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Bulletin issued at 05:02 HKT 10/Nov/2019

At 5 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 79 per cent.

The air temperatures at other places were:

King's Park 20 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 16 degrees;
Lau Fau Shan 18 degrees;
Tai Po 21 degrees;
Sha Tin 19 degrees;
Tuen Mun 19 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 20 degrees;
Cheung Chau 20 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 21 degrees;
Shek Kong 17 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 18 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 19 degrees;
Happy Valley 21 degrees;
Wong Tai Sin 20 degrees;
Stanley 21 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 17 degrees;
Tai Mei Tuk 19 degrees.

Here is the information on Severe Tropical Storm Nakri at 5 a.m.:
Location: 12.5 degrees north, 112.3 degrees east.


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


Climatological Information for 10 Nov

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Bulletin updated at 04:45 HKT 10/Nov/2019

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

The northeast monsoon is bringing fine weather to southern China.

At 5 a.m., Severe Tropical Storm Nakri was centred about 590 kilometres southeast of Da Nang. It is forecast to move west-northwest at about 14 kilometres per hour towards the central part of Vietnam.

Weather forecast for today

Mainly fine. Dry during the day with a maximum temperature of around 26 degrees. Moderate east to northeasterly winds.

Outlook : Mainly fine in the next couple of days with temperatures rising slightly.


(The above forecast period is valid up to 23:59 HKT today, 10/11/2019; 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 21:00 HKT 09/Nov/2019

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

GENERAL SITUATION AT 090900 UTC:
FOR DETAILS ON SEVERE TROPICAL STORM NAKRI (1924), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. THE NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 091300 UTC:

HONG KONG= E TO NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL NE 2 M. TEMP 21-26 C. =
KWANGTUNG= NE 5-6, OCNL 7. CLD. SEA UP TO 4 M. SWELL NE 3 M. =
TAIWAN STRAIT= NE 6-7, OCNL 8. CLD. SEA UP TO 6 M. SWELL NE 3-4 M. =
BASHI= NE 7-8. ISOL SHOWERS AND TS. SEA 4-6 M. SWELL NE 3-4 M. =
PRATAS= NE 7-8. ISOL SHOWERS AND TS. SEA 4-6 M. SWELL NE 3-4 M. =
BALINTANG= NE 7-8. ISOL SHOWERS AND TS. SEA 4-6 M. SWELL NE 3-4 M. =
SCARBOROUGH= E TO NE 7-8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 4-5 M. =
PARACEL= N TO NE 7-8, OCNL 9 IN S. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 8 M IN S. SWELL NE 4-5 M. =
TONKIN= N TO NE 5-6. CLD. SEA 2-3 M. =
DANANG= N TO NE 7-8. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 4-5 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 05:30 HKT 10/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 10 November 2019

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

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

    At 5 a.m., Severe Tropical Storm Nakri with maximum sustained winds of about 105 kilometres per hour near its centre was located at 12.5 degrees north, 112.3 degrees east, it is forecast to move west-northwest at about 14 kilometres per hour towards the central part of Vietnam.

    Area forecasts for the next 24 hours

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

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

    Shanwei, South of Hong Kong and 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.

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

    Waglan Island Wind east-northeast force 5
      Visibility 18 Kilometres

    Shantou Wind east force 1
      Visibility 30 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind east force 2
      Visibility 12 Kilometres

    Xisha Wind east-northeast force 4
      Visibility 6 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 10/NOV/2019
    (Next update at 9:00-9:30 HKT 10/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 11 P.M. LAST NIGHT, SEVERE TROPICAL STORM
     NAKRI WAS CENTRED AT 12.5 DEGREES NORTH 113.0
     DEGREES EAST. IT IS FORECAST TO MOVE WEST AT
     ABOUT 6 KNOTS TOWARDS THE CENTRAL PART OF
     VIETNAM.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/5-10
       OFFSHORE:  070/15-20, OCNL 25 AT FIRST          20-26
   B.   2000 FT:  070/15-20, OCNL 25 AT FIRST          16
   C.   5000 FT:  060/10                               13
   D.  10000 FT:  250/10                               10
   E.  18000 FT:  300/20                               MS4
   F.  24000 FT:  300/15                               MS14
   G.  30000 FT:  260/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4600 - 5000 FT
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      NO CLOUDS OF HEIGHT AT OR BELOW 10,000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS.
     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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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

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    Bulletin issued at 03:30 HKT 10/Nov/2019


    Tropical Cyclone Warning

    At 091800 UTC, Severe Tropical Storm Nakri (1924) with central pressure 980 hectopascals was centred within 60 nautical miles of one two point five degrees north (12.5 N) one one two point seven degrees east (112.7 E) and is forecast to move west-northwest at about 8 knots for the next 24 hours.

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

    Radius of over 33 knot winds 150 nautical miles.
    Radius of over 47 knot winds 60 nautical miles.
    Radius of over 2 metre waves 300 nautical miles.

    Forecast position and intensity at 101800 UTC
    One three point one degrees north (13.1 N)
    One zero nine point five degrees east (109.5 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 111800 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.

    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 10/Nov/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.0 C
Minimum Air Temperature                     20.4 C
Grass Minimum Temperature                   17.7 C
Relative Humidity                        52 - 76 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2348.2 mm

Other Stations                Min                  Max
King's Park                  19.9 C               25.4 C
Wong Chuk Hang               20.7 C               25.3 C
Ta Kwu Ling                  13.2 C               27.3 C
Lau Fau Shan                 17.0 C               27.5 C
Tai Po                       17.3 C               24.7 C
Sha Tin                      19.4 C               25.9 C
Tuen Mun                     19.4 C               27.2 C
Tseung Kwan O                18.6 C               25.8 C
Sai Kung                     20.0 C               24.1 C
Cheung Chau                  18.9 C               27.8 C
Chek Lap Kok                 19.6 C               28.0 C
Tsing Yi                     20.6 C               26.3 C
Shek Kong                    15.1 C               26.8 C
Tsuen Wan Ho Koon            17.6 C               25.5 C
Tsuen Wan Shing Mun Valley   17.5 C               26.1 C
Hong Kong Park               20.5 C               26.5 C
Shau Kei Wan                 19.3 C               26.0 C
Kowloon City                 19.4 C               26.9 C
Happy Valley                 19.4 C               25.7 C
Wong Tai Sin                 19.6 C               25.8 C
Stanley                      20.5 C               24.6 C
Kwun Tong                    19.6 C               25.3 C
Sham Shui Po                 19.6 C               28.4 C
Kai Tak Runway Park          20.7 C               24.9 C
Yuen Long Park               18.1 C               27.7 C
Tai Mei Tuk               19.5 C               26.7 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 6.
 

Yesterday's (09 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                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.09
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 09 Nov
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