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Bulletin issued at 12:02 HKT 19/Nov/2018

At noon at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 66 per cent.
During the past hour the mean UV Index recorded at King's Park was 6. The intensity of UV radiation was high.

The air temperatures at other places were:

King's Park 26 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 26 degrees;
Tai Po 24 degrees;
Sha Tin 24 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 23 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 24 degrees;
Tsing Yi 25 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 25 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 25 degrees;
Stanley 25 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 27 degrees.

No rainfall was recorded at the Hong Kong Observatory between midnight last night and midday today.


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


Climatological Information for 19 Nov

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 11:45 HKT 19/Nov/2018

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

The northeast monsoon is bringing slightly cooler weather to Guangdong.

Besides, an area of low pressure over the seas east of the southern part of the Philippines is bringing unsettled weather to the region. A tropical cyclone appears to be forming.

Weather forecast for this afternoon and tonight

Sunny intervals in the afternoon. Mainly cloudy tonight. Moderate north to northeasterly winds, occasionally fresh.

Outlook : Mainly cloudy tomorrow. A few rain patches on Wednesday night. Cooler in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 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 19/Nov/2018

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 182100 UTC:
THE NORTHEAST MONSOON IS AFFECT THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 190100 UTC:

HONG KONG= N TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL E UP TO 2 M. TEMP 25-21 C. =
KWANGTUNG= N TO NE 5-6, OCNL 7. LGT RAIN PATCHES. SEA UP TO 4 M. SWELL E 2 M. =
TAIWAN STRAIT= N TO NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 2 M, 3 M LATER. =
BASHI= NE 5-6, BEC 7. LGT RAIN PATCHES. SEA 2-3 M, BEC 4 M. SWELL E 2 M. =
PRATAS= N TO NE 5-6, OCNL 7. LGT RAIN PATCHES. SEA UP TO 4 M. SWELL E 2 M. =
BALINTANG= E TO NE 5-6, 7 LATER. ISOL SHOWERS LATER. SEA 2-3 M, 4 M LATER. SWELL E 2 M. =
SCARBOROUGH= E TO NE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO NE 2 M. =
PARACEL= E TO NE 5-6, OCNL 7. LGT RAIN PATCHES. SEA UP TO 4 M. SWELL E 2 M. =
TONKIN= N TO NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE UP TO 2 M. =
DANANG= E TO NE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS AT FIRST. SEA UP TO 3 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.


  • Map showing the 10 forecast areas
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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 12:30 HKT 19/Nov/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 19 November 2018

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    North to northeast force 6 to 7.
    Rough seas.

    South of Hong Kong and Shangchuan Dao:
    North to northeast force 5 to 6, occasionally force 7.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6, becoming northerly winds of force 7 later.

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

    Waglan Island Wind north-northeast force 3
      Visibility 50 Kilometres or above

    Dongsha Wind northeast force 4
      Visibility 9 Kilometres

    Huangmaozhou Wind northeast force 2

    Macau Wind north force 3
      Visibility 18 Kilometres

    Xisha Wind 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 19/NOV/2018
    (Next update at 17:30 HKT 19/NOV/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE COAST OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  010/10-15
                  BECMG 070/10-15
       OFFSHORE:  010/15-20
                  BECMG 070/15-20                      26-22
   B.   2000 FT:  360/15
                  BECMG 070/15-20                      17
   C.   5000 FT:  040/10                               16
   D.  10000 FT:  280/20                               8
   E.  18000 FT:  260/35                               MS5
   F.  24000 FT:  250/45                               MS16
   G.  30000 FT:  250/55                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2900-3600 FT
   I. WEATHER       : 
      SUNNY INTERVALS IN THE AFTERNOON. MAINLY CLOUDY
      TONIGHT.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT  SCT 5000 FT
   K. VISIBILITY    : 10 KM
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 8200 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS.  MAINLY CLOUDY
     WITH ONE OR TWO LIGHT RAIN 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)

    Please click here for more about the SIGMET

    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 21:30 HKT 18/Nov/2018


    Tropical Cyclone Warning

    At 181200 UTC, Tropical Depression Toraji (1827) has weakened into an area of low pressure.

    No further warnings on this area of low pressure will be issued by the Hong Kong Observatory unless regeneration takes place.



    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 19/Nov/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.8 C
Minimum Air Temperature                     22.7 C
Grass Minimum Temperature                   22.3 C
Relative Humidity                        77 - 89 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2087.6 mm
Against an average of                     2359.8 mm

Other Stations                Min                  Max
King's Park                  22.0 C               26.1 C
Wong Chuk Hang               22.3 C               27.4 C
Ta Kwu Ling                  22.2 C               27.6 C
Lau Fau Shan                 21.4 C               30.5 C
Tai Po                       22.0 C               24.7 C
Sha Tin                      22.4 C               25.4 C
Tuen Mun                     22.9 C               27.1 C
Tseung Kwan O                21.9 C               25.6 C
Sai Kung                     22.5 C               24.9 C
Cheung Chau                  22.2 C               27.4 C
Chek Lap Kok                 23.0 C               29.5 C
Tsing Yi                     22.9 C               27.5 C
Shek Kong                    22.2 C               28.7 C
Tsuen Wan Ho Koon            21.5 C               27.1 C
Tsuen Wan Shing Mun Valley   22.3 C               26.5 C
Hong Kong Park               22.6 C               26.1 C
Shau Kei Wan                 22.1 C               24.2 C
Kowloon City                 21.8 C               27.2 C
Happy Valley                 22.7 C               28.1 C
Wong Tai Sin                 22.1 C               27.0 C
Stanley                      22.2 C               25.0 C
Kwun Tong                    21.8 C               25.1 C
Sham Shui Po                 22.6 C               28.0 C
Kai Tak Runway Park          22.6 C               25.1 C
Yuen Long Park               22.2 C               29.6 C
Tai Mei Tuk               22.0 C               26.7 C

Duration of sunshine (King's Park):              4.5 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
 

Yesterday's (18 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 18 Nov
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