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Bulletin issued at 09:02 HKT 01/Nov/2019

At 9 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 72 per cent.
During the past hour the mean UV Index recorded at King's Park was 1. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 24 degrees;
Tai Po 26 degrees;
Sha Tin 27 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 25 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 25 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 26 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 26 degrees;
Stanley 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 27 degrees.

Between midnight and 9 a.m. the minimum temperature was 24.0 degrees Celsius at the Hong Kong Observatory.


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


Climatological Information for 1 Nov

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 08:45 HKT 01/Nov/2019

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

The northeast monsoon is affecting southern China.

Weather forecast for today

Sunny periods. The maximum temperature will be about 28 degrees. Moderate to fresh easterly winds, occasionally strong offshore at first.

Outlook : Mainly fine and dry in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 01/11/2019; 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 01/Nov/2019

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 312100 UTC:
THE NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 010100 UTC:

HONG KONG= E TO NE 5-6, OCNL 7. ONE OR TWO RAIN PATCHES. SEA UP TO 4 M. SWELL NE 2 M. TEMP 28-23 C. =
KWANGTUNG= E TO NE 5-6, OCNL 7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 3 M. =
TAIWAN STRAIT= NE 6-7, OCNL 8. ISOL SHOWERS. SEA UP TO 6 M. SWELL NE 3 M. =
BASHI= E TO NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 3 M. =
PRATAS= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 3 M. =
BALINTANG= E TO NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 3 M. =
SCARBOROUGH= NE 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 2 M. =
PARACEL= E TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
TONKIN= NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
DANANG= E 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 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.


  • Map showing the 10 forecast areas
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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 01/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 01 November 2019

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5 to 6, occasionally force 7.
    One or two rain patches.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    Northeast force 6 to 7.
    Rough seas.

    South of Hong Kong:
    East to northeast force 5 to 6, occasionally force 7.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6, up to force 7 in east.

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

    Waglan Island Wind east-northeast force 6
      Visibility 32 Kilometres

    Shantou Wind east force 1
      Visibility 9 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 5

    Macau Wind north-northeast force 2
      Visibility 11 Kilometres

    Xisha Wind east-northeast force 3
      Visibility 18 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 01/NOV/2019
    (Next update at 12:30 HKT 01/NOV/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING SOUTHERN
     CHINA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/10-15
       OFFSHORE:  080/20, OCNL 25                      25-30
   B.   2000 FT:  080/25                               19
   C.   5000 FT:  070/15                               17
   D.  10000 FT:  070/10                               11
   E.  18000 FT:  310/10                               MS6
   F.  24000 FT:  230/10                               MS14
   G.  30000 FT:  230/20                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2500-3700 FT.
   I. WEATHER       : 
      SUNNY PERIODS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS. CLOUDY PERIODS.=

    ===================================================================
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

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    Bulletin issued at 12:30 HKT 31/Oct/2019


    Tropical Cyclone Warning

    Tropical Storm Matmo (1922) has weakened into a Tropical Depression with central pressure 998 hectopascals. At 310300 UTC, it was centred within 90 nautical miles of one three point six degrees north (13.6 N) one zero six point four degrees east (106.4 E) and is forecast to move west at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 30 knots.

    Radius of over 2 metre waves 120 nautical miles.

    No further warnings on this Tropical Depression will be issued by the Hong Kong Observatory unless re-intensification takes place.

    Forecast position and intensity at 010300 UTC
    Dissipated over land.



    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.

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    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/Nov/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.2 C
Minimum Air Temperature                     23.2 C
Grass Minimum Temperature                   21.5 C
Relative Humidity                        57 - 80 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2334.0 mm

Other Stations                Min                  Max
King's Park                  22.6 C               27.1 C
Wong Chuk Hang               23.3 C               27.0 C
Ta Kwu Ling                  18.7 C               28.4 C
Lau Fau Shan                 20.8 C               28.0 C
Tai Po                       21.1 C               26.4 C
Sha Tin                      22.7 C               27.3 C
Tuen Mun                     22.3 C               28.0 C
Tseung Kwan O                21.0 C               26.8 C
Sai Kung                     22.7 C               26.3 C
Cheung Chau                  21.8 C               28.4 C
Chek Lap Kok                 22.9 C               29.1 C
Tsing Yi                     23.3 C               28.2 C
Shek Kong                    20.7 C               28.6 C
Tsuen Wan Ho Koon            20.4 C               27.3 C
Tsuen Wan Shing Mun Valley   21.2 C               27.7 C
Hong Kong Park               22.9 C               28.0 C
Shau Kei Wan                 21.7 C               28.3 C
Kowloon City                 22.1 C               27.1 C
Happy Valley                 23.2 C               27.8 C
Wong Tai Sin                 22.9 C               28.8 C
Stanley                      23.1 C               26.7 C
Kwun Tong                    22.1 C               26.8 C
Sham Shui Po                 22.3 C               29.3 C
Kai Tak Runway Park          22.5 C               26.5 C
Yuen Long Park               21.7 C               28.3 C
Tai Mei Tuk               22.0 C               28.4 C

Duration of sunshine (King's Park):              5.1 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
 

Yesterday's (31 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                         0.12
Sha Tau Kok                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.10
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 31 Oct
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