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 :
     SEVERE TROPICAL STORM CEMPAKA HAS WEAKENED INTO
     A TROPICAL STORM.
     AT 8 A.M., CEMPAKA WAS CENTRED NEAR 21.9 DEGREES
     NORTH 111.3 DEGREES EAST AND IS FORECAST TO MOVE
     WEST AT ABOUT 5 KNOTS MOVING ACROSS THE COASTAL
     AREAS OF WESTERN GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND (DIRECTION/KNOT)          TEMPERATURE (DEG. C)
   A.   SURFACE:  120/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  120/15-20, OCNL 25                   27-30
   B.   2000 FT:  120/15-20, OCNL 25                   24
   C.   5000 FT:  170/15                               19
   D.  10000 FT:  190/15                               12
   E.  18000 FT:  200/10                               MS1
   F.  24000 FT:  090/15                               MS10
   G.  30000 FT:  090/15                               MS21
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH OCCASIONAL HEAVY SQUALLY SHOWERS
      AND THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2000 FT. 
      TEMPO FEW CB 800 FT SCT 1500 FT BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 2500 M IN SHOWERS. TEMPO 1000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHEASTERLY WINDS.
     MAINLY CLOUDY WITH SHOWERS AND 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
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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.