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Bulletin issued at 13:02 HKT 05/Jun/2018

At 1 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 86 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

Please be reminded that:

The Tropical Cyclone Signal No. 1 has been issued.
The Thunderstorm Warning has been issued. It will remain effective until 2:30 p.m. today. A few squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 30 degrees;
Lau Fau Shan 28 degrees;
Tai Po 27 degrees;
Sha Tin 28 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 28 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 27 degrees;
Shek Kong 30 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 28 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 29 degrees;
Stanley 25 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 28 degrees.

Between 11:45 a.m. and 12:45 p.m., lightning was detected within Lantau, New Territories West, Hong Kong and Kowloon. The rainfall recorded in various regions were:

Islands District 1 to 13 mm;
Southern District 0 to 9 mm;
Tsuen Wan 0 to 8 mm;
Central & Western District 1 to 7 mm;
Tuen Mun 0 to 6 mm;
Sai Kung 0 to 3 mm;
Kwai Tsing 0 to 3 mm;
North District 0 to 3 mm;
Sha Tin 0 to 2 mm;
Tai Po 0 to 1 mm;
Yuen Long 0 to 1 mm;
Wong Tai Sin 0 to 1 mm.

Here is the information on Tropical Depression:
Location: 18.1 degrees north, 111.2 degrees east; Maximum sustained wind near its centre: 55 km/h.


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


Climatological Information for 5 Jun

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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

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Bulletin updated at 12:45 HKT 05/Jun/2018

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

Weather forecast for this afternoon and tonight

Mainly cloudy with showers and a few squally thunderstorms. Moderate to fresh east to southeasterly winds. There will be swells.

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


(The above forecast period is valid up to 23:59 HKT today, 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 09:00 HKT 05/Jun/2018

GALE WARNING AREAS: PARACEL AND DANANG.

GENERAL SITUATION AT 042100 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 050100 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 30-26 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= CYCLONIC 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL SE 2-3 M, SW 2-3 M. =
TONKIN= N TO NE 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SE 2 M. =
DANANG= W TO NW 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 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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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 13:15 HKT 05/Jun/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 1:15 p.m. on 05 June 2018

    Warnings:
    Strong winds in all areas.

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

    At 1 p.m., the tropical depression over the northern part of the South China Sea with maximum sustained winds of about 55 kilometres per hour near its centre was located near 18.1 degrees north, 111.2 degrees east. It is forecast to move north at about 12 kilometres per hour 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 south-southeast force 6
      Visibility 1500 Metres

    Shantou Wind east-southeast force 2
      Visibility 6 Kilometres in showers

    Huangmaozhou Wind east-southeast force 4

    Macau Wind east force 2
      Visibility 17 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 6 Kilometres in showers

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • 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 12:30 HKT 05/JUN/2018
    (Next update at 17:30 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 NOON, THE TROPICAL DEPRESSION OVER THE
     CENTRAL PART OF THE SOUTH CHINA SEA WAS LOCATED
     NEAR 17.9 DEGREES NORTH, 111.2 DEGREES EAST. IT
     IS FORECAST TO MOVE NORTH AT ABOUT 6 KNOTS
     TOWARDS THE VICINITY OF HAINAN ISLAND.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  110/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  120/20-25, OCNL 30                   30-27
   B.   2000 FT:  130/20-25, OCNL 30                   23
   C.   5000 FT:  140/20-25                            19
   D.  10000 FT:  160/20                               12
   E.  18000 FT:  180/20                               0
   F.  24000 FT:  190/20                               MS12
   G.  30000 FT:  190/25                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      200-300 FT.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND A FEW SQUALLY
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 2500 FT. 
      TEMPO FEW CB 1000 FT  SCT 2500 FT BKN 4000 FT.
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 11800 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.5-3.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO SOUTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE. 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 11:13 HKT on 05 Jun 18

    VHHK SIGMET 1 VALID 050240/050640 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N2306 AND W OF LINE N2312 E11706 - N1918 E11606 TOP FL450 MOV NNW 15KT NC= VHHK SIGMET 3 VALID 050315/050715 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2312 E11706 - N1918 E11606 - N1642 E11400 - N1930 E11130 - N2130 E11130 - N2318 E11542 - N2312 E11706 TOP FL450 MOV NNW 15KT 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 12:45 HKT 05/Jun/2018

    Tropical Cyclone Warning Bulletin

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

    The Standby Signal, No. 1 is in force.

    At 1 p.m., the tropical depression over the northern part of the South China Sea was estimated to be about 560 kilometres south-southwest of Hong Kong (near 18.1 degrees north 111.2 degrees east) and is forecast to move north at about 12 kilometres per hour towards the vicinity of Hainan Island.
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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
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 12:30 HKT 05/Jun/2018


    Tropical Cyclone Warning

    At 050300 UTC, Tropical Depression over the central part of South China Sea with central pressure 998 hectopascals was centred within 90 nautical miles of one seven point seven degrees north (17.7 N) one one one point two degrees east (111.2 E) and is forecast to move north at about 6 knots 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.

    Forecast position and intensity at 060300 UTC
    One nine point nine degrees north (19.9 N)
    One one one point zero degrees east (111.0 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 070300 UTC
    Two zero point seven degrees north (20.7 N)
    One one zero point five degrees east (110.5 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 080300 UTC
    Two one point five degrees north (21.5 N)
    One one zero point one degrees east (110.1 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 090300 UTC
    Two two point zero degrees north (22.0 N)
    One one zero point seven degrees east (110.7 E)
    Maximum winds 30 knots.

    Forecast position and intensity at 100300 UTC
    Two one point nine degrees north (21.9 N)
    One one one point seven degrees east (111.7 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 05/Jun/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.2 C
Minimum Air Temperature                     26.5 C
Grass Minimum Temperature                   26.3 C
Relative Humidity                        70 - 93 Percent
Rainfall                                    12.4 mm 
Total rainfall since 1st January           187.4 mm
Against an average of                      681.5 mm

Other Stations                Min                  Max
King's Park                  25.9 C               31.0 C
Wong Chuk Hang               26.3 C               30.7 C
Ta Kwu Ling                  27.0 C               33.1 C
Lau Fau Shan                 25.5 C               31.5 C
Tai Po                       26.8 C               29.3 C
Sha Tin                      26.4 C               30.8 C
Tuen Mun                     26.5 C               32.0 C
Tseung Kwan O                25.4 C               29.2 C
Sai Kung                     26.2 C               29.1 C
Cheung Chau                  26.0 C               30.8 C
Chek Lap Kok                 27.3 C               32.5 C
Tsing Yi                     26.2 C               31.6 C
Shek Kong                    26.6 C               31.5 C
Tsuen Wan Ho Koon            25.0 C               31.0 C
Tsuen Wan Shing Mun Valley   26.0 C               30.5 C
Hong Kong Park               25.5 C               29.0 C
Shau Kei Wan                 25.2 C               29.4 C
Kowloon City                 25.5 C               31.2 C
Happy Valley                 26.6 C               30.8 C
Wong Tai Sin                 25.4 C               31.1 C
Stanley                      26.3 C               29.9 C
Kwun Tong                    25.8 C               29.2 C
Sham Shui Po                 26.4 C               31.5 C
Kai Tak Runway Park          26.2 C               29.5 C
Yuen Long Park               25.7 C               31.9 C
Tai Mei Tuk               25.7 C               32.7 C

Duration of sunshine (King's Park):              2.1 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 9.
Sea surface temperature (Waglan Island):        28.2 C 

Yesterday's (04 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 04 Jun
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