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Bulletin issued at 11:31 HKT 25/Nov/2019

At 11 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 70 per cent.
During the past hour the mean UV Index recorded at King's Park was 4. The intensity of UV radiation was moderate.

Please be reminded that:

The Strong Monsoon Signal was issued at 11:30 a.m.

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 28 degrees;
Tai Po 25 degrees;
Sha Tin 26 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 24 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 25 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 27 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 26 degrees;
Stanley 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 27 degrees.


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


Climatological Information for 25 Nov

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 11:30 HKT 25/Nov/2019

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

Pressure is rising over inland Guangdong. The northeast monsoon affecting the region is expected to strengthen gradually today.

Weather forecast for today

Mainly fine and dry. Becoming cloudy with one or two light rain patches tonight. Moderate to fresh northeasterly winds, strong offshore.

Outlook : Cooler and windy with one or two rain patches in the next couple of days. Temperatures dropping further with cool mornings in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 25/11/2019; 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 25/Nov/2019

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS AND BALINTANG.

GENERAL SITUATION AT 242100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= NE 5-6. LIGHT RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 2 M. TEMP 26-19 C. =
KWANGTUNG= NE 5-6, 7-8 LATER. LIGHT RAIN PATCHES. SEA 2-3 M, 4-6 M LATER. SWELL E TO NE 3 M. =
TAIWAN STRAIT= NE 7-8, OCNL 9. LIGHT RAIN PATCHES. SEA UP TO 8 M. SWELL NE 3-4 M. =
BASHI= NE 5-6, BEC 7-8. ISOL SHOWERS. SEA 2-3 M, BEC 4-6 M. SWELL E TO NE 3 M. =
PRATAS= NE 5-6, 7-8 LATER. ISOL SHOWERS. SEA 2-3 M, 4-6 M LATER. SWELL E TO NE 3 M. =
BALINTANG= NE 5-6, 7-8 LATER. ISOL SHOWERS. SEA 2-3 M, 4-6 M LATER. SWELL E TO NE 3 M. =
SCARBOROUGH= NE 5-6. CLD. SEA UP TO 2-3 M. SWELL NE 3 M. =
PARACEL= NE 4-5, 6-7 LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M, 3-4 M LATER. SWELL E TO NE 3 M. =
TONKIN= N TO NE 5-6. CLD. SEA 2-3 M. =
DANANG= NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 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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  • 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 09:30 HKT 25/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 25 November 2019

    Warnings:
    Gale force winds in Nan'ao, Shanwei and south of Hong Kong. Strong winds in Hong Kong adjacent waters and Shangchuan Dao.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 5 to 6, occasionally force 7.
    One or two rain patches.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    Northeast force 6 to 7, becoming force 8.
    Rough seas, becoming very rough.

    South of Hong Kong:
    Northeast force 5 to 6, becoming force 7 to 8.
    Moderate to rough seas, becoming rough to very rough.

    Shangchuan Dao:
    Northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 7 to 8.

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

    Waglan Island Wind east-northeast force 6
      Visibility 30 Kilometres

    Shantou Wind east force 1
      Visibility 11 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 7

    Macau Wind north-northeast force 2
      Visibility 2600 Metres in mist

    Xisha Wind east-northeast force 2
      Visibility 3800 Metres in rain

  • Explanation of Seas or Sea Waves
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  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 25/NOV/2019
    (Next update at 12:30 HKT 25/NOV/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     PRESSURE IS RISING OVER INLAND GUANGDONG. THE
     NORTHEAST MONSOON AFFECTING THE REGION IS
     EXPECTED TO STRENGTHEN GRADUALLY TODAY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/10-15
       OFFSHORE:  070/25-30                            25-28
   B.   2000 FT:  070/20-25                            20
   C.   5000 FT:  070/15                               15
   D.  10000 FT:  200/15                               5
   E.  18000 FT:  270/20                               MS3
   F.  24000 FT:  290/25                               MS15
   G.  30000 FT:  280/30                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      SUNNY PERIODS. LOCALISED HAZE OR MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 4000 FT.
   K. VISIBILITY    : 8 KM. TEMPO 2500 M IN HAZE/MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 7200 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 4.0-5.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE. CLOUDY PERIODS.
     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

    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 25/Nov/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.4 C
Minimum Air Temperature                     21.1 C
Grass Minimum Temperature                   18.4 C
Relative Humidity                        60 - 86 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2365.2 mm

Other Stations                Min                  Max
King's Park                  20.0 C               28.4 C
Wong Chuk Hang               18.2 C               27.7 C
Ta Kwu Ling                  15.4 C               29.8 C
Lau Fau Shan                 18.8 C               29.8 C
Tai Po                       18.6 C               27.3 C
Sha Tin                      17.7 C               27.8 C
Tuen Mun                     19.5 C               28.9 C
Tseung Kwan O                18.1 C               28.3 C
Sai Kung                     19.5 C               26.6 C
Cheung Chau                  19.0 C               29.2 C
Chek Lap Kok                 20.1 C               27.7 C
Tsing Yi                     19.1 C               28.4 C
Shek Kong                    16.7 C               28.6 C
Tsuen Wan Shing Mun Valley   17.3 C               28.7 C
Hong Kong Park               19.7 C               28.7 C
Shau Kei Wan                 19.6 C               27.3 C
Kowloon City                 20.1 C               29.7 C
Happy Valley                 18.0 C               28.1 C
Wong Tai Sin                 19.5 C               29.2 C
Stanley                      20.2 C               26.9 C
Kwun Tong                    20.1 C               27.2 C
Sham Shui Po                 19.5 C               29.9 C
Kai Tak Runway Park          20.5 C               27.0 C
Yuen Long Park               17.0 C               29.5 C
Tai Mei Tuk               19.3 C               28.5 C

Duration of sunshine (King's Park):              9.9 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 (24 Nov 2019) 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                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
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 24 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Nov 2019> 

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