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Bulletin updated at 14:45 HKT 26/May/2018

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

An anticyclone aloft continues to bring mainly fine weather to the coast of southeastern China. Locally, temperatures over many places rose to about 33 degrees around noon.

Weather forecast for this afternoon and tonight

Mainly fine and very hot. Moderate southwesterly winds.

Outlook : Very hot weather will persist and there will be isolated showers in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 26/05/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 12:30 HKT 26/MAY/2018
(Next update at 17:30 HKT 26/MAY/2018)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  220/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  220/15-20                            35-29
   B.   2000 FT:  230/15                               24
   C.   5000 FT:  240/15                               20
   D.  10000 FT:  260/15                               11
   E.  18000 FT:  180/10                               MS2
   F.  24000 FT:  160/10                               MS13
   G.  30000 FT:  140/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE APART FROM A FEW SHOWERS AND
      ISOLATED THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 4000 FT. 
      TEMPO FEW CB 800 FT  SCT 1500 FT BKN 4000 FT
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. 
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS. 
     CLOUDY PERIODS WITH ISOLATED SHOWERS.=

===================================================================
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 12:22 HKT on 25 May 18

VHHK SIGMET 1 VALID 250025/250425 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2006 E11224 - N1742 E11412 - N1706 E11336 - N1930 E11130 - N2006 E11130 - N2006 E11224 TOP FL300 STNR NC= VHHK SIGMET 2 VALID 250425/250825 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1806 E11506 - N1648 E11400 - N1930 E11142 - N1930 E11342 - N1806 E11506 TOP FL300 STNR 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 26/May/2018 
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.1 C
Minimum Air Temperature                     27.6 C
Grass Minimum Temperature                   25.4 C
Relative Humidity                        57 - 79 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           170.7 mm
Against an average of                      563.8 mm

Other Stations                Min                  Max
King's Park                  26.6 C               32.7 C
Wong Chuk Hang               25.9 C               31.4 C
Ta Kwu Ling                  23.6 C               34.3 C
Lau Fau Shan                 25.9 C               34.5 C
Tai Po                       25.7 C               33.7 C
Sha Tin                      25.8 C               33.2 C
Tuen Mun                     26.1 C               33.9 C
Tseung Kwan O                24.5 C               33.1 C
Sai Kung                     26.1 C               32.3 C
Cheung Chau                  26.3 C               34.9 C
Chek Lap Kok                 28.0 C               35.2 C
Tsing Yi                     26.7 C               33.2 C
Shek Kong                    25.3 C               34.4 C
Tsuen Wan Ho Koon            25.0 C               32.0 C
Tsuen Wan Shing Mun Valley   25.4 C               32.2 C
Hong Kong Park               26.6 C               31.6 C
Shau Kei Wan                 26.1 C               32.5 C
Kowloon City                 26.7 C               34.0 C
Happy Valley                 26.0 C               33.1 C
Wong Tai Sin                 26.8 C               33.1 C
Stanley                      26.3 C               32.0 C
Kwun Tong                    27.0 C               33.1 C
Sham Shui Po                 27.0 C               31.7 C
Kai Tak Runway Park          26.5 C               32.7 C
Yuen Long Park               25.5 C               34.2 C
Tai Mei Tuk               25.9 C               34.9 C

Duration of sunshine (King's Park):              8.4 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 9.
Sea surface temperature (Waglan Island):        26.2 C 

Yesterday's (25 May 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                           0.09
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                           0.12
Sai Wan Ho                          0.08
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 25 May
 2003copy right image | Important notices | Privacy policy Last revision date: <26 May 2018> 

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