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Bulletin updated at 09:45 HKT 24/Apr/2018

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

A trough of low pressure is crossing the coast of Guangdong, and bringing showers and thunderstorms to the region.

Weather forecast for today

Cloudy with showers. Showers will be heavy at times with thunderstorms in the morning. Showers will ease off in the afternoon. Light winds, becoming moderate northerlies.

Outlook : Mainly cloudy in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 24/04/2018; 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 09:00 HKT 24/Apr/2018

N0 WARNING.

GENERAL SITUATION AT 232100 UTC:
TROUGH 23N 103E 22N 110E 23N 117E 30N 125E SE 5KT.

MARINE FORECAST FOR 24 HOURS FROM 240100 UTC:

HONG KONG= N 5. DOWN TO 2000 M IN ISOL HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. TEMP 26-21 C. =
KWANGTUNG= N TO NE 5-6, S 4-5 IN E AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M LATER. =
TAIWAN STRAIT= N TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL N TO NE 2 M, 3 M LATER. =
BASHI= S 5, BEC N TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3-4 M. SWELL N TO NE 2 M, 3 M LATER. =
PRATAS= S 4-5, BEC N TO NE UP TO 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL N TO NE 2 M LATER. =
BALINTANG= S 5, BEC N TO NE 5-6. ISOL SHOWERS AND TS. SEA 2 M, BEC 3 M. SWELL N TO NE 2 M LATER. =
SCARBOROUGH= S 4-5, BEC N TO NE 4-5. ISOL SHOWERS LATER. SEA UP TO 2 M. SWELL N TO NE 2 M LATER. =
PARACEL= S 4-5, BEC N TO NE UP TO 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 2 M LATER. =
TONKIN= N TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE UP TO 2 M. =
DANANG= S 5, BEC N TO NE 5. ISOL SHOWERS AND TS. SEA 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 09:30 HKT 24/Apr/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 24 April 2018

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

    Weather Situation:
    A trough of low pressure is crossing the coastal waters of Guangdong, and bringing unsettled weather to the region.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 5.
    Isolated squally heavy showers and thunderstorms.
    Moderate seas.

    Nan'ao:
    South force 4 to 5, becoming north to northeast up to force 7.
    Isolated squally showers and thunderstorms.
    Moderate seas, becoming rough.

    Shanwei and South of Hong Kong:
    South force 4 to 5, becoming north to northeast force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate seas, becoming rough.

    Shangchuan Dao:
    North to northeast force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 5 to 6. Isolated showers and thunderstorms.

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

    Waglan Island Wind calm
      Visibility 11 Kilometres

    Shantou Wind west-southwest force 2
      Visibility 20 Kilometres

    Huangmaozhou Wind southeast force 2

    Macau Wind south force 2
      Visibility 8 Kilometres

    Xisha Wind south-southeast force 2
      Visibility 22 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
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    • 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 08:28 HKT on 24 Apr 18

    VHHK SIGMET 1 VALID 240030/240430 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2224 E11630 - N2136 E11324 - N2212 E11306 - N2236 E11412 - N2300 E11630 - N2224 E11630 TOP FL450 MOV SE 15KT WKN=

    Please click here for more about the SIGMET

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    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/Apr/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.2 C
Minimum Air Temperature                     24.3 C
Grass Minimum Temperature                   22.9 C
Relative Humidity                        64 - 91 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           108.9 mm
Against an average of                      297.0 mm

Other Stations                Min                  Max
King's Park                  23.6 C               30.1 C
Wong Chuk Hang               23.7 C               28.2 C
Ta Kwu Ling                  22.6 C               30.7 C
Lau Fau Shan                 22.7 C               29.6 C
Tai Po                       23.3 C               29.8 C
Sha Tin                      23.6 C               30.7 C
Tuen Mun                     23.8 C               30.2 C
Tseung Kwan O                22.7 C               29.4 C
Sai Kung                     23.6 C               27.3 C
Cheung Chau                  23.0 C               29.5 C
Chek Lap Kok                 24.7 C               30.4 C
Tsing Yi                     23.7 C               29.6 C
Shek Kong                    23.5 C               31.4 C
Tsuen Wan Ho Koon            22.8 C               28.3 C
Tsuen Wan Shing Mun Valley   23.1 C               29.3 C
Hong Kong Park               24.0 C               29.0 C
Shau Kei Wan                 23.1 C               29.3 C
Kowloon City                 23.6 C               30.8 C
Happy Valley                 24.1 C               30.0 C
Wong Tai Sin                 23.6 C               29.4 C
Stanley                      23.3 C               28.1 C
Kwun Tong                    23.5 C               30.4 C
Sham Shui Po                 24.2 C               28.8 C
Kai Tak Runway Park          24.0 C               29.3 C
Yuen Long Park               23.2 C               30.8 C
Tai Mei Tuk               23.3 C               32.0 C

Duration of sunshine (King's Park):              7.1 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
Sea surface temperature (Waglan Island):        23.8 C 

Yesterday's (23 Apr 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                             0.08
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                        0.14

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 23 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <24 Apr 2018> 

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