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Bulletin issued at 17:02 HKT 25/Oct/2019

At 5 p.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 71 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.

The air temperatures at other places were:

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


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


Climatological Information for 25 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 16:45 HKT 25/Oct/2019

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

A dry northeast monsoon is bringing generally fine weather to the coast of Guangdong. Locally, the relative humidity over the territory fell below 70 per cent in the afternoon.

Weather forecast for tonight and tomorrow

Mainly fine. Dry during the day tomorrow. Temperatures will range between 24 and 28 degrees. Moderate east to northeasterly winds, occasionally fresh offshore.

Outlook : Sunny periods in the following couple of days. Becoming cooler on Monday night.


(The above forecast period is valid up to 23:59 HKT tomorrow, 26/10/2019; 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/Oct/2019

N0 WARNING.

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

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= E TO NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. TEMP 29-24 C. =
KWANGTUNG= E TO NE 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. =
TAIWAN STRAIT= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
BASHI= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
PRATAS= NE 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. SWELL NE 2 M. =
BALINTANG= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
SCARBOROUGH= NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. ISOL SHOWERS AND TS. 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 25/Oct/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 25 October 2019

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Shanwei and South of Hong Kong:
    East to northeast force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 4 to 5, occasionally force 6.

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

    Waglan Island Wind east-northeast force 5
      Visibility 22 Kilometres

    Shantou Wind east force 2
      Visibility 29 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind east force 3
      Visibility 15 Kilometres

    Xisha Wind east force 3
      Visibility 29 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 17:30 HKT 25/OCT/2019
    (Next update at 01:30 HKT 26/OCT/2019)
    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:  080/10, OCNL 15
       OFFSHORE:  080/15-20, OCNL 25                   29-24
   B.   2000 FT:  080/15-20                            20
   C.   5000 FT:  060/15                               17
   D.  10000 FT:  320/15                               10
   E.  18000 FT:  280/20                               MS3
   F.  24000 FT:  290/20                               MS14
   G.  30000 FT:  300/25                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE. MOD NEAR HILLS.
   N. SEA STATE     : 2.0-3.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS,
     OCCASIONALLY FRESH OFFSHORE. MAINLY FINE.=

    ===================================================================
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/Oct/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.5 C
Minimum Air Temperature                     24.5 C
Grass Minimum Temperature                   23.7 C
Relative Humidity                        55 - 79 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2322.5 mm

Other Stations                Min                  Max
King's Park                  23.9 C               28.9 C
Wong Chuk Hang               24.5 C               29.0 C
Ta Kwu Ling                  22.3 C               30.3 C
Lau Fau Shan                 22.6 C               30.7 C
Tai Po                       23.7 C               28.4 C
Sha Tin                      23.3 C               28.9 C
Tuen Mun                     23.8 C               29.3 C
Tseung Kwan O                23.4 C               28.5 C
Sai Kung                     24.1 C               28.2 C
Cheung Chau                  23.6 C               29.5 C
Chek Lap Kok                 24.9 C               30.4 C
Tsing Yi                     24.6 C               30.1 C
Shek Kong                    23.3 C               30.2 C
Tsuen Wan Ho Koon            22.1 C               29.0 C
Tsuen Wan Shing Mun Valley   23.2 C               29.5 C
Hong Kong Park               24.4 C               29.6 C
Shau Kei Wan                 23.8 C               28.5 C
Kowloon City                 23.7 C               29.8 C
Happy Valley                 24.5 C               29.4 C
Wong Tai Sin                 24.1 C               29.2 C
Stanley                      24.5 C               28.4 C
Kwun Tong                    23.7 C               28.4 C
Sham Shui Po                 24.2 C               30.3 C
Kai Tak Runway Park          24.7 C               28.3 C
Yuen Long Park               23.7 C               30.7 C
Tai Mei Tuk               23.4 C               29.9 C

Duration of sunshine (King's Park):              8.7 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 7.
 

Yesterday's (24 Oct 2019) 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                               0.11
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                        0.14

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 24 Oct
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Oct 2019> 

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