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 :
     SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A
     TROUGH OF LOW PRESSURE ARE AFFECTING GUANGDONG.
     MEANWHILE, A SOUTHWESTERLY AIRSTREAM IS
     AFFECTING THE SOUTH CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND (DIRECTION/KNOT)          TEMPERATURE (DEG. C)
   A.   SURFACE:  220/10, OCNL 15
                  TEMPO VRB/20G35 IN TS
       OFFSHORE:  220/10-15, OCNL 20                   31-28
   B.   2000 FT:  240/15-20                            24
   C.   5000 FT:  240/25                               19
   D.  10000 FT:  250/25                               12
   E.  18000 FT:  270/20                               MS1
   F.  24000 FT:  280/15                               MS12
   G.  30000 FT:  280/15                               MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY WITH OCCASIONAL SHOWERS AND SQUALLY
      THUNDERSTORMS. SHOWERS WILL BE HEAVIER AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2500 FT
      TEMPO FEW CB 800 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 10 KM. TEMPO 3000 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 12200 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. 
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-2.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE. 
     CLOUDY WITH OCCASIONAL SHOWERS AND SQUALLY
     THUNDERSTORMS. SHOWERS WILL BE HEAVIER AT TIMES.=

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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.