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Bulletin issued at 16:02 HKT 12/Oct/2019

At 4 p.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.5. The intensity of UV radiation was low.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 7:00 p.m. today. Isolated thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 31 degrees;
Lau Fau Shan 31 degrees;
Tai Po 30 degrees;
Sha Tin 29 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 30 degrees;
Cheung Chau 31 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 28 degrees;
Shek Kong 30 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 26 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 28 degrees;
Stanley 30 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 28 degrees;
Yuen Long Park 31 degrees;
Tai Mei Tuk 30 degrees.

Between 2:45 and 3:45 p.m., lightning was detected over all regions. The rainfall recorded in various regions were:

Sham Shui Po 4 to 30 mm;
Central & Western District 0 to 26 mm;
Sha Tin 0 to 20 mm;
Kowloon City 0 to 14 mm;
Tsuen Wan 0 to 5 mm;
Yau Tsim Mong 0 to 2 mm;
Kwai Tsing 0 to 2 mm;
Tai Po 0 to 1 mm.


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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Bulletin updated at 16:35 HKT 12/Oct/2019

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

Thundery showers triggered by high temperatures are affecting the coast of Guangdong. Locally, about 20 millimetres of rainfall were recorded over the central part of Kowloon and the western part of Hong Kong Island in the afternoon. Besides, a cold front has formed over the northern part of southern China, and is moving southwards gradually.

At 4 p.m., Severe Typhoon Hagibis was centred about 160 kilometres southwest of Tokyo. It is forecast to move northeast at about 40 kilometres per hour towards Honshu of Japan.

Weather forecast for tonight and tomorrow

Cloudy with a few showers and isolated thunderstorms. More showers and slightly cooler tomorrow. Temperatures will range between 24 and 28 degrees. Light winds, becoming moderate northeasterlies tomorrow, occasionally fresh offshore.

Outlook : There will still be showers and it will be slightly cooler on Monday. Fine, dry and windy midweek next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 13/10/2019; 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 09:00 HKT 12/Oct/2019

N0 WARNING.

GENERAL SITUATION AT 112100 UTC:
A NORTHEASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 120100 UTC:

HONG KONG= E TO NE 3-4. ISOL SHOWERS AND TS. TEMP 31-24 C. =
KWANGTUNG= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 5-6. ISOL SHOWERS. SEA 2-3 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. ISOL SHOWERS. SEA UP TO 2 M. SWELL NE 2 M. =
BALINTANG= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL E 3 M. =
SCARBOROUGH= NE 4-5. FINE. 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. FINE. =
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 16:30 HKT 12/Oct/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 12 October 2019

    Warnings:
    Strong winds in Nan'ao and Shanwei.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 3 to 4.
    Isolated showers and thunderstorms.
    Slight to moderate seas.

    Nan'ao and Shanwei:
    East to northeast force 4 to 5, force 6 later.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    East to northeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7, becoming up to force 8 in east. Isolated showers and thunderstorms.

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

    Waglan Island Wind south-southeast force 2
      Visibility 18 Kilometres

    Shantou Wind southeast force 2
      Visibility 17 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind south force 1

    Macau Wind east force 2
      Visibility 9 Kilometres

    Xisha Wind north-northeast force 2
      Visibility 20 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 12:30 HKT 12/OCT/2019
    (Next update at 17:30 HKT 12/OCT/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     WINDS ARE WEAK OVER THE COAST OF GUANGDONG.
     MEANWHILE, SHOWERS ARE AFFECTING THE REGION.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  250/5-10                             33-25
   B.   2000 FT:  030/10                               23
   C.   5000 FT:  070/10                               18
   D.  10000 FT:  080/10                               10
   E.  18000 FT:  020/10                               MS4
   F.  24000 FT:  010/15                               MS15
   G.  30000 FT:  360/20                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY. ISOLATED SHOWERS AND
      THUNDERSTORMS. SUNNY INTERVALS IN THE AFTERNOON.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT SCT 3500 FT.
      TEMPO FEW 1000 FT SCT CB 2000 FT BKN 4000 FT
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHEASTERLY WINDS.
     CLOUDY WITH 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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