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Bulletin updated at 02:45 HKT 20/Jun/2018

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

The southwest monsoon is affecting the coast of Guangdong.

Weather forecast for today

Mainly cloudy. One or two showers in the morning. Sunny periods during the day. It will be hot. Temperatures will range between 28 and 32 degrees. Moderate southwesterly winds, occasionally fresh offshore.

Outlook : Hot with sunny periods and a few showers in the following few days.


(The above forecast period is valid up to 23:59 HKT today, 20/06/2018; 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 01:30 HKT 20/JUN/2018
(Next update at 9:00-9:30 HKT 20/JUN/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 WATERS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  220/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  220/15-20                            28-33
   B.   2000 FT:  230/20-25                            23
   C.   5000 FT:  230/20                               20
   D.  10000 FT:  240/15                               12
   E.  18000 FT:  330/5-10                             MS2
   F.  24000 FT:  020/10                               MS14
   G.  30000 FT:  080/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ONE OR TWO SHOWERS IN THE
      MORNING. A CHANCE OF ISOLATED THUNDERSTORMS.
      SUNNY PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND HILLS. MOD OFFSHORE
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS, FRESH OFFSHORE.
     SUNNY PERIODS. ISOLATED SHOWERS AND
     THUNDERSTORMS.=

===================================================================
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 16:25 HKT on 19 Jun 18

VHHK SIGMET 1 VALID 190430/190830 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N2100 E11730 - N2042 E11536 - N2300 E11518 - N2342 E11730 - N2100 E11730 TOP FL420 MOV E 10KT WKN= VHHK SIGMET 2 VALID 190830/191130 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2254 E11454 - N2342 E11730 - N2130 E11730 - N2124 E11454 - N2254 E11454 TOP FL400 MOV E 10KT WKN=

Please click here for more about the SIGMET

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 20/Jun/2018 
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.5 C
Minimum Air Temperature                     28.6 C
Grass Minimum Temperature                   26.8 C
Relative Humidity                        71 - 84 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           546.7 mm
Against an average of                      936.0 mm

Other Stations                Min                  Max
King's Park                  28.0 C               31.3 C
Wong Chuk Hang               27.9 C               30.6 C
Ta Kwu Ling                  26.0 C               33.1 C
Lau Fau Shan                 26.0 C               33.0 C
Tai Po                       27.1 C               31.9 C
Sha Tin                      28.0 C               31.6 C
Tuen Mun                     27.8 C               32.0 C
Tseung Kwan O                27.1 C               32.2 C
Sai Kung                     28.5 C               33.0 C
Cheung Chau                  27.1 C               31.5 C
Chek Lap Kok                 28.1 C               33.8 C
Tsing Yi                     28.0 C               31.4 C
Shek Kong                    27.5 C               33.3 C
Tsuen Wan Ho Koon            26.9 C               28.9 C
Tsuen Wan Shing Mun Valley   28.1 C               30.2 C
Hong Kong Park               28.3 C               30.9 C
Shau Kei Wan                 27.1 C               31.0 C
Kowloon City                 27.6 C               31.5 C
Happy Valley                 28.0 C               31.0 C
Wong Tai Sin                 28.2 C               31.9 C
Stanley                      27.6 C               29.8 C
Kwun Tong                    27.7 C               31.4 C
Sham Shui Po                 27.8 C               31.0 C
Kai Tak Runway Park          27.8 C               31.3 C
Yuen Long Park               27.4 C               33.3 C
Tai Mei Tuk               26.9 C               32.4 C

Duration of sunshine (King's Park):              2.5 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 10.
 

Yesterday's (19 Jun 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                           0.09
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                         0.14
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 19 Jun
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