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Bulletin issued at 23:02 HKT 10/Nov/2019

At 11 p.m. at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 74 per cent.

The air temperatures at other places were:

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

Here is the information on Tropical Storm Nakri at 11 p.m.:
Location: 12.6 degrees north, 109.4 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 23:15 HKT 10/Nov/2019

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

A dry northeast monsoon continued to bring fine weather to southern China today. Locally, it was fine and dry. The relative humidity over the New Territories fell to about 40 per cent in the afternoon. With the northeast monsoon moderating slightly in the next couple of days, temperatures over the south China coast will rise.

Besides, Severe Tropical Storm Nakri weakened into a tropical storm today. At 11 p.m., Nakri was centred about 400 kilometres south-southeast of Da Nang. It is forecast to move west-northwest at about 18 kilometres per hour across the central part of Vietnam.

Weather forecast for Hong Kong (Monday, 11 Nov 2019)

Fine. The minimum temperature will be about 21 degrees in the urban areas in the morning, and a few degrees lower in the New Territories. Dry during the day with a maximum temperature of about 27 degrees. Moderate east to northeasterly winds, fresh offshore later.

Outlook : Sunny intervals on Tuesday. Fine and dry in the following few days.


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

GALE WARNING AREAS: PARACEL AND DANANG.

GENERAL SITUATION AT 100900 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 101300 UTC:

HONG KONG= E TO NE 4-5. FINE. SEA UP TO 2 M. TEMP 21-27 C. =
KWANGTUNG= NE 4-5, OCNL 6. FINE. SEA 2-3 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 5-6. CLD. SEA 2-3 M. SWELL NE 2 M. =
BASHI= NE 5-6. CLD. SEA 2-3 M. SWELL NE 2-3 M. =
PRATAS= E TO NE 5-6. CLD. SEA 2-3 M. SWELL NE 2-3 M. =
BALINTANG= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2-3 M. =
PARACEL= N TO NE 6-7, OCNL 8 IN S AT FIRST. DOWN TO 2000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M IN S AT FIRST. SWELL NE 3-4 M. =
TONKIN= N TO NE 4-5, OCNL 6. CLD. SEA UP TO 2-3 M. =
DANANG= N TO NE 6-7, OCNL 8. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 3-4 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 23:30 HKT 10/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 10 November 2019

    Warnings:
    Strong winds in south of Hong Kong and Shangchuan Dao.

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

    At 11 p.m., Tropical Storm Nakri with maximum sustained winds of about 75 kilometres per hour near its centre was located at 12.6 degrees north, 109.4 degrees east. It is forecast to move west-northwest at about 18 kilometres per hour across 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 and Shanwei:
    Northeast force 4 to 5.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    East to northeast force 4 to 5, occasionally force 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 force 2

    Shantou Wind east-southeast force 1
      Visibility 30 Kilometres

    Dongsha Wind east-northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Xisha Wind east-northeast force 3
      Visibility 4700 Metres in rain

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 10/NOV/2019
    (Next update at 01:30 HKT 11/NOV/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. 
     SEVERE TROPICAL STORM NAKRI HAS WEAKENED INTO A
     TROPICAL STORM.
     AT 5 P.M., TROPICAL STORM NAKRI WAS CENTRED AT
     12.6 DEGREES NORTH 110.5 DEGREES EAST. IT IS
     FORECAST TO MOVE WEST-NORTHWEST AT ABOUT 10
     KNOTS TOWARDS THE CENTRAL PART OF VIETNAM.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/5-10
       OFFSHORE:  070/10-15                            25-20
   B.   2000 FT:  050/10-15                            18
   C.   5000 FT:  050/15                               15
   D.  10000 FT:  290/20                               9
   E.  18000 FT:  290/20                               MS2
   F.  24000 FT:  290/20                               MS13
   G.  30000 FT:  260/20                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2300 - 2600FT, 4400 - 5000 FT
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 9200 FT
   M. TURBULENCE    : NIL.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE 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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    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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    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 21:30 HKT 10/Nov/2019


    Tropical Cyclone Warning

    At 101200 UTC, Tropical Storm Nakri (1924) with central pressure 988 hectopascals was centred within 90 nautical miles of one two point six degrees north (12.6 N) one zero nine point eight degrees east (109.8 E) and is forecast to move west-northwest at about 10 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 45 knots.

    Radius of over 33 knot winds 120 nautical miles.
    Radius of over 2 metre waves 300 nautical miles.

    Forecast position and intensity at 111200 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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