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Bulletin issued at 06:02 HKT 09/Jun/2018

At 6 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 88 per cent.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 26 degrees;
Tai Po 26 degrees;
Sha Tin 26 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 26 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 26 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 26 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 26 degrees;
Stanley 26 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 26 degrees.

Between 4:45 and 5:45 a.m., lightning was detected within New Territories East, Hong Kong and Kowloon. The rainfall recorded in various regions were:

Sai Kung 0 to 1 mm;
Southern District 0 to 1 mm;
Tai Po 0 to 1 mm.


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


Climatological Information for 9 Jun

Regional Weather in Hong Kong

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Bulletin updated at 06:00 HKT 09/Jun/2018

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

The rainbands associated with Tropical Depression Ewiniar are affecting Guangdong and the northern part of the South China Sea. Locally, more than 10 millimetres of rainfall were recorded over many places.

At 5 a.m., Tropical Depression Ewiniar was centred about 40 kilometres northwest of Guangzhou. It is forecast to move northeast slowly, continue to move towards the inland areas of Guangdong and weaken gradually. Meanwhile, Tropical Storm Maliksi was centred about 950 kilometres northeast of Manila. It is forecast to move north-northeast at about 20 kilometres per hour across the western North Pacific.

Weather forecast for today

Mainly cloudy with one or two showers. Sunny intervals during the day. The maximum temperature will be around 31 degrees. Moderate to fresh south to southwesterly winds.

Outlook : Hot with sunny periods and a few showers early next week.


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

N0 WARNING.

GENERAL SITUATION AT 080900 UTC:
FOR DETAILS ON TROPICAL DEPRESSION EWINIAR (1804), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 081300 UTC:

HONG KONG= S TO SW 5, 6 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M, 3 M AT FIRST. SWELL S TO SW 2 M. TEMP 27-31 C. =
KWANGTUNG= SW 5, 6 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M, 3 M AT FIRST. SWELL S TO SW 2-3 M. =
TAIWAN STRAIT= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW UP TO 2 M. =
BASHI= W TO NW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E 2 M. =
PRATAS= SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
BALINTANG= W TO NW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E 2 M. =
SCARBOROUGH= SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S TO SW 2-3 M. =
PARACEL= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
TONKIN= SW 5, 6 AT FIRST. ISOL SHOWERS. SEA 2 M, 3 M AT FIRST. SWELL SW 2 M. =
DANANG= SW 5, 6 AT FIRST. ISOL SHOWERS. SEA 2 M, 3 M AT FIRST. 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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    South China Coastal Waters

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    Bulletin issued at 05:30 HKT 09/Jun/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 09 June 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    At 5 a.m., Tropical Depression Ewiniar with maximum sustained winds of about 45 kilometres per hour near its centre was located near 23.4 degrees north, 113.0 degrees east. It is forecast to move northeast slowly, continue to move towards the inland areas of Guangdong and weaken gradually. Meanwhile, Tropical Storm Maliksi with maximum sustained winds of about 65 kilometres per hour near its centre was located near 20.6 degrees north, 127.3 degrees east. It is forecast to move north-northeast at about 20 kilometres per hour across the western North Pacific.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southwest force 5, force 6 at first.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

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

    Shangchuan Dao:
    Southwest force 5, force 6 at first.
    Moderate to rough seas.

    Outlook for the next 48 hours
    West to southwesterly winds of force 5 to 6. Scattered squally showers and thunderstorms.

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

    Shantou Wind east force 1
      Visibility 23 Kilometres

    Huangmaozhou Wind west-southwest force 5

    Macau Wind south-southwest force 2
      Visibility 6 Kilometres

    Xisha Wind west-southwest force 3
      Visibility 30 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 09/JUN/2018
    (Next update at 9:00-9:30 HKT 09/JUN/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 11 P.M. LAST NIGHT, TROPICAL DEPRESSION
     EWINIAR WAS LOCATED NEAR 23.4 DEGREES NORTH,
     112.6 DEGREES EAST. IT IS FORECAST TO MOVE NORTH
     OR NORTH-NORTHEAST SLOWLY TOWARDS THE INLAND
     AREAS OF GUANGDONG AND WEAKEN GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  180/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  180/20                               26-31
   B.   2000 FT:  170/20                               22
   C.   5000 FT:  210/20                               20
   D.  10000 FT:  210/30                               13
   E.  18000 FT:  240/20                               MS2
   F.  24000 FT:  240/20                               MS12
   G.  30000 FT:  270/20                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS AND
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT TEMPO FEW CB 800 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM. TEMPO 3000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH SOUTH TO SOUTHWESTERLY WINDS.
     MAINLY CLOUDY WITH A FEW 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 18:50 HKT on 08 Jun 18

    VHHK SIGMET 5 VALID 082105/090100 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2200 E11248 - N2230 E11342 - N2330 E11706 - N2130 E11700 - N2118 E11248 - N2200 E11248 TOP FL420 MOV NE 10KT WKN=

    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

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    Bulletin issued at 18:30 HKT 08/Jun/2018


    Tropical Cyclone Warning

    At 080900 UTC, Tropical Depression Ewiniar (1804) with central pressure 996 hectopascals was centred within 90 nautical miles of two three point three degrees north (23.3 N) one one two point five degrees east (112.5 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 30 knots.

    Radius of over 2 metre waves 90 nautical miles.

    No further warnings on this Tropical Depression will be issued by the Hong Kong Observatory unless re-intensification takes place.

    Forecast position and intensity at 090900 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 09/Jun/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.2 C
Minimum Air Temperature                     25.3 C
Grass Minimum Temperature                   25.6 C
Relative Humidity                        79 - 96 Percent
Rainfall                                    70.2 mm 
Total rainfall since 1st January           391.5 mm
Against an average of                      741.8 mm

Other Stations                Min                  Max
King's Park                  24.7 C               29.2 C
Wong Chuk Hang               24.6 C               28.4 C
Ta Kwu Ling                  25.3 C               29.2 C
Lau Fau Shan                 24.4 C               27.9 C
Tai Po                       25.0 C               28.7 C
Sha Tin                      24.9 C               29.4 C
Tuen Mun                     24.9 C               28.4 C
Tseung Kwan O                24.6 C               27.8 C
Sai Kung                     24.8 C               28.5 C
Cheung Chau                  24.8 C               27.4 C
Chek Lap Kok                 25.3 C               29.7 C
Tsing Yi                     25.1 C               29.0 C
Shek Kong                    25.6 C               29.9 C
Tsuen Wan Ho Koon            24.3 C               26.8 C
Tsuen Wan Shing Mun Valley   24.9 C               28.1 C
Hong Kong Park               24.1 C               28.4 C
Shau Kei Wan                 24.1 C               29.0 C
Kowloon City                 24.3 C               28.6 C
Happy Valley                 24.6 C               29.3 C
Wong Tai Sin                 24.4 C               28.7 C
Stanley                      24.4 C               28.4 C
Kwun Tong                    24.4 C               28.9 C
Sham Shui Po                 24.9 C               28.8 C
Kai Tak Runway Park          24.7 C               29.2 C
Yuen Long Park               24.9 C               29.2 C
Tai Mei Tuk               24.5 C               27.8 C

Duration of sunshine (King's Park):              0.7 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 6.
 

Yesterday's (08 Jun 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.14
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 08 Jun
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