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Bulletin issued at 15:02 HKT 01/Jul/2018

At 3 p.m. at the Hong Kong Observatory the air temperature was 31 degrees Celsius and the relative humidity 74 per cent.
During the past hour the mean UV Index recorded at King's Park was 7. The intensity of UV radiation was high.

Gusts reaching 90 kilometres per hour or above may affect Hong Kong.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 4:00 p.m. today. A few squally thunderstorms are expected to occur over Hong Kong.
The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

King's Park 31 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 31 degrees;
Lau Fau Shan 27 degrees;
Tai Po 31 degrees;
Sha Tin 27 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 34 degrees;
Sai Kung 34 degrees;
Cheung Chau 31 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 27 degrees;
Shek Kong 32 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 33 degrees;
Kowloon City 30 degrees;
Happy Valley 32 degrees;
Wong Tai Sin 31 degrees;
Stanley 32 degrees;
Kwun Tong 32 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 32 degrees;
Yuen Long Park 31 degrees;
Tai Mei Tuk 32 degrees.

Between 1:45 and 2:45 p.m., lightning was detected within New Territories East and New Territories West. The rainfall recorded in various regions were:

Tsuen Wan 0 to 12 mm;
Kwai Tsing 0 to 7 mm;
Sha Tin 0 to 6 mm;
Tai Po 0 to 2 mm;
Islands District 0 to 1 mm;
Yuen Long 0 to 1 mm.


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


Climatological Information for 1 Jul

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 15:25 HKT 01/Jul/2018

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

An area of thundery showers is affecting the vicinity of the Pearl River Estuary.

At noon, Severe Tropical Storm Prapiroon was centred about 260 kilometres south-southwest of Okinawa. It is forecast to move north at about 22 kilometres per hour towards the vicinity of the Ryukyu Islands and intensify gradually.

Weather forecast for this afternoon and tonight

Mainly cloudy with a few showers and squally thunderstorms. Very hot at first. Moderate to fresh southwesterly winds.

Outlook : A few showers and isolated thunderstorms in the next couple of days. Sunny periods in the middle and latter parts of this week.


(The above forecast period is valid up to 23:59 HKT today, 01/07/2018; 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 01/Jul/2018

GALE WARNING AREA: BASHI.

GENERAL SITUATION AT 302100 UTC:
A SOUTHWESTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS. SEVERE TROPICAL STORM PRAPIROON (1807) 984 HPA 23N 128E NNW 12 KT INTSF.

MARINE FORECAST FOR 24 HOURS FROM 010100 UTC:

HONG KONG= SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. TEMP 33-27 C. =
KWANGTUNG= S TO SW 5-6, UP TO 7 IN W. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S 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 NE 2-3 M. =
BASHI= W TO NW 6-7, SW UP TO 8 LATER. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL E TO NE 2-3 M. =
PRATAS= SW 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E 2 M. =
BALINTANG= W TO SW 6-7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL E TO NE 2-3 M. =
SCARBOROUGH= W TO SW 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 2-3 M. =
PARACEL= S TO SW 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL S UP TO 2 M. =
TONKIN= S TO SW 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL S UP TO 2 M. =
DANANG= S TO SW 6-7. ISOL SHOWERS AND TS. SEA 3-4 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.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 12:30 HKT 01/Jul/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 01 July 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    A southwesterly airstream is affecting the south China coastal waters.

    At noon, Severe Tropical Storm Prapiroon with maximum sustained winds of about 90 kilometres per hour near its centre was located near 23.9 degrees north, 127.0 degrees east. It is forecast to move north at about 22 kilometres per hour towards the vicinity of the Ryukyu Islands and intensify gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southwest force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    Southwest force 5 to 6, becoming force 7 later.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    South to southwest force 6 to 7.
    Isolated squally showers and thunderstorms.
    Rough seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 6 to 7. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind southwest force 4
      Visibility 28 Kilometres

    Shantou Wind west-southwest force 2
      Visibility 28 Kilometres

    Huangmaozhou Wind southwest force 3

    Macau Wind south force 2
      Visibility 19 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 13 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 12:30 HKT 01/JUL/2018
    (Next update at 17:30 HKT 01/JUL/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  220/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  220/15-20                            34-27
   B.   2000 FT:  230/15-20                            24
   C.   5000 FT:  240/20                               20
   D.  10000 FT:  230/15                               12
   E.  18000 FT:  040/5                                MS2
   F.  24000 FT:  040/15                               MS12
   G.  30000 FT:  040/10                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY PERIODS WITH A FEW SHOWERS. ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT. TEMPO FEW CB 800 FT SCT 1200 FT
      BKN 6000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH SOUTHWESTERLY WINDS. CLOUDY
     PERIODS WITH ISOLATED 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 15:00 HKT on 01 Jul 18

    VHHK SIGMET 1 VALID 010505/010905 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2142 E11442 - N2142 E11312 - N2212 E11312 - N2248 E11442 - N2142 E11442 TOP FL400 MOV E 10KT NC= VHHK SIGMET 2 VALID 010700/011100 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2200 E11600 - N2100 E11300 - N2230 E11400 - N2245 E11500 - N2230 E11600 - N2200 E11600 TOP FL400 MOV E 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 01/Jul/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.8 C
Minimum Air Temperature                     28.9 C
Grass Minimum Temperature                   27.4 C
Relative Humidity                        65 - 85 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           633.8 mm
Against an average of                     1096.9 mm

Other Stations                Min                  Max
King's Park                  28.4 C               33.1 C
Wong Chuk Hang               28.2 C               31.1 C
Ta Kwu Ling                  25.4 C               34.1 C
Lau Fau Shan                 27.7 C               33.9 C
Tai Po                       27.2 C               32.2 C
Sha Tin                      28.6 C               33.1 C
Tuen Mun                     28.5 C               32.3 C
Tseung Kwan O                28.0 C               34.4 C
Sai Kung                     28.8 C               34.9 C
Cheung Chau                  27.8 C               32.7 C
Chek Lap Kok                 29.0 C               34.4 C
Tsing Yi                     28.4 C               31.9 C
Shek Kong                    26.9 C               34.1 C
Tsuen Wan Ho Koon            26.3 C               30.5 C
Tsuen Wan Shing Mun Valley   27.8 C               31.3 C
Hong Kong Park               28.6 C               31.2 C
Shau Kei Wan                 27.0 C               32.4 C
Kowloon City                 27.7 C               33.2 C
Happy Valley                 29.1 C               32.2 C
Wong Tai Sin                 28.1 C               33.1 C
Stanley                      28.5 C               30.8 C
Kwun Tong                    28.6 C               32.8 C
Sham Shui Po                 28.4 C               32.4 C
Kai Tak Runway Park          28.8 C               32.4 C
Yuen Long Park               27.8 C               34.5 C
Tai Mei Tuk               27.2 C               34.0 C

Duration of sunshine (King's Park):              9.7 H
The mean UV index recorded at King's Park yesterday was 6,
the UV intensity was High.
The maximum UV index for yesterday was 11.
Sea surface temperature (Waglan Island):        27.2 C 

Yesterday's (30 Jun 2018) 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                           0.09
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.08
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 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 30 Jun
     2003copy right image | Important notices | Privacy policy Last revision date: <01 Jul 2018> 

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