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Bulletin issued at 10:02 HKT 20/Nov/2019

At 10 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 66 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 20 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 20 degrees;
Tai Po 20 degrees;
Sha Tin 20 degrees;
Tseung Kwan O 20 degrees;
Sai Kung 20 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 21 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 20 degrees;
Happy Valley 21 degrees;
Wong Tai Sin 21 degrees;
Stanley 21 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 20 degrees;
Tai Mei Tuk 21 degrees.

Here is the information on Tropical Storm Kalmaegi at 10 a.m.:
Location: 17.2 degrees north, 121.4 degrees east.


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


Climatological Information for 20 Nov

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Bulletin updated at 09:45 HKT 20/Nov/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 10 a.m., Tropical Storm Kalmaegi was centred about 300 kilometres north of Manila. It is forecast to move southwest at about 30 kilometres per hour across Luzon and weaken gradually. Besides, an area of low pressure over the seas east of the Philippines has intensified into a tropical depression and was named Fung-wong. At 10 a.m., Fung-wong was centred about 760 kilometres east-northeast of Manila. It is forecast to move northwest at about 22 kilometres per hour towards the vicinity of Luzon Strait.

Weather forecast for today

Mainly fine and dry. Moderate east to northeasterly winds, becoming fresh later.

Outlook : Mainly fine and dry with temperatures rising gradually in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 20/11/2019; 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 20/Nov/2019

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 192100 UTC:
FOR DETAILS ON TROPICAL STORM KALMAEGI (1926), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= NE 4-5, OCNL 6. LIGHT RAIN PATCHES. SEA UP TO 3 M. SWELL NE 2-3 M. TEMP 24-19 C. =
KWANGTUNG= NE 5-6, 7-8 IN E. LIGHT RAIN PATCHES. SEA 2-3 M, 4-6 M IN E. SWELL NE 3-4 M, SE 3-4 M. =
TAIWAN STRAIT= NE 7-8, OCNL 9. CLD. SEA UP TO 8 M. SWELL NE 3-4 M. =
BASHI= NE 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 4-5 M, SE 4-5 M. =
PRATAS= NE 6-7, OCNL 8. ISOL SHOWERS. SEA UP TO 6 M. SWELL NE 3-4 M, SE 3-4 M. =
BALINTANG= E TO NE 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 4-5 M, SE 4-5 M. =
SCARBOROUGH= N TO NE 7-8. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 3-4 M. =
PARACEL= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 5-6. RAIN PATCHES. SEA 2-3 M. =
DANANG= NE 5-6. RAIN PATCHES. 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.


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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 20/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 20 November 2019

    Warnings:
    Gale force winds in Nan'ao. Strong winds in Hong Kong adjacent waters, Shanwei, south of Hong Kong and Shangchuan Dao.

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

    At 9 a.m., Tropical Storm Kalmaegi with maximum sustained winds of about 65 kilometres per hour near its centre was located at 17.4 degrees north, 121.5 degrees east. It is forecast to move southwest at about 30 kilometres per hour across Luzon and weaken gradually. The low pressure area over the seas east of the Philipines has intensified into a tropical depression and was named Fung-wong. At 9 a.m., Fung-wong with maximum sustained winds of about 45 kilometres per hour near its centre was located at 16.3 degrees north, 127.8 degrees east. It is forecast to move northwest at about 22 kilometres per hour towards the vicinity of Luzon Strait.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5, occasionally force 6.
    A few light rain patches.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 7 to 8.
    Rough to very rough seas.

    Shanwei:
    Northeast force 6 to 7.
    Rough seas.

    South of Hong Kong and Shangchuan Dao:
    Northeast force 5 to 6, occasionally force 7.
    Moderate to rough seas.

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

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

    Waglan Island Wind northeast force 5
      Visibility 17 Kilometres

    Shantou Wind southwest force 1
      Visibility 16 Kilometres

    Dongsha Wind north-northeast force 5
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind north force 3
      Visibility 14 Kilometres

    Xisha Wind northeast force 4
      Visibility 11 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 20/NOV/2019
    (Next update at 12:30 HKT 20/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 THE SOUTH
     CHINA COASTAL AREAS.
     AT 8 A.M.,TROPICAL STORM KALMAEGI WAS CENTRED AT
     17.6 DEGREES NORTH, 121.7 DEGREES EAST. IT IS
     FORECAST TO MOVE SOUTHWEST AT ABOUT 16 KNOTS
     ACROSS LUZON AND WEAKEN GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/10-15
                  BECMG 080/15 OCNL 20
       OFFSHORE:  050/15-20
                  BECMG 080/20-25                      18-24
   B.   2000 FT:  070/15-20                            17
   C.   5000 FT:  350/5                                10
   D.  10000 FT:  350/5                                6
   E.  18000 FT:  270/20                               MS4
   F.  24000 FT:  290/20                               MS14
   G.  30000 FT:  280/30                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT SCT 4500 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 4800, 5800, 8400 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 24 DEG
IV.  FURTHER OUTLOOK: 
     FRESH EASTERLY WINDS, STRONG OFFSHORE. 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)

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    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 09:30 HKT 20/Nov/2019


    Tropical Cyclone Warning

    At 200000 UTC, Tropical Storm Kalmaegi (1926) with central pressure 995 hectopascals was centred within 90 nautical miles of one seven point five degrees north (17.5 N) one two one point six degrees east (121.6 E) and is forecast to move southwest at about 16 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 60 nautical miles.
    Radius of over 2 metre waves 180 nautical miles.

    Forecast position and intensity at 210000 UTC
    Dissipated over sea.



    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.

    Tropical Cyclone Track
    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 20/Nov/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     22.7 C
Minimum Air Temperature                     17.9 C
Grass Minimum Temperature                   16.8 C
Relative Humidity                        59 - 68 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2360.9 mm

Other Stations                Min                  Max
King's Park                  16.8 C               22.3 C
Wong Chuk Hang               18.0 C               22.3 C
Ta Kwu Ling                  15.3 C               23.3 C
Lau Fau Shan                 15.6 C               22.8 C
Tai Po                       15.7 C               23.3 C
Sha Tin                      16.4 C               22.6 C
Tseung Kwan O                15.9 C               23.0 C
Sai Kung                     16.7 C               22.0 C
Cheung Chau                  16.2 C               24.2 C
Chek Lap Kok                 16.9 C               23.2 C
Tsing Yi                     17.1 C               22.8 C
Shek Kong                    15.6 C               23.0 C
Tsuen Wan Shing Mun Valley   15.4 C               23.3 C
Hong Kong Park               17.8 C               22.3 C
Shau Kei Wan                 16.4 C               23.2 C
Kowloon City                 16.2 C               22.7 C
Happy Valley                 17.7 C               22.9 C
Wong Tai Sin                 16.6 C               23.4 C
Stanley                      17.6 C               22.7 C
Kwun Tong                    16.8 C               22.7 C
Sham Shui Po                 16.9 C               24.2 C
Kai Tak Runway Park          17.3 C               22.6 C
Yuen Long Park               16.0 C               23.8 C
Tai Mei Tuk               15.8 C               24.1 C

Duration of sunshine (King's Park):              4.3 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 5.
 

Yesterday's (19 Nov 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                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.14
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 19 Nov
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