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Bulletin issued at 13:02 HKT 25/Oct/2016

At 1 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 8. The intensity of UV radiation was very high.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 30 degrees;
Tai Po 27 degrees;
Sha Tin 29 degrees;
Tuen Mun 30 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 27 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 31 degrees;
Shek Kong 30 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 28 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 28 degrees;
Yuen Long Park 31 degrees.

Between 11:45 a.m. and 12:45 p.m., the rainfall recorded in various regions were:

Kwun Tong 0 to 1 mm.


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


Local Weather Forecast
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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 12:45 HKT 25/Oct/2016

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

An easterly airstream is affecting the coast of Guangdong.

Weather forecast for this afternoon and tonight

Sunny periods and isolated showers. Mainly cloudy tonight. Moderate easterly winds.

Outlook : Mainly fine in the next few days. Becoming cooler with a few rain patches during the weekend.


(The above forecast period is valid up to 23:59 HKT today, 25/10/2016; 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/2016

N0 WARNING.

GENERAL SITUATION AT 242100 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. TEMP 25-29 C. =
KWANGTUNG= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 4-5. CLD. SEA UP TO 2 M. =
BASHI= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. =
PRATAS= E TO NE 4-5. FINE. SEA UP TO 2 M. =
BALINTANG= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. =
SCARBOROUGH= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= E TO SE 4-5. ISOL SHOWERS AND SQUALLY TS. SEA UP TO 2 M. =
TONKIN= SE 4-5. ISOL SHOWERS AND SQUALLY TS. SEA UP TO 2 M. =
DANANG= SE 4-5. ISOL SHOWERS AND SQUALLY 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 12:30 HKT 25/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 25 October 2016

    Weather Situation:
    An easterly airstream is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5.
    A few showers.
    Moderate seas.

    Nan'ao:
    East to northeast force 4 to 5.
    Moderate seas.

    Shanwei:
    East to northeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    South of Hong Kong:
    East force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

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

    Outlook for the next 48 hours
    Easterly winds of force 4 to 5.

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

    Waglan Island Wind east-northeast force 4
      Visibility 12 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 20 Kilometres

    Dongsha Wind northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 3

    Xisha Wind east force 3
      Visibility 23 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 25/OCT/2016
    (Next update at 17:30 HKT 25/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COAST OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/5-10                             27-30
   B.   2000 FT:  140/10-15                            22
   C.   5000 FT:  180/10                               18
   D.  10000 FT:  170/15                               10
   E.  18000 FT:  180/15                               MS5
   F.  24000 FT:  190/15                               MS15
   G.  30000 FT:  200/15                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      SUNNY PERIODS WITH A FEW ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS. 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.

    sigmet
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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.

    The latest significant weather information
    issued by the Hong Kong Observatory at 02:44 HKT on 24 Oct 16

    VHHK SIGMET 6 VALID 231845/232245 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1942 E11624 - N1700 E11412 - N2100 E11312 - N2124 E11436 - N1942 E11624 TOP FL400 MOV NW 10KT NC=

    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/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.1 C
Minimum Air Temperature                     26.1 C
Grass Minimum Temperature                   25.0 C
Relative Humidity                        82 - 96 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2888.4 mm
Against an average of                     2322.5 mm

Other Stations                Min                  Max
King's Park                  25.3 C               30.0 C
Wong Chuk Hang               24.0 C               29.4 C
Ta Kwu Ling                  24.9 C               31.0 C
Lau Fau Shan                 24.6 C               29.7 C
Tai Po                       24.8 C               28.4 C
Sha Tin                      24.5 C               29.4 C
Tuen Mun                     25.5 C               30.4 C
Tseung Kwan O                24.8 C               29.7 C
Sai Kung                     25.3 C               29.4 C
Cheung Chau                  25.2 C               28.6 C
Chek Lap Kok                 26.8 C               31.4 C
Tsing Yi                     24.8 C               31.7 C
Shek Kong                    24.7 C               31.2 C
Tsuen Wan Ho Koon            23.8 C               28.8 C
Tsuen Wan Shing Mun Valley   24.1 C               31.7 C
Hong Kong Park               24.9 C               29.5 C
Shau Kei Wan                 25.2 C               29.3 C
Kowloon City                 25.4 C               30.4 C
Happy Valley                 24.9 C               31.5 C
Wong Tai Sin                 25.1 C               30.6 C
Stanley                      25.4 C               29.2 C
Kwun Tong                    25.8 C               29.7 C
Sham Shui Po                 25.8 C               31.0 C
Kai Tak Runway Park          26.1 C               29.6 C
Yuen Long Park               24.7 C               31.1 C

Duration of sunshine (King's Park):              4.1 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 8.
 

Yesterday's (24 Oct 2016) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                           0.08
Tap Mun                             0.08
Kat O                               0.09
Yuen Ng Fan                         0.11
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 during
the period 1987-2015, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 24 Oct
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Oct 2016> 

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