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Bulletin issued at 03:02 HKT 24/Jan/2018

At 3 a.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 76 per cent.

The air temperatures at other places were:

King's Park 17 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 17 degrees;
Lau Fau Shan 18 degrees;
Tai Po 17 degrees;
Sha Tin 18 degrees;
Tuen Mun 18 degrees;
Tseung Kwan O 17 degrees;
Sai Kung 17 degrees;
Cheung Chau 17 degrees;
Chek Lap Kok 19 degrees;
Tsing Yi 18 degrees;
Shek Kong 18 degrees;
Tsuen Wan Ho Koon 16 degrees;
Tsuen Wan Shing Mun Valley 17 degrees;
Hong Kong Park 17 degrees;
Shau Kei Wan 17 degrees;
Kowloon City 17 degrees;
Happy Valley 18 degrees;
Wong Tai Sin 17 degrees;
Stanley 17 degrees;
Kwun Tong 17 degrees;
Sham Shui Po 18 degrees;
Kai Tak Runway Park 18 degrees;
Yuen Long Park 18 degrees;
Tai Mei Tuk 17 degrees.


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


Climatological Information for 24 Jan

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 02:45 HKT 24/Jan/2018

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

An easterly airstream is affecting the coast of Guangdong.

Weather forecast for today

Mainly cloudy. One or two light rain patches in the morning and at night. Bright periods during the day. Temperatures will range between 16 and 19 degrees. Moderate to fresh easterly winds, occasionally strong offshore.

Outlook : Windy and cooler in the following couple of days. It will turn appreciably cold early next week.


(The above forecast period is valid up to 23:59 HKT today, 24/01/2018; 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 23/Jan/2018

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

GENERAL SITUATION AT 230900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 231300 UTC:

HONG KONG= E 5-6, OCNL 7. LGT RAIN PATCHES. DOWN TO 4000 M IN SOME HAZE AT FIRST. SEA UP TO 4 M. SWELL E UP TO 2 M. TEMP 16-19 C. =
KWANGTUNG= E 6-7, OCNL 8 IN E. LGT RAIN PATCHES. SEA 3-4 M, UP TO 6 M IN E. SWELL E TO NE 2 M. =
TAIWAN STRAIT= NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= E 7-8. RAIN PATCHES. SEA 4-6 M. SWELL E TO NE 2-3 M. =
PRATAS= E TO NE 6-7, OCNL 8. RAIN PATCHES. SEA UP TO 6 M. SWELL E TO NE 2 M. =
BALINTANG= E 7-8. RAIN PATCHES. SEA 4-6 M. SWELL E TO NE 2-3 M. =
SCARBOROUGH= E TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2 M. =
PARACEL= E 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL E TO NE 2 M. =
TONKIN= E TO SE 5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA 2 M. =
DANANG= E 5-6. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 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

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    Bulletin issued at 03:30 HKT 24/Jan/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 24 January 2018

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

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6, occasionally force 7.
    A few light rain patches.
    Moderate to rough seas.

    Nan'ao:
    East force 6 to 7, occasionally force 8.
    Rough to very rough seas.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    East force 6 to 7.
    Rough seas.

    Outlook for the next 48 hours
    Easterly winds of force 6 to 7, occasionally force 8.

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

    Waglan Island Wind east-northeast force 6
      Visibility 10 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 18 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind east force 3
      Visibility 8 Kilometres

    Xisha Wind east-northeast force 1
      Visibility 17 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 01:30 HKT 24/JAN/2018
    (Next update at 9:00-9:30 HKT 24/JAN/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERN AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
       OFFSHORE:  090/15-20 OCNL 25                    19-16
   B.   2000 FT:  070/15-20                            14
   C.   5000 FT:  320/10                               13
   D.  10000 FT:  250/30                               7
   E.  18000 FT:  290/30                               0
   F.  24000 FT:  300/30                               MS14
   G.  30000 FT:  270/40                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3700-4600 FT
   I. WEATHER       : 
      MAINLY CLOUDY.  ONE OR TWO LIGHT RAIN PATCHES.
      LOCALISED MIST/HAZE
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 4000 FT
   K. VISIBILITY    : 8 KM.  TEMPO 4000 M IN RAIN/MIST/HAZE.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 6200 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     FRESH EASTERLY WINDS, OCCASIONALLY STRONG
     OFFSHORE.  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.

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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 20:11 HKT on 01 Dec 17

    VHHK SIGMET 4 VALID 010820/011220 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1642 E11400 - N1736 E11312 - N1812 E11512 - N1642 E11400 TOP FL450 MOV W 05KT NC= VHHK SIGMET 5 VALID 011220/011620 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1806 E11506 - N1642 E11400 - N1712 E11330 - N1818 E11448 - N1806 E11506 TOP FL420 MOV W 05KT WKN=

    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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
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    Bulletin issued at 15:30 HKT 04/Jan/2018


    Tropical Cyclone Warning

    At 040600 UTC, Tropical Depression Bolaven (1801) has weakened into an area of low pressure.

    No further warnings on this area of low pressure will be issued by the Hong Kong Observatory unless regeneration takes place.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

    Tropical Cyclone Track
    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 24/Jan/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     22.8 C
Minimum Air Temperature                     17.2 C
Grass Minimum Temperature                   16.3 C
Relative Humidity                        67 - 86 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January            42.6 mm
Against an average of                       17.5 mm

Other Stations                Min                  Max
King's Park                  16.7 C               22.2 C
Wong Chuk Hang               17.1 C               22.6 C
Ta Kwu Ling                  16.8 C               21.8 C
Lau Fau Shan                 15.7 C               21.1 C
Tai Po                       17.1 C               20.3 C
Sha Tin                      17.1 C               21.4 C
Tuen Mun                     17.0 C               21.8 C
Tseung Kwan O                16.7 C               21.7 C
Sai Kung                     17.0 C               19.8 C
Cheung Chau                  16.8 C               21.6 C
Chek Lap Kok                 17.9 C               22.2 C
Tsing Yi                     17.5 C               21.9 C
Shek Kong                    16.7 C               22.3 C
Tsuen Wan Ho Koon            15.6 C               21.0 C
Tsuen Wan Shing Mun Valley   17.0 C               22.0 C
Hong Kong Park               17.4 C               21.3 C
Shau Kei Wan                 16.4 C               19.8 C
Kowloon City                 16.4 C               21.9 C
Happy Valley                 17.5 C               22.6 C
Wong Tai Sin                 16.7 C               22.2 C
Stanley                      16.8 C               20.2 C
Kwun Tong                    16.3 C               22.1 C
Sham Shui Po                 17.3 C               22.9 C
Kai Tak Runway Park          17.3 C               20.5 C
Yuen Long Park               16.1 C               22.3 C
Tai Mei Tuk               16.6 C               22.0 C

Duration of sunshine (King's Park):              4.7 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 5.
Sea surface temperature (Waglan Island):        17.0 C 

Yesterday's (23 Jan 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                           0.08
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                           0.12
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 23 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <24 Jan 2018> 

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