Weather Forecast for Local Aviation

I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE BAND OF THUNDERY SHOWERS AFFECTING GUANGDONG
     AREAS IS EDGING SOUTHWARDS TOWARDS THE COASTAL
     AREAS. THE EASTERLY AIRSTREAM AFFECTING THE
     COASTAL AREAS IS STRENGTHENING GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/5-10
                  BECMG 080/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  110/10-15
                  BECMG 090/20-25                      29-26
   B.   2000 FT:  110/10
                  BECMG 090/20-25                      22
   C.   5000 FT:  100/10                               18
   D.  10000 FT:  350/10
                  BECMG 130/5-10                       12
   E.  18000 FT:  350/10                               MS2
   F.  24000 FT:  350/10                               MS11
   G.  30000 FT:  010/10                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY, OCCASIONAL SHOWERS AND SQUALLY
      THUNDERSTORMS, SHOWERS WILL BE HEAVY AT TIMES
      AT FIRST
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 2500 FT 
      TEMPO FEW CB 1000 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 10 KM, TEMPO 3000 M IN SHOWERS, 
                      TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.0-3.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS, STRONG
     OFFSHORE.
     MAINLY CLOUDY WITH OCCASIONAL SHOWERS. SHOWERS
     WILL BE HEAVY IN SOME AREAS WITH 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.