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Bulletin issued at 10:02 HKT 19/Nov/2019

At 10 a.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 64 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

Please be reminded that:

The Fire Danger Warning is Red and the fire risk is extreme.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 18 degrees;
Lau Fau Shan 18 degrees;
Tai Po 19 degrees;
Sha Tin 19 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 19 degrees;
Cheung Chau 20 degrees;
Chek Lap Kok 19 degrees;
Tsing Yi 19 degrees;
Shek Kong 19 degrees;
Tsuen Wan Shing Mun Valley 20 degrees;
Hong Kong Park 20 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 20 degrees;
Happy Valley 21 degrees;
Wong Tai Sin 20 degrees;
Stanley 22 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 19 degrees;
Tai Mei Tuk 21 degrees.

Here is the information on Severe Tropical Storm Kalmaegi at 10 a.m.:
Location: 19.1 degrees north, 122.1 degrees east.


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


Climatological Information for 19 Nov

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Bulletin updated at 09:45 HKT 19/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. Locally, the minimum temperature recorded at the Observatory this morning was 17.9 degrees, the lowest so far since this autumn.

At 10 a.m., Severe Tropical Storm Kalmaegi was centred about 520 kilometres north-northeast of Manila. It is forecast to move southwest at about 15 kilometres per hour across Luzon.

Weather forecast for today

Fine and dry. Moderate to fresh north to northeasterly winds.

Outlook : Dry with sunny periods in the next couple of days. Cooler tomorrow morning.


(The above forecast period is valid up to 23:59 HKT today, 19/11/2019; 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 19/Nov/2019

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

GENERAL SITUATION AT 182100 UTC:
COLD FRONT 18N 112E 22N 120E S SLOWLY FOR DETAILS ON SEVERE TROPICAL STORM KALMAEGI (1926), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 190100 UTC:

HONG KONG= N TO NE 5-6. FINE. SEA 2-3 M. SWELL NE UP TO 2 M. TEMP 24-17 C. =
KWANGTUNG= N TO NE 6-7, UP TO 8 IN E. FINE. SEA 3-4 M, UP TO 6 M IN E. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 8-9. CLD. SEA 6-8 M. SWELL NE 3-4 M. =
BASHI= NE 8-9, UP TO 10 AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, UP TO 10 M AT FIRST. SWELL E TO NE 3-5 M. =
PRATAS= NE 6-7, OCNL 8. ISOL SHOWERS. SEA UP TO 6 M. SWELL NE 2-3 M. =
BALINTANG= CYCLONIC 10-11, NE 8-9 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 10-12 M, 6-8 M LATER. SWELL E TO NE 3-5 M. =
SCARBOROUGH= NE 7-8, CYCLONIC 8-9 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, 6-8 M LATER. SWELL NE 3-5 M. =
PARACEL= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 4-5, OCNL 6. CLD. SEA UP TO 3 M. =
DANANG= NE 5-6. CLD. 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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    Bulletin issued at 09:30 HKT 19/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 19 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 intense northeast monsoon is affecting the south China coastal waters.

    At 9 a.m., Severe Tropical Storm Kalmaegi with maximum sustained winds of about 105 kilometres per hour near its centre was located at 19.1 degrees north, 122.1 degrees east. It is forecast to move southwest at about 15 kilometres per hour across Luzon.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6.
    Moderate to rough seas.

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

    Shanwei, South of Hong Kong and Shangchuan Dao:
    North to northeast force 6 to 7.
    Rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 6 to 7, up to force 8 in east.

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

    Waglan Island Wind north force 4
      Visibility 22 Kilometres

    Shantou Wind south-southwest force 1
      Visibility 21 Kilometres

    Dongsha Wind north-northeast force 5
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 3

    Macau Wind north force 4
      Visibility 10 Kilometres

    Xisha Wind northeast force 3
      Visibility 13 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 19/NOV/2019
    (Next update at 12:30 HKT 19/NOV/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE INTENSE NORTHEAST MONSOON IS AFFECTING THE
     SOUTH CHINA COASTAL AREAS.
     AT 9 A.M., SEVERE TROPICAL STORM KALMAEGI WAS
     CENTRED AT 19.1 DEGREES NORTH, 122.1 DEGREES
     EAST. IT IS FORECAST TO MOVE SOUTHWEST AT ABOUT
     8 KNOTS TOWARDS LUZON.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  010/10-15
       OFFSHORE:  010/20-25                            17-24
   B.   2000 FT:  010/20-25                            14
   C.   5000 FT:  030/10                               14
   D.  10000 FT:  040/10                               7
   E.  18000 FT:  280/30                               MS7
   F.  24000 FT:  280/30                               MS16
   G.  30000 FT:  240/35                               MS31
   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: 16500 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.5-3.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS,
     OCCASIONALLY 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.

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    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 09:30 HKT 19/Nov/2019


    Tropical Cyclone Warning

    At 190000 UTC, Severe Tropical Storm Kalmaegi (1926) with central pressure 980 hectopascals was centred within 60 nautical miles of one nine point one degrees north (19.1 N) one two two point two degrees east (122.2 E) and is forecast to move southwest at about 10 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 55 knots.

    Radius of over 33 knot winds 120 nautical miles.
    Radius of over 47 knot winds 60 nautical miles.
    Radius of over 2 metre waves 180 nautical miles.

    Forecast position and intensity at 200000 UTC
    One six point five degrees north (16.5 N)
    One one nine point one degrees east (119.1 E)
    Maximum winds 30 knots.

    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 19/Nov/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.4 C
Minimum Air Temperature                     20.6 C
Grass Minimum Temperature                   18.8 C
Relative Humidity                        57 - 87 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2359.8 mm

Other Stations                Min                  Max
King's Park                  19.6 C               28.9 C
Wong Chuk Hang               18.7 C               27.9 C
Ta Kwu Ling                  16.1 C               29.8 C
Lau Fau Shan                 18.1 C               28.4 C
Tai Po                       18.8 C               28.7 C
Sha Tin                      18.4 C               29.3 C
Tseung Kwan O                18.6 C               30.4 C
Sai Kung                     19.0 C               27.9 C
Cheung Chau                  19.1 C               30.7 C
Chek Lap Kok                 20.1 C               28.7 C
Tsing Yi                     19.7 C               29.5 C
Shek Kong                    17.8 C               29.7 C
Tsuen Wan Ho Koon            17.9 C               27.3 C
Tsuen Wan Shing Mun Valley   18.3 C               29.6 C
Hong Kong Park               20.2 C               30.1 C
Shau Kei Wan                 19.8 C               29.1 C
Kowloon City                 19.1 C               29.9 C
Happy Valley                 18.8 C               29.9 C
Wong Tai Sin                 19.7 C               30.7 C
Stanley                      19.8 C               28.5 C
Kwun Tong                    19.8 C               28.8 C
Sham Shui Po                 19.4 C               30.9 C
Kai Tak Runway Park          20.5 C               30.1 C
Yuen Long Park               18.4 C               29.9 C
Tai Mei Tuk               18.1 C               30.0 C

Duration of sunshine (King's Park):              9.9 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 (18 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                      0.13
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 18 Nov
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