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Bulletin issued at 00:16 HKT 18/Jun/2017

At midnight at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 97 per cent.

The air temperatures at other places were:

King's Park 25 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 24 degrees;
Tai Po 24 degrees;
Sha Tin 25 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 25 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 25 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 24 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 24 degrees;
Stanley 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 24 degrees;
Tai Mei Tuk 24 degrees.

Between 10:45 and 11:45 p.m., the rainfall recorded in various regions were:

Tai Po 1 to 6 mm;
Sai Kung 1 to 5 mm;
Sha Tin 0 to 4 mm;
North District 0 to 3 mm;
Yuen Long 0 to 1 mm;
Wong Tai Sin 0 to 1 mm;
Kwun Tong 0 to 1 mm.


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


Climatological Information for 18 Jun

Regional Weather in Hong Kong

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

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 00:00 HKT 18/Jun/2017

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

A trough of low pressure brought showers and thunderstorms to the northern part of the South China Sea and the coast of Guangdong yesterday. Locally, it was cloudy with heavy showers and squally thunderstorms. More than 100 millimetres of rainfall were recorded over most parts of the territory. The trough of low pressure is expected to linger around the south China coast in the next couple of days, bringing thundery showers to the region.

Weather forecast for Hong Kong (Sunday, 18 Jun 2017)

Cloudy with showers and a few thunderstorms. Temperatures will range between 24 and 29 degrees. Light to moderate southwesterly winds.

Outlook : Weather will still be unsettled with occasional thundery showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 18/06/2017; 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 21:00 HKT 17/Jun/2017

N0 WARNING.

GENERAL SITUATION AT 170900 UTC:
TROUGH 19N 107E 23N 115E 24N 120E 24N 125E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 171300 UTC:

HONG KONG= SW 4-5, OCNL 6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. TEMP 25-29 C. =
KWANGTUNG= SW 5, OCNL 6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
TAIWAN STRAIT= NE 5-6, OCNL 7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
BASHI= SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
PRATAS= SW 5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
BALINTANG= SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW UP TO 2 M. =
SCARBOROUGH= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
PARACEL= S TO SW 5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
TONKIN= NE 5, BEC SW 5. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2 M. =
DANANG= S TO SW 5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY 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.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
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    Bulletin issued at 23:30 HKT 17/Jun/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 17 June 2017

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The unsettled weather associated with a trough of low pressure is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southwest force 4 to 5, occasionally force 6.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    Southwest force 5, occasionally force 6.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Southwesterly winds of force 4 to 5, occasionally force 6. Scattered squally showers and thunderstorms.

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

    Shantou Wind east-northeast force 1
      Visibility 12 Kilometres in showers

    Dongsha Wind south-southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind west-northwest force 2

    Macau Wind west-southwest force 1
      Visibility 300 Metres in rain

    Xisha Wind south-southwest force 4
      Visibility 11 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 17:30 HKT 17/JUN/2017
    (Next update at 01:30 HKT 18/JUN/2017)
    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 :
     THE UNSETTLED WEATHER ASSOCIATED WITH A TROUGH
     OF LOW PRESSURE IS AFFECTING THE SOUTH CHINA
     COASTAL AREAS.
     
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  230/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  230/20-25                            26-24
   B.   2000 FT:  270/20-25                            23
   C.   5000 FT:  240/25                               19
   D.  10000 FT:  250/25                               11
   E.  18000 FT:  240/15                               MS3
   F.  24000 FT:  270/10                               MS12
   G.  30000 FT:  270/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH SHOWERS AND THUNDERSTORMS. SHOWERS
      WILL BE HEAVIER AT TIMES
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT  BKN 6000 FT.  TEMPO
      FEW CB 800 FT  SCT 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 2500 M IN SHOWERS.  TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH SOUTHWESTERLY WINDS. CLOUDY
     WITH SHOWERS AND THUNDERSTORMS. SHOWERS WILL BE
     HEAVIER AT TIMES IN THE MORNING.=

    ===================================================================
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 23:30 HKT on 17 Jun 17

    VHHK SIGMET 3 VALID 171130/171530 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1900 E11154 - N1930 E11130 - N2124 E11130 - N2230 E11342 - N2336 E11718 - N2036 E11606 - N1900 E11154 TOP FL400 MOV E 10KT NC= VHHK SIGMET 4 VALID 171530/171930 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1830 E11224 - N1930 E11130 - N2124 E11130 - N2230 E11342 - N2342 E11730 - N2012 E11630 - N1830 E11224 TOP FL400 MOV E 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 18/Jun/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.4 C
Minimum Air Temperature                     24.4 C
Grass Minimum Temperature                   24.0 C
Relative Humidity                        92 - 98 Percent
Rainfall                                   138.0 mm 
Total rainfall since 1st January           977.9 mm
Against an average of                      914.9 mm

Other Stations                Min                  Max
King's Park                  24.3 C               27.5 C
Ta Kwu Ling                  24.1 C               26.1 C
Lau Fau Shan                 24.1 C               25.9 C
Tai Po                       24.1 C               25.7 C
Sha Tin                      24.5 C               26.8 C
Tuen Mun                     24.5 C               26.2 C
Tseung Kwan O                24.3 C               28.5 C
Sai Kung                     24.7 C               26.7 C
Cheung Chau                  24.3 C               27.4 C
Chek Lap Kok                 25.2 C               28.2 C
Tsing Yi                     24.6 C               27.0 C
Shek Kong                    24.4 C               26.2 C
Tsuen Wan Ho Koon            23.8 C               26.1 C
Tsuen Wan Shing Mun Valley   24.3 C               26.5 C
Hong Kong Park               24.2 C               28.7 C
Shau Kei Wan                 23.6 C               29.2 C
Kowloon City                 24.1 C               27.1 C
Happy Valley                 24.6 C               29.4 C
Wong Tai Sin                 24.2 C               27.5 C
Stanley                      24.3 C               28.6 C
Kwun Tong                    24.2 C               29.1 C
Sham Shui Po                 24.6 C               27.2 C
Kai Tak Runway Park          24.5 C               29.4 C
Yuen Long Park               24.2 C               26.1 C
Tai Mei Tuk               24.0 C               26.0 C

Duration of sunshine (King's Park):              0.0 H
The mean UV index recorded at King's Park yesterday was 0.8,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
 

Yesterday's (17 Jun 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.10 to
0.15 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                           0.10
Tap Mun                             0.11
Kat O                               0.10
Yuen Ng Fan                         0.14
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.14
Cape D'Aguilar                      0.14
Chek Lap Kok                        0.15

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 17 Jun
     2003copy right image | Important notices | Privacy policy Last revision date: <18 Jun 2017> 

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