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Bulletin issued at 23:02 HKT 20/Jun/2017

At 11 p.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 89 per cent.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 12:15 a.m. tomorrow. A few thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

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

Between 9:45 and 10:45 p.m., lightning was detected within Lantau.


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


Climatological Information for 20 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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Bulletin updated at 23:15 HKT 20/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 coast of Guangdong yesterday. Locally, it was cloudy with showers and a few squally thunderstorms. More than 20 millimetres of rainfall were generally recorded over the territory, and rainfall even exceeded 40 millimetres over parts of the New Territories. The trough of low pressure will continue to bring showers and thunderstorms to the south China coast today.

Weather forecast for Hong Kong (Wednesday, 21 Jun 2017)

Mainly cloudy with showers. There will be a few squally thunderstorms in the morning. Showers will ease off gradually later. Temperatures will range between 26 and 30 degrees. Moderate south to southwesterly winds, occasionally fresh offshore.

Outlook : Hot with sunny periods in the following few days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 21/06/2017; 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 20/Jun/2017

N0 WARNING.

GENERAL SITUATION AT 200900 UTC:
TROUGH 22N 107E 25N 115E 30N 125E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 201300 UTC:

HONG KONG= S TO SW 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. TEMP 26-30 C. =
KWANGTUNG= S TO SW 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
TAIWAN STRAIT= SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW UP TO 2 M. =
BASHI= S TO SW 4-5, OCNL 6. FINE. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
PRATAS= S TO SW 4-5, OCNL 6. DOWN TO 2000 M IN ISOL SQUALLY SHOWERS AND TS IN N. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
BALINTANG= S TO SW 4-5. FINE. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
SCARBOROUGH= S 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
PARACEL= S TO SW 4-5, OCNL 6. DOWN TO 2000 M IN ISOL SQUALLY SHOWERS AND TS IN N. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
TONKIN= S 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= S 4-5, OCNL 6. DOWN TO 2000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 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
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    Bulletin issued at 23:30 HKT 20/Jun/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 20 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:
    South to southwest force 4 to 5, occasionally force 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South to southwest force 4 to 5, occasionally force 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

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

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

    Waglan Island Wind south-southwest force 2
      Visibility 12 Kilometres

    Shantou Wind south-southwest force 1
      Visibility 30 Kilometres

    Dongsha Wind south-southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southeast force 4

    Macau Wind west-southwest force 1
      Visibility 24 Kilometres

    Xisha Wind south-southwest force 3
      Visibility 17 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 20/JUN/2017
    (Next update at 01:30 HKT 21/JUN/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB ON HIGH GROUND. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A
     TROUGH OF LOW PRESSURE ARE AFFECTING THE COAST
     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:  220/10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  210/10-15, OCNL 20 LATER             29-24
   B.   2000 FT:  210/20, OCNL 25                      22
   C.   5000 FT:  220/20-25                            20
   D.  10000 FT:  230/25                               11
   E.  18000 FT:  240/20-25                            MS2
   F.  24000 FT:  250/15                               MS12
   G.  30000 FT:  280/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND SQUALLY THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT  BKN 8000 FT.  
      TEMPO FEW CB 800 FT  SCT  1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN SHOWERS.  
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND NEAR HILLS. 
                      MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS, FRESH AT
     TIMES.  MAINLY CLOUDY WITH SHOWERS AND SQUALLY
     THUNDERSTORMS.=

    ===================================================================
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 18:25 HKT on 20 Jun 17

    VHHK SIGMET 3 VALID 200900/201300 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1906 E11154 - N1930 E11130 - N2124 E11130 - N2230 E11342 - N2330 E11648 - N2118 E11706 - N1906 E11154 TOP FL400 MOV NE 10KT NC= VHHK SIGMET 4 VALID 201025/201425 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2306 E11730 - N2142 E11730 - N2036 E11424 - N2206 E11424 - N2306 E11730 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 20/Jun/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.3 C
Minimum Air Temperature                     25.3 C
Grass Minimum Temperature                   24.6 C
Relative Humidity                        77 - 98 Percent
Rainfall                                    32.6 mm 
Total rainfall since 1st January          1034.7 mm
Against an average of                      936.0 mm

Other Stations                Min                  Max
King's Park                  25.2 C               28.4 C
Ta Kwu Ling                  24.4 C               30.1 C
Lau Fau Shan                 24.6 C               29.6 C
Tai Po                       24.8 C               28.2 C
Sha Tin                      25.0 C               29.2 C
Tuen Mun                     25.0 C               29.4 C
Tseung Kwan O                24.4 C               28.3 C
Sai Kung                     25.2 C               29.5 C
Cheung Chau                  24.4 C               27.8 C
Chek Lap Kok                 25.6 C               30.3 C
Tsing Yi                     24.7 C               28.5 C
Shek Kong                    24.7 C               30.0 C
Tsuen Wan Ho Koon            23.9 C               27.2 C
Tsuen Wan Shing Mun Valley   24.4 C               28.3 C
Hong Kong Park               24.5 C               27.9 C
Shau Kei Wan                 24.5 C               28.7 C
Kowloon City                 24.8 C               28.9 C
Happy Valley                 24.8 C               29.1 C
Wong Tai Sin                 24.5 C               28.8 C
Stanley                      24.8 C               27.6 C
Kwun Tong                    25.0 C               28.3 C
Sham Shui Po                 25.2 C               29.6 C
Kai Tak Runway Park          25.4 C               29.2 C
Yuen Long Park               24.7 C               30.1 C
Tai Mei Tuk               24.7 C               29.0 C

Duration of sunshine (King's Park):              0.3 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 7.
 

Yesterday's (19 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                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
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 1987-2016, 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 19 Jun
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Jun 2017> 

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