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Bulletin issued at 21:02 HKT 23/Nov/2018

At 9 p.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 71 per cent.

The air temperatures at other places were:

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

Here is the information on Tropical Storm Usagi at 8 p.m.:
Location: 10.5 degrees north, 110.7 degrees east.


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


Climatological Information for 23 Nov

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Bulletin updated at 20:45 HKT 23/Nov/2018

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

A dry northeast monsoon is affecting Guangdong.

At 8 p.m., Tropical Storm Usagi was centred about 440 kilometres east of Ho Chi Minh City. It is forecast to move west or west-southwest at about 12 kilometres per hour towards the southern part of Vietnam. Meanwhile, Typhoon Man-yi was centred about 1130 kilometres southwest of Iwo Jima. It is forecast to move north-northwest at about 15 kilometres per hour across the western North Pacific.

Weather forecast for tonight and tomorrow

Mainly fine. The minimum temperature will be about 19 degrees in the urban areas, and a couple of degrees lower in the New Territories. Dry during the day tomorrow with a maximum temperature of around 24 degrees. Moderate northerly winds, becoming east to northeasterlies tomorrow, occasionally fresh.

Outlook : Becoming cloudy with rain in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 24/11/2018; 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 23/Nov/2018

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

GENERAL SITUATION AT 230900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. FOR DETAILS ON TROPICAL STORM USAGI (1829), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 231300 UTC:

HONG KONG= N 5-6, E TO NE UP TO 7 TOMORROW. FINE. SEA 2-3 M, BEC 4 M. SWELL NE 2-3 M. TEMP 19-24 C. =
KWANGTUNG= N 6-7, E TO NE 6-7 TOMORROW. FINE. SEA 3-4 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= N 7-8, E TO NE 7-8 TOMORROW. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
PRATAS= N 6-7, E TO NE 6-7 TOMORROW. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
BALINTANG= N 7-8, E TO NE 7-8 TOMORROW. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
SCARBOROUGH= NE 7-8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 3 M. =
PARACEL= N TO NE 6-7, 8 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, 6 M AT FIRST. SWELL NE 2-3 M. =
TONKIN= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2 M. =
DANANG= N TO NE 7-8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 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 19:30 HKT 23/Nov/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 23 November 2018

    Warnings:
    Strong winds in all areas.

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

    At 7 p.m., Tropical Storm Usagi with maximum sustained winds of about 75 kilometres per hour near its centre was located at 10.6 degrees north, 110.8 degrees east. It is forecast to move west or west-southwest at about 12 kilometres per hour towards the southern part of Vietnam.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 5 to 6. East to northeast up to force 7 tomorrow.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    North force 6 to 7. East to northeast force 6 to 7 tomorrow.
    Rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7.

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

    Waglan Island Wind east force 3
      Visibility 20 Kilometres

    Shantou Wind east force 2
      Visibility 28 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind north-northeast force 3
      Visibility 8 Kilometres

    Xisha Wind northeast force 4
      Visibility 13 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 23/NOV/2018
    (Next update at 01:30 HKT 24/NOV/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A DRY NORTHEAST MONSOON IS AFFECTING GUANGDONG.
     AT 4 P.M., TROPICAL STORM USAGI WAS CENTRED NEAR
     10.6 DEGREES NORTH, 111.2 DEGREES EAST.  IT IS
     FORECAST TO MOVE WEST OR WEST-SOUTHWEST AT ABOUT
     8 KNOTS TOWARDS THE SOUTHERN PART OF VIETNAM.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10 BEC 090/10-15
       OFFSHORE:  090/10-15, OCNL 20 LATER             22-18
   B.   2000 FT:  090/10-15, OCNL 20 LATER             15
   C.   5000 FT:  060/10                               12
   D.  10000 FT:  260/15                               7
   E.  18000 FT:  250/30                               MS6
   F.  24000 FT:  290/45                               MS17
   G.  30000 FT:  290/60                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 7 KM.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 7600 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS LATER.
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS, FRESH AT
     TIMES.  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 21:30 HKT 23/Nov/2018


    Tropical Cyclone Warning

    At 231200 UTC, Tropical Storm Usagi (1829) with central pressure 988 hectopascals was centred within 60 nautical miles of one zero point five degrees north (10.5 N) one one zero point seven degrees east (110.7 E) and is forecast to move west or west-southwest at about 6 knots for the next 24 hours.

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

    Radius of over 33 knot winds 45 nautical miles.
    Radius of over 2 metre waves 120 nautical miles.

    Forecast position and intensity at 241200 UTC
    One zero point four degrees north (10.4 N)
    One zero eight point five degrees east (108.5 E)
    Maximum winds 45 knots.

    Forecast position and intensity at 251200 UTC
    One zero point nine degrees north (10.9 N)
    One zero six point five degrees east (106.5 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 261200 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 23/Nov/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     21.9 C
Minimum Air Temperature                     18.8 C
Grass Minimum Temperature                   19.2 C
Relative Humidity                        60 - 78 Percent
Rainfall                                     0.2 mm 
Total rainfall since 1st January          2090.3 mm
Against an average of                     2364.9 mm

Other Stations                Min                  Max
King's Park                  18.2 C               21.7 C
Wong Chuk Hang               19.0 C               22.0 C
Ta Kwu Ling                  17.3 C               22.9 C
Lau Fau Shan                 17.2 C               24.0 C
Tai Po                       17.6 C               21.5 C
Sha Tin                      18.3 C               21.2 C
Tuen Mun                     18.2 C               22.9 C
Tseung Kwan O                17.6 C               21.3 C
Sai Kung                     17.8 C               20.9 C
Cheung Chau                  17.7 C               22.6 C
Chek Lap Kok                 18.3 C               23.8 C
Tsing Yi                     18.8 C               22.4 C
Shek Kong                    17.5 C               23.0 C
Tsuen Wan Ho Koon            16.7 C               21.3 C
Tsuen Wan Shing Mun Valley   18.6 C               22.6 C
Hong Kong Park               19.2 C               22.3 C
Shau Kei Wan                 18.5 C               21.9 C
Kowloon City                 17.9 C               22.0 C
Happy Valley                 19.3 C               22.6 C
Wong Tai Sin                 18.3 C               21.6 C
Stanley                      19.1 C               21.8 C
Kwun Tong                    17.9 C               21.5 C
Sham Shui Po                 18.5 C               23.3 C
Kai Tak Runway Park          18.5 C               21.9 C
Yuen Long Park               17.7 C               22.6 C
Tai Mei Tuk               17.3 C               22.4 C

Duration of sunshine (King's Park):              1.4 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 5.
 

Yesterday's (22 Nov 2018) 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                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.09
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 22 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <23 Nov 2018> 

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