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Bulletin updated at 14:45 HKT 23/Jun/2018

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

The southwest monsoon is bringing heavy showers and thunderstorms to the coastal areas of Guangdong. Locally, thundery showers brought about 30 millimetres of rainfall to many places around noon.

Weather forecast for this afternoon and tonight

Cloudy with showers and a few squally thunderstorms. Moderate south to southwesterly winds.

Outlook : Still a few showers tomorrow. Showers will ease off and it will become fine in the following couple of days.

(The above forecast period is valid up to 23:59 HKT today, 23/06/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Marine Forecast

Weather Forecast for Local Aviation

I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. 
     CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE SOUTHWEST MONSOON 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:  200/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  200/15-20, OCNL 25                   30-25
   B.   2000 FT:  200/20-25                            24
   C.   5000 FT:  210/20                               19
   D.  10000 FT:  210/20                               11
   E.  18000 FT:  220/15                               MS2
   F.  24000 FT:  200/10                               MS13
   G.  30000 FT:  060/10                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND SQUALLY
      THUNDERSTORMS. SHOWERS WILL BE HEAVY AT TIMES
      AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 2500 FT  BKN 10000 FT.  
      TEMPO FEW 800 FT  SCT CB 1200 FT  BKN 4000 FT.
   K. VISIBILITY    : 8 KM.  TEMPO 3000 M IN SHOWERS.  
                      TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS.  
     MAINLY CLOUDY WITH SHOWERS AND ISOLATED THUNDERSTORMS.=

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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.