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Bulletin issued at 09:06 HKT 22/Nov/2018

At 9 a.m. at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 67 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.6. The intensity of UV radiation was low.

Please be reminded that:

The Strong Monsoon Signal was issued at 9:05 a.m.

The air temperatures at other places were:

King's Park 18 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 18 degrees;
Lau Fau Shan 18 degrees;
Tai Po 18 degrees;
Sha Tin 18 degrees;
Tuen Mun 19 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 18 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 19 degrees;
Shek Kong 18 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 19 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 18 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 18 degrees;
Stanley 20 degrees;
Kwun Tong 19 degrees;
Sham Shui Po 19 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 18 degrees;
Tai Mei Tuk 18 degrees.

Between midnight and 9 a.m. the minimum temperature was 18.8 degrees Celsius at the Hong Kong Observatory.

Here is the information on Tropical Depression at 9 a.m.:
Location: 10.8 degrees north, 117.2 degrees east.


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


Climatological Information for 22 Nov

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 09:10 HKT 22/Nov/2018

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

Under the influence of the northeast monsoon, it was appreciably cooler over the coastal areas of Guangdong this morning. Locally, temperatures were generally 3 to 4 degrees lower than those of yesterday.

At 8 a.m., the tropical depression over the South China Sea was centred about 390 kilometres east of Nansha Dao. It is forecast to move west at about 22 kilometres per hour across the southern part of the South China Sea.

Weather forecast for today

Dry and appreciably cooler. Sunny periods with a maximum temperature of about 23 degrees. Moderate to fresh north to northeasterly winds, strong offshore and on high ground at first.

Outlook : Mainly fine and dry in the next couple of days. Becoming cloudy with rain early next week.


(The above forecast period is valid up to 23:59 HKT today, 22/11/2018; 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 22/Nov/2018

GALE WARNING AREAS: HONG KONG, KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG, PARACEL AND DANANG.

GENERAL SITUATION AT 212100 UTC:
NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. FOR DETAILS ON TROPICAL DEPRESSION OVER THE PHILIPPINES, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 220100 UTC:

HONG KONG= N 6-7, OCNL 8 AT FIRST. CLD. SEA 4-6 M. SWELL NE 2 M. TEMP 23-18 C. =
KWANGTUNG= N 6-7, OCNL 8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 7-8. RAIN PATCHES. SEA 5-6 M. SWELL NE 2-3 M. =
BASHI= NE 7-8. ISOL SHOWERS. SEA 5-6 M. SWELL NE 2-3 M. =
PRATAS= NE 7-8. ISOL SHOWERS. SEA 5-6 M. SWELL NE 2-3 M. =
BALINTANG= NE 7-8. ISOL SHOWERS. SEA 5-6 M. SWELL NE 2-3 M. =
SCARBOROUGH= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-5 M. SWELL NE 2-3 M. =
PARACEL= NE 7-8. ISOL SHOWERS. SEA 5-6 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 6-7. RAIN PATCHES. SEA 3-5 M. SWELL NE 2 M. =
DANANG= NE 6-7, OCNL 8. ISOL SHOWERS. 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 09:30 HKT 22/Nov/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 22 November 2018

    Warnings:
    Gale force winds in all areas.

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

    At 9 a.m., the tropical depression over the South China Sea with maximum sustained winds of about 55 kilometres per hour near its centre was located near 10.8 degrees north, 117.2 degrees east. It is forecast to move west at about 20 kilometres per hour across the southern part of the South China Sea.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 6 to 7, occasionally force 8 at first.
    Rough to very rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    North to northeast force 6 to 7, occasionally force 8 at first.
    Rough to very rough seas.

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

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

    Waglan Island Wind north force 6
      Visibility 28 Kilometres

    Shantou Wind southwest force 1
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 6

    Macau Wind north force 4
      Visibility 30 Kilometres

    Xisha Wind northeast force 4
      Visibility 19 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 09:00 HKT 22/NOV/2018
    (Next update at 12:30 HKT 22/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 COASTAL
     AREAS OF GUANGDONG.
     AT 9 A.M., THE TROPICAL DEPRESSION OVER THE
     SOUTH CHINA SEA WAS CENTRED NEAR 10.8 DEGREES
     NORTH, 117.2 DEGREES EAST.  IT IS FORECAST TO
     MOVE WEST AT ABOUT 12 KNOTS ACROSS THE SOUTHERN
     PART OF THE SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/15, OCNL 20
       OFFSHORE:  020/25                               18-23
   B.   2000 FT:  020/25                               15
   C.   5000 FT:  020/15                               15
   D.  10000 FT:  240/10                               6
   E.  18000 FT:  260/35                               MS5
   F.  24000 FT:  250/45                               MS16
   G.  30000 FT:  260/60                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1800 - 2600, 3100 - 3600 FT.
   I. WEATHER       : 
      SUNNY PERIODS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT  SCT 8000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 7600 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.5-3.5 M     SEA TEMPERATURE    : 24 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTH TO NORTHEASTERLY WINDS, FRESH
     OFFSHORE.  MAINLY CLOUDY.=

    ===================================================================
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 09:30 HKT 22/Nov/2018


    Tropical Cyclone Warning

    At 220000 UTC, the tropical depression over the South China Sea with central pressure 1000 hectopascals was centred within 90 nautical miles of one zero point eight degrees north (10.8 N) one one seven point five degrees east (117.5 E) and is forecast to move west at about 10 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 30 knots.

    Radius of over 2 metre waves 90 nautical miles.

    Forecast position and intensity at 230000 UTC
    One one point one degrees north (11.1 N)
    One one three point two degrees east (113.2 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 240000 UTC
    One zero point five degrees north (10.5 N)
    One one zero point one degrees east (110.1 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 250000 UTC
    One zero point seven degrees north (10.7 N)
    One zero seven point eight degrees east (107.8 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 260000 UTC
    One two point zero degrees north (12.0 N)
    One zero six point three degrees east (106.3 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 270000 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 22/Nov/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.2 C
Minimum Air Temperature                     21.2 C
Grass Minimum Temperature                   21.3 C
Relative Humidity                        71 - 92 Percent
Rainfall                                     2.4 mm 
Total rainfall since 1st January          2090.1 mm
Against an average of                     2364.2 mm

Other Stations                Min                  Max
King's Park                  21.2 C               28.7 C
Wong Chuk Hang               21.1 C               28.3 C
Ta Kwu Ling                  19.6 C               29.1 C
Lau Fau Shan                 19.3 C               27.3 C
Tai Po                       19.8 C               25.7 C
Sha Tin                      20.8 C               27.4 C
Tuen Mun                     20.7 C               28.7 C
Tseung Kwan O                19.0 C               28.9 C
Sai Kung                     20.5 C               26.5 C
Cheung Chau                  20.6 C               29.9 C
Chek Lap Kok                 20.9 C               29.4 C
Tsing Yi                     21.3 C               28.8 C
Shek Kong                    19.8 C               29.2 C
Tsuen Wan Ho Koon            18.7 C               27.9 C
Tsuen Wan Shing Mun Valley   21.1 C               29.8 C
Hong Kong Park               20.1 C               26.9 C
Shau Kei Wan                 20.2 C               27.4 C
Kowloon City                 20.8 C               30.9 C
Happy Valley                 21.8 C               28.9 C
Wong Tai Sin                 20.9 C               30.0 C
Stanley                      20.6 C               27.1 C
Kwun Tong                    20.5 C               29.4 C
Sham Shui Po                 20.7 C               29.8 C
Kai Tak Runway Park          21.2 C               27.4 C
Yuen Long Park               19.6 C               29.4 C
Tai Mei Tuk               19.4 C               29.6 C

Duration of sunshine (King's Park):              8.8 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 (21 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 21 Nov
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