan Island):        25.7 C 

Yesterday's (24 Jun 2017) 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                             0.08
Kat O                               0.08
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
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                      0.13
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 24 Jun
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Jun 2017> 

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