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Bulletin issued at 04:02 HKT 12/Oct/2019

At 4 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 80 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 12 Oct

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 03:45 HKT 12/Oct/2019

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

An anticyclone aloft is bringing mainly fine weather to southeastern China.

At 2 a.m., Severe Typhoon Hagibis was centred about 600 kilometres south-southwest of Tokyo. It is forecast to move north or north-northeast at about 20 kilometres per hour towards Honshu of Japan.

Weather forecast for today

Mainly fine at first. A few showers and isolated thunderstorms later. Temperatures will range between 26 and 30 degrees. Light winds.

Outlook : More showers, windier and slightly cooler early next week. Fine and dry midweek next week.


(The above forecast period is valid up to 23:59 HKT today, 12/10/2019; 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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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 11/Oct/2019

N0 WARNING.

GENERAL SITUATION AT 110900 UTC:
A NORTHEASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 111300 UTC:

HONG KONG= W TO SW 3-4, BEC E TO NE 3-4. ISOL SHOWERS AND TS. TEMP 26-30 C. =
KWANGTUNG= N TO NE 4. ISOL SHOWERS AND TS. SWELL NE 2 M. =
TAIWAN STRAIT= N TO NE 4-5. FINE. SEA UP TO 2 M. SWELL NE 2 M. =
BASHI= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL E 3 M. =
PRATAS= E TO NE 4-5. FINE. SEA UP TO 2 M. SWELL NE 2 M. =
BALINTANG= NE 4-5. FINE. SEA UP TO 2 M. SWELL E 3 M. =
SCARBOROUGH= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL NE 2 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= E TO SE 4. ISOL SHOWERS. =
DANANG= E TO SE 4. ISOL SHOWERS. =
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.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 03:30 HKT 12/Oct/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 12 October 2019

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West to southwest force 3 to 4, becoming east to northeast force 3 to 4.
    Isolated showers and thunderstorms.
    Slight to moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    North to northeast force 4.
    Isolated showers and thunderstorms.
    Moderate seas.

    Shangchuan Dao:
    East to northeast force 4.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6, up to force 7 later. Isolated showers and thunderstorms.

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

    Waglan Island Wind west-southwest force 2
      Visibility 19 Kilometres

    Shantou Wind south-southeast force 1
      Visibility 9 Kilometres

    Huangmaozhou Wind west force 3

    Macau Wind southwest force 2
      Visibility 9 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 19 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 01:30 HKT 12/OCT/2019
    (Next update at 9:00-9:30 HKT 12/OCT/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN ANTICYCLONE ALOFT IS BRINGING MAINLY FINE
     WEATHER TO SOUTHEASTERN CHINA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5-10
       OFFSHORE:  250/5-10                             27-32
   B.   2000 FT:  350/5-10                             25
   C.   5000 FT:  080/5-10                             17
   D.  10000 FT:  080/10                               12
   E.  18000 FT:  340/5                                MS3
   F.  24000 FT:  240/10                               MS15
   G.  30000 FT:  220/20                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE APART FROM ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT.
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT WINDS. MAINLY CLOUDY WITH A FEW SHOWERS
     AND ISOLATED 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.

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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 12/Oct/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.1 C
Minimum Air Temperature                     26.3 C
Grass Minimum Temperature                   25.3 C
Relative Humidity                        60 - 84 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2302.8 mm
Against an average of                     2279.9 mm

Other Stations                Min                  Max
King's Park                  25.9 C               31.4 C
Wong Chuk Hang               24.3 C               31.6 C
Ta Kwu Ling                  22.7 C               33.0 C
Lau Fau Shan                 24.5 C               31.4 C
Tai Po                       24.3 C               31.7 C
Sha Tin                      24.0 C               32.7 C
Tuen Mun                     25.0 C               32.9 C
Tseung Kwan O                23.8 C               31.6 C
Sai Kung                     25.0 C               31.1 C
Cheung Chau                  23.8 C               33.2 C
Chek Lap Kok                 25.6 C               32.4 C
Tsing Yi                     24.7 C               31.5 C
Shek Kong                    23.2 C               32.8 C
Tsuen Wan Ho Koon            23.1 C               30.7 C
Hong Kong Park               25.4 C               31.7 C
Shau Kei Wan                 25.6 C               31.9 C
Kowloon City                 25.3 C               33.3 C
Kwun Tong                    25.6 C               32.5 C
Sham Shui Po                 25.4 C               32.6 C

Duration of sunshine (King's Park):              10.1 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 7.
 

Yesterday's (11 Oct 2019) 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                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
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 11 Oct
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