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Bulletin issued at 21:02 HKT 25/Oct/2018

At 9 p.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 82 per cent.

The air temperatures at other places were:

King's Park 24 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 23 degrees;
Tai Po 23 degrees;
Sha Tin 24 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 24 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 25 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 24 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 24 degrees;
Stanley 24 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 25 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 25 Oct

Regional Weather in Hong Kong

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

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Bulletin updated at 20:45 HKT 25/Oct/2018

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

An easterly airstream is affecting the coastal areas of Guangdong. Meanwhile, pressure is rising over central China. A cold front is expect to form and reach the south China coast tomorrow night.

At 8 p.m., Super Typhoon Yutu was centred about 400 kilometres northwest of Guam. It is forecast to move west-northwest at about 18 kilometres per hour across the western North Pacific in the general direction of the seas east of Luzon.

Weather forecast for tonight and tomorrow

Mainly cloudy. Sunny periods tomorrow. Visibility relatively low in some areas. Temperatures will range between 24 and 28 degrees. Light winds, becoming moderate northerlies and there will be one or two rain patches tomorrow night.

Outlook : Winds strengthening from the north on Saturday. Fine and dry early next week, and cooler in the morning and at night.


(The above forecast period is valid up to 23:59 HKT tomorrow, 26/10/2018; 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 21:00 HKT 25/Oct/2018

N0 WARNING.

GENERAL SITUATION AT 250900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 251300 UTC:

HONG KONG= E 3-4, N TO NE UP TO 6 LATER. DOWN TO 4000 M IN SOME HAZE. A FEW RAIN PATCHES LATER. SEA UP TO 3 M LATER. TEMP 24-28 C. =
KWANGTUNG= E 4-5, N TO NE UP TO 7 LATER. FINE. RAIN PATCHES LATER. SEA UP TO 4 M. SWELL E UP TO 2 M. =
TAIWAN STRAIT= NE 5-6, UP TO 7 LATER. FINE. RAIN PATCHES LATER. SEA UP TO 4 M. SWELL NE UP TO 2 M. =
BASHI= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E UP TO 2 M. =
PRATAS= E TO NE 4-5, OCNL 6. RAIN PATCHES. SEA UP TO 3 M. SWELL E UP TO 2 M. =
BALINTANG= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E UP TO 2 M. =
SCARBOROUGH= E TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL NE UP TO 2 M. =
PARACEL= E 4-5, N TO NE UP TO 6 LATER. LGT RAIN PATCHES. SEA UP TO 3 M. =
TONKIN= E 4-5, N TO NE UP TO 6 LATER. LGT RAIN PATCHES. SEA UP TO 3 M. =
DANANG= E TO NE 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 19:30 HKT 25/Oct/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 25 October 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters. Meanwhile, pressure is rising over central China. A cold front is expect to form and reach the south China coastal waters later.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 3 to 4, becoming north to northeast up to force 6 later.
    Visibility relatively low in some areas. One or two rain patches later.
    Slight to moderate seas, becoming rough later.

    Nan'ao and Shanwei:
    East force 4 to 5, becoming north to northeast up to force 7 later.
    Moderate seas, becoming rough later.

    South of Hong Kong and Shangchuan Dao:
    East force 4 to 5, becoming north to northeast up to force 6 later.
    Moderate seas, becoming rough later.

    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 east force 3
      Visibility 14 Kilometres

    Shantou Wind southeast force 1
      Visibility 21 Kilometres

    Dongsha Wind north-northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind east-southeast force 1
      Visibility 9 Kilometres

    Xisha Wind northeast force 2
      Visibility 30 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 17:30 HKT 25/OCT/2018
    (Next update at 01:30 HKT 26/OCT/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/5-10
       OFFSHORE:  090/10-15                            26-24
   B.   2000 FT:  110/10                               19
   C.   5000 FT:  360/10                               16
   D.  10000 FT:  300/20                               10
   E.  18000 FT:  260/25                               MS3
   F.  24000 FT:  250/30                               MS15
   G.  30000 FT:  250/30                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 5000 FT
   K. VISIBILITY    : 8 KM.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE EASTERLY WINDS. MAINLY CLOUDY,
     SUNNY PERIODS DURING THE DAY. LOCALISED
     MIST/HAZE.=

    ===================================================================
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 12:30 HKT on 20 Oct 18

    VHHK SIGMET 1 VALID 200040/200440 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1706 E11418 - N1642 E11400 - N1930 E11130 - N2042 E11130 - N2012 E11242 - N1706 E11418 TOP FL450 MOV WNW 10KT NC= VHHK SIGMET 2 VALID 200440/200840 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1718 E11430 - N1642 E11400 - N1930 E11130 - N2042 E11130 - N2024 E11300 - N1718 E11430 TOP FL480 MOV NW 05KT 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/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.4 C
Minimum Air Temperature                     24.0 C
Grass Minimum Temperature                   23.1 C
Relative Humidity                        74 - 86 Percent
Rainfall                                      trace 
Total rainfall since 1st January          2077.6 mm
Against an average of                     2322.5 mm

Other Stations                Min                  Max
King's Park                  23.3 C               27.5 C
Wong Chuk Hang               23.3 C               27.5 C
Ta Kwu Ling                  22.0 C               27.6 C
Lau Fau Shan                 22.0 C               27.3 C
Tai Po                       21.9 C               25.3 C
Sha Tin                      23.1 C               27.2 C
Tuen Mun                     23.1 C               26.5 C
Tseung Kwan O                22.1 C               26.2 C
Sai Kung                     22.9 C               25.9 C
Cheung Chau                  22.0 C               29.1 C
Chek Lap Kok                 23.6 C               27.7 C
Tsing Yi                     24.0 C               27.2 C
Shek Kong                    22.9 C               26.8 C
Tsuen Wan Ho Koon            22.1 C               26.8 C
Tsuen Wan Shing Mun Valley   22.8 C               26.4 C
Hong Kong Park               23.3 C               27.2 C
Shau Kei Wan                 22.5 C               26.1 C
Kowloon City                 23.1 C               28.3 C
Happy Valley                 23.4 C               27.7 C
Wong Tai Sin                 22.9 C               27.0 C
Stanley                      22.7 C               26.4 C
Kwun Tong                    22.5 C               26.7 C
Sham Shui Po                 23.3 C               28.2 C
Kai Tak Runway Park          23.4 C               26.0 C
Yuen Long Park               22.7 C               27.5 C
Tai Mei Tuk               22.9 C               26.7 C

Duration of sunshine (King's Park):              4.5 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 (24 Oct 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                         0.14
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 Oct
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Oct 2018> 

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