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Bulletin issued at 16:02 HKT 21/Oct/2019

At 4 p.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 67 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 27 degrees;
Tai Po 26 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 26 degrees;
Tsing Yi 27 degrees;
Shek Kong 28 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 25 degrees;
Kowloon City 26 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 25 degrees;
Stanley 27 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 26 degrees.


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


Climatological Information for 21 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 16:15 HKT 21/Oct/2019

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

A dry northeast monsoon is bringing generally fine weather to southern China.

At 4 p.m., Severe Tropical Storm Neoguri was centred about 390 kilometres south-southwest of Osaka. It is forecast to move northeast at about 35 kilometres per hour in the general direction of Honshu of Japan.

Weather forecast for tonight and tomorrow

Mainly fine. The minimum temperature will be about 24 degrees in the urban areas tomorrow morning, and a couple of degrees lower in the New Territories. Dry during the day with a maximum temperature of around 29 degrees. Moderate easterly winds.

Outlook : Cloudier with one or two showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 22/10/2019; 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 21/Oct/2019

N0 WARNING.

GENERAL SITUATION AT 202100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= E 4-5. FINE. SEA UP TO 2 M. SWELL NE 2 M. TEMP 29-25 C. =
KWANGTUNG= E TO NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 5-6. FINE. SEA 2-3 M. SWELL NE 2-3 M. =
BASHI= E TO NE 4-5. RAIN PATCHES. SEA UP TO 2 M. SWELL NE 2-3 M. =
PRATAS= NE 4-5, OCNL 6. RAIN PATCHES. SEA UP TO 3 M. SWELL NE 2-3 M. =
BALINTANG= E TO NE 4-5. RAIN PATCHES. SEA UP TO 2 M. SWELL NE 2-3 M. =
SCARBOROUGH= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL NE 2-3 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL NE 2 M. =
TONKIN= E TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 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.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 16:30 HKT 21/Oct/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 21 October 2019

    Warnings:
    Strong winds in Nan'ao.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5.
    Moderate seas.

    Nan'ao:
    Northeast force 5 to 6.
    Moderate to rough seas.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    East to northeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 4 to 5, occasionally force 6 .

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

    Waglan Island Wind east-southeast force 3
      Visibility 27 Kilometres

    Shantou Wind south-southeast force 2
      Visibility 30 Kilometres

    Huangmaozhou Wind east-southeast force 3

    Xisha Wind northeast force 3
      Visibility 17 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 21/OCT/2019
    (Next update at 17:30 HKT 21/OCT/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON 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:  090/10
       OFFSHORE:  090/10-15                            30-24
   B.   2000 FT:  080/10-15                            19
   C.   5000 FT:  010/15                               13
   D.  10000 FT:  330/15                               7
   E.  18000 FT:  300/25                               MS2
   F.  24000 FT:  310/40                               MS13
   G.  30000 FT:  310/50                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : NIL.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY 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.

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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 21/Oct/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.3 C
Minimum Air Temperature                     23.4 C
Grass Minimum Temperature                   23.5 C
Relative Humidity                        62 - 93 Percent
Rainfall                                     3.5 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2315.6 mm

Other Stations                Min                  Max
King's Park                  23.0 C               28.1 C
Wong Chuk Hang               21.6 C               27.6 C
Ta Kwu Ling                  21.3 C               29.7 C
Lau Fau Shan                 22.3 C               29.3 C
Tai Po                       22.1 C               27.5 C
Sha Tin                      22.2 C               28.6 C
Tuen Mun                     23.4 C               28.4 C
Tseung Kwan O                21.2 C               27.6 C
Sai Kung                     23.0 C               27.2 C
Cheung Chau                  21.9 C               28.5 C
Chek Lap Kok                 24.2 C               29.4 C
Tsing Yi                     23.3 C               28.3 C
Shek Kong                    21.8 C               29.4 C
Tsuen Wan Ho Koon            20.6 C               27.5 C
Tsuen Wan Shing Mun Valley   21.4 C               28.6 C
Hong Kong Park               22.5 C               28.5 C
Shau Kei Wan                 22.2 C               26.6 C
Kowloon City                 22.8 C               29.0 C
Happy Valley                 22.3 C               28.6 C
Wong Tai Sin                 23.0 C               28.0 C
Stanley                      23.8 C               27.2 C
Kwun Tong                    22.6 C               27.4 C
Sham Shui Po                 23.1 C               29.7 C
Kai Tak Runway Park          23.3 C               27.5 C
Yuen Long Park               22.1 C               30.0 C
Tai Mei Tuk               22.4 C               29.6 C

Duration of sunshine (King's Park):              7.7 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 (20 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                           0.13
Sai Wan Ho                          0.10
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14

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 20 Oct
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