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Bulletin issued at 22:02 HKT 17/Nov/2018

At 10 p.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 85 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 23 degrees;
Tai Po 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 23 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 24 degrees;
Tsing Yi 23 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 23 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 23 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 23 degrees.

Here is the information on Tropical Depression Toraji at 8 p.m.:
Location: 10.4 degrees north, 111.2 degrees east.


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


Climatological Information for 17 Nov

Regional Weather in Hong Kong

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Bulletin updated at 21:45 HKT 17/Nov/2018

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

The northeast monsoon is affecting the coast of Guangdong. Meanwhile, a band of clouds is covering the region.

At 8 p.m., Tropical Depression Toraji was centred about 500 kilometres east of Ho Chi Minh City. It is forecast to move west at about 10 kilometres per hour in the general direction of the southern part of Vietnam.

Weather forecast for tonight and tomorrow

Mainly cloudy. One or two rain patches and relatively low visibility in some areas in the morning and at night. Temperatures will range between 23 and 25 degrees. Moderate to fresh east to northeasterly winds.

Outlook : Slightly cooler on Monday. A few rain patches on Wednesday and temperatures will fall further at night. Cooler in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 18/11/2018; 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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Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 17/Nov/2018

N0 WARNING.

GENERAL SITUATION AT 170900 UTC:
FOR DETAILS ON TROPICAL DEPRESSION TORAJI (1827), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 171300 UTC:

HONG KONG= E TO NE 5-6. RAIN PATCHES. DOWN TO 4000 M IN MIST PATCHES. SEA 2-3 M. SWELL E TO NE UP TO 2 M. TEMP 23-25 C. =
KWANGTUNG= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 2 M. =
TAIWAN STRAIT= NE 5-6, 7 AT FIRST. RAIN PATCHES. SEA 2-3 M, 4 M AT FIRST. SWELL NE 2 M. =
BASHI= E 5-6. FINE. SEA 2-3 M. SWELL E TO NE 2 M. =
PRATAS= E 5-6. CLD. SEA 2-3 M. SWELL E TO NE 2 M. =
BALINTANG= E 5-6. FINE. SEA 2-3 M. SWELL E TO NE 2 M. =
SCARBOROUGH= E TO NE 4-5. FINE. SEA UP TO 2 M. SWELL E TO NE 2 M. =
PARACEL= E 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE UP TO 2 M. =
TONKIN= NE 4-5, 6 LATER. RAIN PATCHES. SEA UP TO 2 M, 3 M LATER. =
DANANG= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 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 19:30 HKT 17/Nov/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 17 November 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the coastal waters of Guangdong.

    At 7 p.m., Tropical Depression Toraji with maximum sustained winds of about 45 kilometres per hour near its centre was located at 10.4 degrees north, 111.2 degrees east. It is forecast to move west at about 10 kilometres per hour in the general direction of the southern part of Vietnam.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5 to 6.
    A few rain patches. Visibility relatively low in some areas.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East to northeast force 5 to 6.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 5 to 6, becoming easterly winds of up to force 7 later.

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

    Waglan Island Wind east-northeast force 5
      Visibility 17 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 30 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 7

    Macau Wind north-northeast force 1
      Visibility 3200 Metres in mist

    Xisha Wind northeast force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 19:30 HKT 17/NOV/2018
    (Next update at 01:30 HKT 18/NOV/2018)
    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 COAST OF
     GUANGDONG. MEANWHILE, A CLOUD BAND IS COVERING
     THE REGION.
     THE TROPICAL DEPRESSION OVER THE SOUTHERN PART
     OF THE SOUTH CHINA SEA HAS NAMED TORAJI. AT 7
     P.M., TORAJI WAS LOCATED AT 10.4 DEGREES NORTH,
     111.2 DEGREES EAST. IT IS FORECAST TO MOVE WEST
     AT ABOUT 5 KNOTS IN THE GENERAL DIRECTION OF THE
     SOUTHERN PART OF VIETNAM.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1900 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15
       OFFSHORE:  090/15-20 OCNL 25                    24-22
   B.   2000 FT:  090/15-20                            20
   C.   5000 FT:  160/10                               15
   D.  10000 FT:  250/15                               10
   E.  18000 FT:  260/25                               MS3
   F.  24000 FT:  260/35                               MS17
   G.  30000 FT:  250/50                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH A FEW RAIN PATCHES. LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 1500 FT  BKN 8000 FT.
   K. VISIBILITY    : 8 KM.  TEMPO 3000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 8400, 9600,10000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE. MOD NEAR HILLS.
   N. SEA STATE     : 2.0-3.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE.  CLOUDY WITH A FEW
     RAIN AND MIST PATCHES.=

    ===================================================================
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 21:31 HKT 17/Nov/2018


    Tropical Cyclone Warning

    At 171200 UTC, Tropical Depression Toraji (1827) with central pressure 1002 hectopascals was centred within 90 nautical miles of one zero point five degrees north (10.5 N) one one one point zero degrees east (111.0 E) and is forecast to move west at about 6 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 25 knots.

    Radius of over 2 metre waves 90 nautical miles.

    Forecast position and intensity at 181200 UTC
    One zero point three degrees north (10.3 N)
    One zero eight point seven degrees east (108.7 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 190000 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 17/Nov/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.9 C
Minimum Air Temperature                     22.9 C
Grass Minimum Temperature                   22.3 C
Relative Humidity                        80 - 95 Percent
Rainfall                                     1.1 mm 
Total rainfall since 1st January          2087.1 mm
Against an average of                     2358.1 mm

Other Stations                Min                  Max
King's Park                  22.4 C               25.2 C
Wong Chuk Hang               22.5 C               26.2 C
Ta Kwu Ling                  22.3 C               26.6 C
Lau Fau Shan                 21.3 C               27.5 C
Tai Po                       21.6 C               24.3 C
Sha Tin                      22.4 C               24.8 C
Tuen Mun                     23.1 C               26.7 C
Tseung Kwan O                22.2 C               24.6 C
Sai Kung                     22.6 C               24.6 C
Cheung Chau                  22.2 C               27.5 C
Chek Lap Kok                 23.4 C               27.8 C
Tsing Yi                     23.4 C               25.9 C
Shek Kong                    22.4 C               26.8 C
Tsuen Wan Ho Koon            21.6 C               25.1 C
Tsuen Wan Shing Mun Valley   22.9 C               25.0 C
Hong Kong Park               22.9 C               24.9 C
Shau Kei Wan                 22.4 C               23.7 C
Kowloon City                 22.2 C               25.1 C
Happy Valley                 22.8 C               25.2 C
Wong Tai Sin                 22.6 C               26.3 C
Stanley                      22.4 C               24.4 C
Kwun Tong                    22.1 C               25.3 C
Kai Tak Runway Park          22.9 C               24.4 C
Yuen Long Park               21.4 C               27.0 C
Tai Mei Tuk               22.1 C               25.3 C

Duration of sunshine (King's Park):              0.6 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 4.
 

Yesterday's (16 Nov 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.14 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                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14

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 16 Nov
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