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Bulletin issued at 17:02 HKT 20/Nov/2018

At 5 p.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 77 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.5. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 24 degrees;
Tai Po 22 degrees;
Sha Tin 23 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 23 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 23 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 23 degrees;
Kwun Tong 22 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 24 degrees;
Tai Mei Tuk 23 degrees.


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


Climatological Information for 20 Nov

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 16:45 HKT 20/Nov/2018

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

The northeast monsoon is affecting southern China. Meanwhile, pressure over northern China is rising. A replenishment of the northeast monsoon is expected to reach the south China coastal areas tomorrow night.

At 4 p.m., the tropical depression to the east of the Philippines was centred about 790 kilometres southeast of Manila. It is forecast to move west at about 25 kilometres per hour across the central to southern parts of the Philippines.

Weather forecast for tonight and tomorrow

Mainly cloudy. Sunny intervals tomorrow afternoon. The maximum temperature will be about 25 degrees. A few rain patches and relatively low visibility later. Moderate easterly winds, becoming northerlies tomorrow night with temperatures falling to around 21 degrees at midnight.

Outlook : Becoming cool appreciably on Thursday. Dry with sunny periods in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 21/11/2018; 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 20/Nov/2018

GALE WARNING AREAS: TAIWAN STRAIT AND BASHI.

GENERAL SITUATION AT 192100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. LOW 1006 HPA 10N 128E W 14KT INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= E TO NE 5-6, OCNL 7. RAIN PATCHES. SEA UP TO 4 M. SWELL E 2 M. TEMP 25-22 C. =
KWANGTUNG= E TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL E 2 M. =
TAIWAN STRAIT= NE 6-7, OCNL 8. LGT RAIN PATCHES. SEA UP TO 6 M. SWELL NE 2-3 M. =
BASHI= E TO NE 6-7, OCNL 8. LGT RAIN PATCHES. SEA UP TO 6 M. SWELL E TO NE 3 M. =
PRATAS= E TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL E 2 M. =
BALINTANG= E TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL E TO NE 3 M. =
SCARBOROUGH= E TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL E TO NE 2 M. =
PARACEL= E TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL E 2 M. =
TONKIN= E TO SE 4-5. LGT RAIN PATCHES. SEA UP TO 2 M. =
DANANG= E TO SE 4-5. LGT RAIN PATCHES. SEA 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
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 16:30 HKT 20/Nov/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 20 November 2018

    Warnings:
    Strong winds in all areas.

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

    At 4 p.m., the tropical depression to the east of the Philippines with maximum sustained winds of about 45 kilometres per hour near its centre was located near 10.5 degrees north, 127.0 degrees east. It is forecast to move west at about 25 kilometres per hour across the central to southern parts of the Philippines.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6, occasionally force 7.
    Misty and a few rain patches later.
    Moderate to rough seas.

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

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

    Outlook for the next 48 hours
    Easterly winds of force 5 to 6, becoming northerly winds of up to force 8.

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

    Waglan Island Wind east-northeast force 5
      Visibility 21 Kilometres

    Shantou Wind east force 2
      Visibility 30 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind east force 3
      Visibility 14 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
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  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 20/NOV/2018
    (Next update at 01:30 HKT 21/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 SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
       OFFSHORE:  090/15-20 OCNL 25                    24-21
   B.   2000 FT:  090/15-20                            17
   C.   5000 FT:  200/10                               14
   D.  10000 FT:  260/20                               9
   E.  18000 FT:  270/30                               MS4
   F.  24000 FT:  290/40                               MS17
   G.  30000 FT:  270/50                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3800-4200 FT
   I. WEATHER       : 
      MAINLY CLOUDY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 2500 FT
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9600 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 EASTERLY WINDS,STRONG
     OFFSHORE. SUNNY INTERVALS.=

    ===================================================================
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

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    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 20/Nov/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.8 C
Minimum Air Temperature                     22.0 C
Grass Minimum Temperature                   21.4 C
Relative Humidity                        62 - 88 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2087.6 mm
Against an average of                     2360.9 mm

Other Stations                Min                  Max
King's Park                  21.3 C               27.2 C
Wong Chuk Hang               22.5 C               27.3 C
Ta Kwu Ling                  20.0 C               27.2 C
Lau Fau Shan                 20.3 C               28.4 C
Tai Po                       20.4 C               24.2 C
Sha Tin                      21.0 C               25.9 C
Tuen Mun                     21.2 C               27.9 C
Tseung Kwan O                19.7 C               27.7 C
Sai Kung                     20.4 C               25.6 C
Cheung Chau                  20.5 C               28.5 C
Chek Lap Kok                 21.7 C               25.2 C
Tsing Yi                     22.1 C               27.0 C
Shek Kong                    20.6 C               27.3 C
Tsuen Wan Ho Koon            19.9 C               27.2 C
Tsuen Wan Shing Mun Valley   21.3 C               27.8 C
Hong Kong Park               22.4 C               27.4 C
Shau Kei Wan                 20.9 C               27.7 C
Kowloon City                 20.8 C               27.8 C
Happy Valley                 22.5 C               27.8 C
Wong Tai Sin                 21.5 C               27.7 C
Stanley                      21.9 C               26.5 C
Kwun Tong                    21.5 C               27.5 C
Sham Shui Po                 21.5 C               28.9 C
Kai Tak Runway Park          22.3 C               27.9 C
Yuen Long Park               20.5 C               27.4 C
Tai Mei Tuk               20.2 C               27.1 C

Duration of sunshine (King's Park):              6.4 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 (19 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 19 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Nov 2018> 

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