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Bulletin issued at 21:02 HKT 04/Jun/2018

At 9 p.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 87 per cent.

The tropical cyclone over the central part of the South China Sea has entered within 800 km of Hong Kong. However, its structure is rather loose and it moves relatively slowly, keeping a distance of more than 600 km from Hong Kong tonight and tomorrow morning. It will not pose direct threat to Hong Kong for the time being. The Observatory will closely monitor the evolution of the tropical cyclone.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 27 degrees;
Tai Po 27 degrees;
Sha Tin 27 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 26 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 28 degrees;
Shek Kong 28 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 27 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 26 degrees.

Here is the information on Tropical Depression at 8 p.m.:
Location: 15.9 degrees north, 110.6 degrees east.


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


Climatological Information for 4 Jun

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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

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Bulletin updated at 20:45 HKT 04/Jun/2018

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

Showers are affecting the coast of Guangdong and the northern part of the South China Sea.

At 8 p.m., the tropical depression over the central part of the South China Sea was centred about 210 kilometres west-southwest of Xisha. It is forecast to move north slowly towards the vicinity of Hainan Island.

Weather forecast for tonight and tomorrow

Mainly cloudy with showers and a few squally thunderstorms. Temperatures will range between 26 and 30 degrees. Moderate to fresh east to southeasterly winds, occasionally strong offshore.

Outlook : There will be squally showers and thunderstorms in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 05/06/2018; 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 04/Jun/2018

GALE WARNING AREAS: PARACEL AND DANANG.

GENERAL SITUATION AT 040900 UTC:
FOR DETAILS ON TROPICAL DEPRESSION OVER CENTRAL PART OF THE SOUTH CHINA SEA, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 041300 UTC:

HONG KONG= E TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO SE 2 M. TEMP 27-30 C. =
KWANGTUNG= E TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO SE 2-3 M. =
TAIWAN STRAIT= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SE 2 M. =
BASHI= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO SE 2 M. =
PRATAS= S TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO SE 2-3 M, SW 2 M. =
BALINTANG= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO SE 2 M. =
SCARBOROUGH= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
PARACEL= SE 6, BEC CYCLONIC 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3 M, BEC 4-6 M. SWELL SE 2-3 M, SW 2-3 M. =
TONKIN= N TO NE 5-6, 7 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M, 4 M LATER. SWELL SE 2 M. =
DANANG= CYCLONIC 6, BEC W TO NW 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3 M, BEC 4-6 M. SWELL SE 2-3 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

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    Bulletin issued at 19:30 HKT 04/Jun/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 04 June 2018

    Warnings:
    Strong winds in all areas.

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

    At 7 p.m., the tropical depression over the central part of the South China Sea with maximum sustained winds of about 45 kilometres per hour near its centre was located at 15.9 degrees north, 110.6 degrees east. It is forecast to move north slowly towards the vicinity of Hainan Island.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to southeast force 5 to 6, occasionally force 7.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East to southeast force 5 to 6, occasionally force 7.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    East to southeast force 5 to 6, occasionally force 7.
    Frequent heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 6 to 7. Frequent heavy squally showers and thunderstorms.

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

    Waglan Island Wind east force 5
      Visibility 17 Kilometres

    Shantou Wind east-southeast force 3
      Visibility 30 Kilometres

    Huangmaozhou Wind east-southeast force 5

    Macau Wind east force 3
      Visibility 4200 Metres in showers

    Xisha Wind south-southeast force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 04/JUN/2018
    (Next update at 01:30 HKT 05/JUN/2018)
    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 :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COAST OF
     GUANGDONG.
     AT 4 P.M., THE TROPICAL DEPRESSION OVER THE
     CENTRAL PART OF THE SOUTH CHINA SEA WAS LOCATED
     AT 15.8 DEGREES NORTH, 110.5 DEGREES EAST. IT IS
     FORECAST TO MOVE NORTH SLOWLY TOWARDS THE
     VICINITY OF HAINAN ISLAND.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  120/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  130/20-25                            29-27
   B.   2000 FT:  130/20-25                            22
   C.   5000 FT:  140/20-25                            18
   D.  10000 FT:  160/15                               11
   E.  18000 FT:  170/20                               MS3
   F.  24000 FT:  190/15                               MS13
   G.  30000 FT:  260/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH SQUALLY SHOWERS AND
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3000 FT TEMPO FEW CB 1000 FT
      SCT 2500 FT BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO SOUTHEASTERLY WINDS.
     MAINLY CLOUDY WITH SQUALLY SHOWERS AND
     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 19:00 HKT on 04 Jun 18

    VHHK SIGMET 2 VALID 040700/041100 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2236 E11730 - N2124 E11730 - N2012 E11412 - N2036 E11130 - N2130 E11130 - N2254 E11454 - N2236 E11730 TOP FL450 MOV NW 10KT NC= VHHK SIGMET 3 VALID 041100/041500 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2236 E11730 - N2124 E11730 - N2012 E11412 - N2036 E11130 - N2130 E11130 - N2254 E11454 - N2236 E11730 TOP FL450 MOV NW 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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
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    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 21:30 HKT 04/Jun/2018


    Tropical Cyclone Warning

    At 041200 UTC, Tropical Depression over the central part of South China Sea with central pressure 1000 hectopascals was centred within 90 nautical miles of one six point zero degrees north (16.0 N) one one zero point six degrees east (110.6 E) and is forecast to move north slowly for the next 24 hours.

    Maximum winds near the centre are estimated to be 25 knots.

    Radius of over 2 metre waves 90 nautical miles.

    Forecast position and intensity at 051200 UTC
    One eight point zero degrees north (18.0 N)
    One one zero point seven degrees east (110.7 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 061200 UTC
    One nine point seven degrees north (19.7 N)
    One one zero point six degrees east (110.6 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 071200 UTC
    Two zero point seven degrees north (20.7 N)
    One one zero point two degrees east (110.2 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 081200 UTC
    Two one point eight degrees north (21.8 N)
    One one zero point three degrees east (110.3 E)
    Maximum winds 30 knots.

    Forecast position and intensity at 091200 UTC
    Two two point one degrees north (22.1 N)
    One one one point one degrees east (111.1 E)
    Maximum winds 30 knots.



    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 04/Jun/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.6 C
Minimum Air Temperature                     27.3 C
Grass Minimum Temperature                   26.7 C
Relative Humidity                        62 - 82 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           175.0 mm
Against an average of                      668.3 mm

Other Stations                Min                  Max
King's Park                  26.6 C               32.1 C
Wong Chuk Hang               27.1 C               31.0 C
Ta Kwu Ling                  26.6 C               33.8 C
Lau Fau Shan                 25.3 C               35.4 C
Tai Po                       26.6 C               31.0 C
Sha Tin                      26.7 C               32.3 C
Tuen Mun                     26.2 C               32.3 C
Tseung Kwan O                26.4 C               31.2 C
Sai Kung                     26.5 C               30.3 C
Cheung Chau                  26.4 C               32.3 C
Chek Lap Kok                 27.9 C               33.9 C
Tsing Yi                     27.3 C               32.9 C
Shek Kong                    26.8 C               33.9 C
Tsuen Wan Ho Koon            25.3 C               31.4 C
Tsuen Wan Shing Mun Valley   26.5 C               31.8 C
Hong Kong Park               26.4 C               31.1 C
Shau Kei Wan                 26.3 C               31.0 C
Kowloon City                 26.5 C               33.1 C
Happy Valley                 27.0 C               31.9 C
Wong Tai Sin                 26.1 C               31.1 C
Stanley                      26.7 C               30.3 C
Kwun Tong                    26.0 C               29.8 C
Sham Shui Po                 27.2 C               32.5 C
Kai Tak Runway Park          26.7 C               29.8 C
Yuen Long Park               26.3 C               32.5 C
Tai Mei Tuk               26.3 C               34.0 C

Duration of sunshine (King's Park):              8.3 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):        28.1 C 

Yesterday's (03 Jun 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                           0.09
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.08
King's Park                         0.15
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 in the
past, the hourly mean ambient gamma radiation dose rate may
vary between 0.06 and 0.3 microsievert per hour. (1
microsievert = 0.000001 sievert = 0.001 millisievert)

    2. Temporal variations are generally caused by changes in
meteorological conditions such as rainfall, wind and
barometric pressure.

    3. Spatial variations are generally caused by differences in
the radioactive content of local rock and soil.

    4. The data displayed is provisional. Only limited data
validation has been carried out.
    Climatological Information for 03 Jun
     2003copy right image | Important notices | Privacy policy Last revision date: <04 Jun 2018> 

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