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Bulletin updated at 21:45 HKT 23/Jun/2018

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

The southwest monsoon is bringing showers to the coastal areas of Guangdong.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers. Isolated thunderstorms at first. Sunny intervals tomorrow with temperatures ranging between 26 and 31 degrees. Moderate south to southwesterly winds.

Outlook : 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 tomorrow, 24/06/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

South China Coastal Waters

Weather Forecast for Local Aviation

I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE SOUTHWEST MONSOON IS BRINGING UNSETTLED
     WEATHER TO THE SOUTH CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  200/10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  200/15-20                            27-25
   B.   2000 FT:  200/15-20                            24
   C.   5000 FT:  180/15                               19
   D.  10000 FT:  190/15                               11
   E.  18000 FT:  190/15                               MS3
   F.  24000 FT:  200/10                               MS12
   G.  30000 FT:  040/10                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS. ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 2500 FT TEMPO FEW 800 FT  SCT
      CB 1200 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 3000 M IN SHOWERS.  TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS. SUNNY
     INTERVALS AND A FEW SHOWERS. ISOLATED
     THUNDERSTORMS AT FIRST.=

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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
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Aviation Weather Observation and Forecast Information for Hong Kong International Airport

To know more about clouds, please see Commonly observed clouds in Hong Kong.