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Bulletin issued at 16:02 HKT 18/Nov/2018

At 4 p.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 26 degrees;
Tai Po 24 degrees;
Sha Tin 25 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 24 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 27 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 26 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 27 degrees;
Stanley 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 25 degrees.

Here is the information on Tropical Depression Toraji at 4 p.m.:
Location: 11.6 degrees north, 109.1 degrees east.


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


Climatological Information for 18 Nov

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Bulletin updated at 16:15 HKT 18/Nov/2018

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

Pressure is rising over the northern part of southern China. A replenishment of the northeast monsoon is expected to reach the coastal areas overnight.

Tropical Depression Toraji has made landfall over the southern part of Vietnam. At 4 p.m., Toraji was centred about 280 kilometres east-northeast of Ho Chi Minh City. It is forecast to move west at about 10 kilometres per hour across the southern part of Vietnam. Besides, an area of low pressure is bringing unsettled weather to the seas east of the southern part of the Philippines. A tropical cyclone appears to be forming.

Weather forecast for tonight and tomorrow

Mainly cloudy with one or two light rain patches and relatively low visibility overnight. It will be slightly cooler with a minimum temperature of about 21 degrees. Bright periods tomorrow with a maximum temperature of around 25 degrees. Moderate easterly winds, becoming northerlies overnight, occasionally fresh.

Outlook : Mainly cloudy with a few rain patches midweek this week. Temperatures will fall on Wednesday night. Cooler in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 19/11/2018; 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 09:00 HKT 18/Nov/2018

N0 WARNING.

GENERAL SITUATION AT 172100 UTC:
FOR DETAILS ON TROPICAL DEPRESSION TORAJI (1827), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 180100 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 25-20 C. =
KWANGTUNG= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 2 M. =
TAIWAN STRAIT= NE 5-6, 7 LATER. RAIN PATCHES. SEA 2-3 M, 4 M LATER. SWELL NE 2 M. =
BASHI= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 2 M. =
PRATAS= E TO NE 5-6. RAIN PATCHES. 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 TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE UP TO 2 M. =
TONKIN= NE 4-5, BEC 6. RAIN PATCHES. SEA UP TO 2 M, BEC 3 M. =
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 16:30 HKT 18/Nov/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 18 November 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    Pressure is rising over the northern part of southern China. A replenishment of the northeast monsoon is expected to reach the coastal waters overnight.

    At 4 p.m., Tropical Depression Toraji with maximum sustained winds of about 45 kilometres per hour near its centre was located at 11.6 degrees north, 109.1 degrees east. It is forecast to move west at about 10 kilometres per hour across the southern part of Vietnam.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6, north force 6 overnight.
    A few rain patches. Mist patches.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East force 5 to 6, north up to force 7 overnight.
    Moderate to 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 north-northeast force 3
      Visibility 14 Kilometres

    Shantou Wind southeast force 1
      Visibility 18 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind southeast force 2
      Visibility 15 Kilometres

    Xisha Wind north-northeast force 2
      Visibility 30 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 12:30 HKT 18/NOV/2018
    (Next update at 17:30 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.
     AT NOON, TROPICAL DEPRESSION TORAJI WAS CENTRED
     NEAR 11.3 DEGREES NORTH, 109.8 DEGREES EAST.  IT
     IS FORECAST TO MOVE WEST AT ABOUT 5 KNOTS
     TOWARDS THE SOUTHERN PART OF VIETNAM.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  100/10-15
       OFFSHORE:  080/15-20, OCNL 25 AT FIRST          28-23
   B.   2000 FT:  140/15-20                            21
   C.   5000 FT:  170/10                               16
   D.  10000 FT:  260/15                               9
   E.  18000 FT:  250/30                               MS5
   F.  24000 FT:  250/40                               MS16
   G.  30000 FT:  250/50                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY INTERVALS WITH A FEW RAIN AND MIST
      PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 16000 FT
      10 DEG. C LEVEL(S) : 7600, 9600 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE.  MOD NEAR HILLS.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, BECOMING MODERATE TO
     FRESH NORTH TO NORTHEASTERLY WINDS.  MAINLY
     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.

    There is no Significant Weather Information (SIGMET)

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    Tropical Cyclone Warning
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    Tropical Cyclone Warning

    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 15:31 HKT 18/Nov/2018


    Tropical Cyclone Warning

    At 180600 UTC, Tropical Depression Toraji (1827) with central pressure 1002 hectopascals was centred within 90 nautical miles of one one point six degrees north (11.6 N) one zero nine point three degrees east (109.3 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 60 nautical miles.

    Forecast position and intensity at 190600 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 18/Nov/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     23.8 C
Minimum Air Temperature                     23.1 C
Grass Minimum Temperature                   22.5 C
Relative Humidity                        82 - 94 Percent
Rainfall                                     0.5 mm 
Total rainfall since 1st January          2087.6 mm
Against an average of                     2358.4 mm

Other Stations                Min                  Max
King's Park                  22.5 C               23.5 C
Wong Chuk Hang               22.9 C               24.2 C
Ta Kwu Ling                  22.8 C               25.2 C
Lau Fau Shan                 22.2 C               24.5 C
Tai Po                       22.1 C               23.3 C
Sha Tin                      22.9 C               24.1 C
Tuen Mun                     23.1 C               25.0 C
Tseung Kwan O                22.4 C               23.5 C
Sai Kung                     23.0 C               24.2 C
Cheung Chau                  22.6 C               24.2 C
Chek Lap Kok                 22.4 C               26.2 C
Tsing Yi                     23.2 C               24.8 C
Shek Kong                    23.3 C               25.7 C
Tsuen Wan Ho Koon            22.0 C               24.4 C
Tsuen Wan Shing Mun Valley   22.9 C               24.3 C
Hong Kong Park               23.0 C               23.9 C
Shau Kei Wan                 22.4 C               23.4 C
Kowloon City                 22.4 C               23.9 C
Happy Valley                 23.2 C               24.3 C
Wong Tai Sin                 22.8 C               24.1 C
Stanley                      22.7 C               23.7 C
Kwun Tong                    22.3 C               23.6 C
Sham Shui Po                 22.9 C               25.2 C
Kai Tak Runway Park          23.0 C               24.4 C
Yuen Long Park               23.2 C               24.9 C
Tai Mei Tuk               22.2 C               23.7 C

Duration of sunshine (King's Park):              0.0 H
The mean UV index recorded at King's Park yesterday was 0.5,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (17 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                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

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 17 Nov
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