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Bulletin issued at 11:31 HKT 08/Jun/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 93 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.4. The intensity of UV radiation was low.

Gusts reaching 100 kilometres per hour or above may affect Hong Kong.

Please be reminded that:

The Tropical Cyclone Signal No. 3 has been issued.
The Red Rainstorm Warning Signal was issued at 11:30 a.m.
The Thunderstorm Warning has been issued. It will remain effective until 1:00 p.m. today. Squally thunderstorms are expected to occur over Hong Kong.
The Landslip Warning has been issued.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 25 degrees;
Tai Po 25 degrees;
Sha Tin 25 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 25 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 25 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 24 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 25 degrees.

Between 9:45 and 10:45 a.m., lightning was detected within New Territories East, Hong Kong and Kowloon. The rainfall recorded in various regions were:

Tai Po 5 to 49 mm;
Kwun Tong 34 to 47 mm;
Eastern District 24 to 45 mm;
Sai Kung 8 to 44 mm;
Southern District 10 to 39 mm;
Sha Tin 9 to 38 mm;
North District 1 to 32 mm;
Kowloon City 13 to 22 mm;
Wong Tai Sin 18 to 22 mm;
Islands District 0 to 21 mm;
Wan Chai 19 to 21 mm;
Central & Western District 10 to 19 mm;
Yau Tsim Mong 12 to 14 mm;
Sham Shui Po 10 to 12 mm;
Tsuen Wan 1 to 11 mm;
Kwai Tsing 4 to 9 mm;
Yuen Long 0 to 5 mm;
Tuen Mun 1 to 3 mm.

Here is the information on Tropical Storm Ewiniar:
Location: 22.9 degrees north, 112.2 degrees east; Maximum sustained wind near its centre: 65 km/h.


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


Climatological Information for 8 Jun

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Bulletin updated at 10:45 HKT 08/Jun/2018

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

Weather forecast for today

Fresh to strong south to southeasterly winds, occasionally gale on high ground at first. Cloudy to overcast with squally showers and thunderstorms. Showers will be heavy at times. There will be swells.

Outlook : Still a few showers over the weekend.


(The above forecast period is valid up to 23:59 HKT today, 08/06/2018; 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 09:00 HKT 08/Jun/2018

GALE WARNING AREA: KWANGTUNG.

GENERAL SITUATION AT 072100 UTC:
FOR DETAILS ON TROPICAL STORM EWINIAR (1804), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 080100 UTC:

HONG KONG= S TO SE 5-6, OCNL 7. DOWN TO 1000 M IN SCT SQUALLY HEAVY SHOWERS AND TS. SEA 2-4 M. SWELL S TO SW 2 M. TEMP 29-27 C. =
KWANGTUNG= S TO SW 5-6, 7-8 IN W AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 2-4 M, UP TO 6 M IN W. SWELL S TO SW 2-3 M. =
TAIWAN STRAIT= E TO NE 5-6. 4000 M IN ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW UP TO 2 M. =
BASHI= E TO NE 4-5, 6 IN E. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL S TO SW 2 M, E TO SE 2 M LATER. =
PRATAS= S TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
BALINTANG= E TO NE 4-5, 6 IN E. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL S TO SW 2 M, E TO SE 2 M LATER. =
SCARBOROUGH= S TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
PARACEL= W TO SW 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL S TO SW 2-3 M. =
TONKIN= W TO NW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
DANANG= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 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.


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    • SOUTH CHINA COASTAL WATERS
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    Bulletin issued at 09:30 HKT 08/Jun/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 08 June 2018

    Warnings:
    Gale force winds in Shangchuan Dao. Strong winds in Hong Kong adjacent waters, Nan'ao, Shanwei and south of Hong Kong.

    Weather Situation:
    At 9 a.m., Tropical Storm Ewiniar with maximum sustained winds of about 65 kilometres per hour near its centre was located near 22.8 degrees north, 112.2 degrees east. It is forecast to move north or north-northeast slowly towards the inland areas of western Guangdong and weaken gradually. Tropical Depression Maliksi has intensified into a tropical storm. Meanwhile, Maliksi with maximum sustained winds of about 65 kilometres per hour near its centre was located near 17.8 degrees north, 127.8 degrees east. It is forecast to move north at about 20 kilometres per hour across the western North Pacific.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southeast force 5 to 6, occasionally force 7 at first.
    Scattered squally showers and thunderstorms. Showers will be heavy at times.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    East to southeast force 5 to 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong:
    South to southeast force 5 to 6, occasionally force 7.
    Frequent heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    South to southwest force 7 to 8.
    Frequent heavy squally showers and thunderstorms.
    Rough to very rough seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 6. Frequent heavy squally showers and thunderstorms.

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

    Shantou Wind east-northeast force 2
      Visibility 28 Kilometres

    Huangmaozhou Wind south-southwest force 5

    Macau Wind south-southeast force 4
      Visibility 5000 Metres

    Xisha Wind southwest force 2
      Visibility 22 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 09:30 HKT 08/JUN/2018
    (Next update at 12:30 HKT 08/JUN/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     GALE FORCE WINDS ON HIGH GROUND.
     STRONG WINDS, SEV TURB AND SEV GUSTS. 
     CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 9 A.M., TROPICAL STORM EWINIAR WAS LOCATED
     NEAR 22.8 DEGREES NORTH, 112.2 DEGREES EAST. IT
     IS FORECAST TO MOVE NORTH OR NORTH-NORTHEAST
     SLOWLY TOWARDS THE INLAND AREAS OF WESTERN
     GUANGDONG AND WEAKEN GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  150/15-20G30
                  TEMPO VRB/25G35 IN TS
       OFFSHORE:  160/25-30G40                         25-29
   B.   2000 FT:  160/30-35G45                         23
   C.   5000 FT:  180/25-30                            19
   D.  10000 FT:  190/30                               11
   E.  18000 FT:  200/30                               MS2
   F.  24000 FT:  210/30                               MS11
   G.  30000 FT:  210/25                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH SQUALLY SHOWERS AND THUNDERSTORMS.
      SHOWERS WILL BE HEAVY AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT.  
      TEMPO FEW CB 800 FT  SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 2500 M IN SHOWERS. 
                      TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 3.0-5.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG SOUTHEASTERLY WINDS,
     OCCASIONALLY GALE FORCE WINDS OFFSHORE AND ON
     HIGH GROUND AT FIRST.  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 10:55 HKT on 08 Jun 18

    VHHK SIGMET 1 VALID 080255/080655 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2336 E11730 - N2136 E11730 - N1942 E11218 - N2200 E11330 - N2212 E11312 - N2348 E11706 - N2336 E11730 TOP FL450 MOV N 10KT NC= VHHK SIGMET 12 VALID 072320/080320 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2130 E11730 - N2012 E11500 - N1842 E11212 - N1918 E11136 - N2142 E11154 - N2242 E11430 - N2330 E11730 - N2130 E11730 TOP FL440 MOV N 10KT NC=

    Please click here for more about the SIGMET

    TROPICAL CYCLONE WARNING Skip to main content
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    Tropical Cyclone Warnings

    Bulletin issued at 10:45 HKT 08/Jun/2018

    Tropical Cyclone Warning Bulletin

    Here is the latest Tropical Cyclone Warning Bulletin issued by the Hong Kong Observatory.

    The Strong Wind Signal, No. 3 is in force.

    This means that winds with mean speeds of 41 to 62 kilometres per hour are expected.

    At 11 a.m., Tropical Storm Ewiniar was estimated to be about 210 kilometres west-northwest of Hong Kong (near 22.9 degrees north 112.2 degrees east) and is forecast to move north or north-northeast slowly towards the inland areas of western Guangdong and weaken gradually.
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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

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    Bulletin issued at 09:30 HKT 08/Jun/2018


    Tropical Cyclone Warning

    At 080000 UTC, Tropical Storm Ewiniar (1804) with central pressure 995 hectopascals was centred within 90 nautical miles of two two point seven degrees north (22.7 N) one one two point two degrees east (112.2 E) and is forecast to move north or north-northeast slowly for the next 24 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 30 nautical miles.
    Radius of over 2 metre waves 120 nautical miles.

    Forecast position and intensity at 090000 UTC
    Two three point six degrees north (23.6 N)
    One one two point three degrees east (112.3 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 100000 UTC
    Dissipated over land.



    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 08/Jun/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.6 C
Minimum Air Temperature                     26.0 C
Grass Minimum Temperature                   25.6 C
Relative Humidity                        86 - 97 Percent
Rainfall                                    47.4 mm 
Total rainfall since 1st January           321.3 mm
Against an average of                      729.3 mm

Other Stations                Min                  Max
King's Park                  25.5 C               28.2 C
Wong Chuk Hang               25.6 C               28.8 C
Ta Kwu Ling                  25.8 C               29.2 C
Lau Fau Shan                 23.8 C               27.7 C
Tai Po                       25.3 C               28.1 C
Sha Tin                      25.6 C               29.3 C
Tuen Mun                     24.9 C               27.5 C
Tseung Kwan O                25.7 C               28.1 C
Sai Kung                     26.1 C               28.5 C
Cheung Chau                  24.9 C               27.0 C
Chek Lap Kok                 25.1 C               29.4 C
Tsing Yi                     25.7 C               29.0 C
Shek Kong                    25.1 C               29.1 C
Tsuen Wan Ho Koon            24.6 C               26.0 C
Tsuen Wan Shing Mun Valley   25.3 C               27.8 C
Hong Kong Park               25.3 C               28.6 C
Shau Kei Wan                 24.7 C               28.3 C
Kowloon City                 25.1 C               28.0 C
Happy Valley                 26.2 C               29.6 C
Wong Tai Sin                 25.3 C               28.5 C
Stanley                      25.4 C               28.7 C
Kwun Tong                    25.8 C               28.5 C
Sham Shui Po                 25.8 C               28.7 C
Kai Tak Runway Park          25.6 C               28.6 C
Yuen Long Park               24.2 C               28.3 C
Tai Mei Tuk               25.5 C               27.3 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
 

Yesterday's (07 Jun 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.09
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                           0.13
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.13

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 07 Jun
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