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Bulletin issued at 11:02 HKT 03/Oct/2019

At 11 a.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 59 per cent.
During the past hour the mean UV Index recorded at King's Park was 7. The intensity of UV radiation was high.

Hot weather might cause adverse health effects. The Observatory advises the public to stay on the alert.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang 30 degrees;
Ta Kwu Ling 31 degrees;
Lau Fau Shan 29 degrees;
Tai Po 30 degrees;
Sha Tin 32 degrees;
Tuen Mun 32 degrees;
Tseung Kwan O 32 degrees;
Sai Kung 32 degrees;
Cheung Chau 30 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 29 degrees;
Shek Kong 31 degrees;
Tsuen Wan Ho Koon 29 degrees;
Tsuen Wan Shing Mun Valley 32 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 31 degrees;
Kowloon City 32 degrees;
Happy Valley 33 degrees;
Wong Tai Sin 32 degrees;
Stanley 30 degrees;
Kwun Tong 32 degrees;
Sham Shui Po 33 degrees;
Kai Tak Runway Park 32 degrees;
Yuen Long Park 31 degrees;
Tai Mei Tuk 34 degrees.


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


Climatological Information for 3 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 10:45 HKT 03/Oct/2019

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

An anticyclone aloft is bringing fine weather to southern China.

Weather forecast for today

Mainly fine and hot. Light to moderate west to southwesterly winds.

Outlook : Mainly fine and hot in the next couple of days. It will be slightly cooler, windier with some showers early next week.


(The above forecast period is valid up to 23:59 HKT today, 03/10/2019; 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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Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 03/Oct/2019

N0 WARNING.

GENERAL SITUATION AT 022100 UTC:
A SOUTHWESTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 030100 UTC:

HONG KONG= W TO SW 4. FINE. TEMP 32-28 C. =
KWANGTUNG= SW 4, OCNL 5. FINE. SEA UP TO 2 M. =
TAIWAN STRAIT= S TO SW 4-5. FINE. SEA UP TO 2 M. =
BASHI= W TO SW 4-5, E TO NE 4-5 LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PRATAS= W TO SW 4-5. FINE. SEA UP TO 2 M. =
BALINTANG= W TO SW 4-5, E TO NE 4-5 LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
SCARBOROUGH= S TO SW 4-5, N TO NE 4-5 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S TO SE 4-5. FINE. SEA 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 09:30 HKT 03/Oct/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 03 October 2019

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West to southwest force 4.
    Moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    West to southwest force 4, occasionally force 5.
    Moderate seas.

    Shangchuan Dao:
    South to southwest force 4, occasionally force 5.
    Moderate seas.

    Outlook for the next 48 hours
    West to southwesterly winds of force 4 to 5, becoming easterly winds of force 5 to 6 later.

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

    Waglan Island Wind west force 3
      Visibility 26 Kilometres

    Shantou Wind west force 2
      Visibility 8 Kilometres

    Huangmaozhou Wind west force 2

    Macau Wind west force 1
      Visibility 11 Kilometres

    Xisha Wind south-southwest force 1
      Visibility 30 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 03/OCT/2019
    (Next update at 12:30 HKT 03/OCT/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
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 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  230/5-10
       OFFSHORE:  230/10                               28-33
   B.   2000 FT:  230/10                               22
   C.   5000 FT:  190/5-10                             17
   D.  10000 FT:  160/15                               10
   E.  18000 FT:  040/10                               MS3
   F.  24000 FT:  090/10                               MS15
   G.  30000 FT:  320/10                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT.
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : NIL.
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHWESTERLY WINDS. MAINLY
     FINE.=

    ===================================================================
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.

    There is no Significant Weather Information (SIGMET)

    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 03/Oct/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.1 C
Minimum Air Temperature                     27.9 C
Grass Minimum Temperature                   25.6 C
Relative Humidity                        59 - 82 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2233.2 mm
Against an average of                     2240.3 mm

Other Stations                Min                  Max
King's Park                  27.2 C               31.9 C
Wong Chuk Hang               25.5 C               31.0 C
Ta Kwu Ling                  21.9 C               34.5 C
Lau Fau Shan                 26.3 C               32.0 C
Tai Po                       24.5 C               33.5 C
Sha Tin                      26.2 C               33.8 C
Tuen Mun                     26.5 C               33.2 C
Tseung Kwan O                25.9 C               34.4 C
Sai Kung                     25.8 C               33.7 C
Chek Lap Kok                 27.6 C               33.6 C
Tsing Yi                     25.3 C               32.4 C
Shek Kong                    23.7 C               33.9 C
Tsuen Wan Ho Koon            23.6 C               31.6 C
Tsuen Wan Shing Mun Valley   24.3 C               33.7 C
Hong Kong Park               26.6 C               31.5 C
Shau Kei Wan                 27.0 C               33.7 C
Kowloon City                 26.8 C               34.3 C
Happy Valley                 26.7 C               33.4 C
Wong Tai Sin                 27.1 C               33.8 C
Stanley                      27.1 C               31.6 C
Kwun Tong                    27.1 C               33.7 C
Sham Shui Po                 27.1 C               33.2 C
Kai Tak Runway Park          26.6 C               34.0 C
Yuen Long Park               25.1 C               35.1 C
Tai Mei Tuk               25.6 C               36.3 C

Duration of sunshine (King's Park):              10.6 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
 

Yesterday's (02 Oct 2019) 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                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.10
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                        0.15

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 02 Oct
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