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Bulletin issued at 06:02 HKT 17/May/2018

At 6 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 83 per cent.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 26 degrees;
Tai Po 26 degrees;
Sha Tin 26 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 25 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 27 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 27 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 26 degrees.


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


Climatological Information for 17 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 05:45 HKT 17/May/2018

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

The anticyclone aloft over the northern part of the South China Sea is bringing generally fine weather to the south China coast.

Weather forecast for today

Mainly fine and hot. The maximum temperature will be around 32 degrees in the urban areas, and a couple of degrees higher in the New Territories. Moderate southerly winds.

Outlook : Mainly fine and hot in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 17/05/2018; 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 16/May/2018

N0 WARNING.

GENERAL SITUATION AT 160900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 161300 UTC:

HONG KONG= S 4. FINE. TEMP 27-32 C. =
KWANGTUNG= S 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= S TO SW 4-5. FINE. SEA UP TO 2 M. =
BASHI= S TO SE 4-5. FINE. SEA UP TO 2 M. =
PRATAS= S 4-5. FINE. SEA UP TO 2 M. =
BALINTANG= S TO SE 4-5. FINE. SEA UP TO 2 M. =
SCARBOROUGH= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. =
DANANG= S 4-5. ISOL SHOWERS. 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

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    Bulletin issued at 05:30 HKT 17/May/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 17 May 2018

    Weather Situation:
    A southerly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South force 4 to 5.
    Moderate seas.

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

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

    Waglan Island Wind south-southwest force 3
      Visibility 44 Kilometres

    Shantou Wind west-southwest force 2
      Visibility 30 Kilometres

    Dongsha Wind south force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southwest force 4

    Macau Wind south force 2
      Visibility 20 Kilometres

    Xisha Wind southeast force 2
      Visibility 30 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 17/MAY/2018
    (Next update at 9:00-9:30 HKT 17/MAY/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY 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:  160/5-10
       OFFSHORE:  160/10-15                            27-33
   B.   2000 FT:  200/10-15                            23
   C.   5000 FT:  220/15                               21
   D.  10000 FT:  220/15                               13
   E.  18000 FT:  220/15                               MS1
   F.  24000 FT:  240/20                               MS13
   G.  30000 FT:  280/15                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4000-4600 FT.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : NIL.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS. 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.

    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 08:29 HKT on 11 May 18

    VHHK SIGMET 1 VALID 110030/110430 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2042 E11330 - N2006 E11130 - N2130 E11130 - N2218 E11324 - N2042 E11330 TOP FL350 MOV NE 15KT 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 17/May/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.2 C
Minimum Air Temperature                     26.1 C
Grass Minimum Temperature                   24.5 C
Relative Humidity                        58 - 86 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           170.7 mm
Against an average of                      472.8 mm

Other Stations                Min                  Max
King's Park                  25.2 C               31.8 C
Wong Chuk Hang               24.5 C               29.9 C
Ta Kwu Ling                  23.9 C               34.0 C
Lau Fau Shan                 24.7 C               32.5 C
Tai Po                       24.7 C               32.7 C
Sha Tin                      24.2 C               32.0 C
Tuen Mun                     25.7 C               31.9 C
Tseung Kwan O                24.3 C               31.6 C
Sai Kung                     24.8 C               29.1 C
Cheung Chau                  25.3 C               32.4 C
Chek Lap Kok                 26.7 C               32.0 C
Tsing Yi                     24.9 C               31.8 C
Shek Kong                    24.1 C               33.3 C
Tsuen Wan Ho Koon            23.5 C               30.7 C
Tsuen Wan Shing Mun Valley   24.2 C               30.9 C
Hong Kong Park               25.4 C               31.0 C
Shau Kei Wan                 24.7 C               30.9 C
Kowloon City                 25.4 C               32.5 C
Happy Valley                 24.8 C               31.2 C
Stanley                      25.0 C               31.3 C
Kwun Tong                    25.5 C               32.3 C
Sham Shui Po                 25.5 C               31.3 C
Kai Tak Runway Park          25.7 C               31.7 C
Yuen Long Park               24.4 C               31.8 C
Tai Mei Tuk               25.0 C               33.1 C

Duration of sunshine (King's Park):              10.6 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 10.
Sea surface temperature (Waglan Island):        25.9 C 

Yesterday's (16 May 2018) 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                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.11
Sai Wan Ho                          0.08
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 16 May
     2003copy right image | Important notices | Privacy policy Last revision date: <17 May 2018> 

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