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 :
     AT 4 P.M., TROPICAL STORM VONGFONG WAS LOCATED
     NEAR 18.7 DEGREES NORTH, 120.2 DEGREES EAST. IT
     IS FORECAST TO MOVE NORTH AT ABOUT 8 KNOTS
     TOWARDS THE LUZON STRAIT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1849 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  170/5-10
                  TEMPO VRB/15G25 IN TS                31-28
   B.   2000 FT:  160/5-10                             21
   C.   5000 FT:  180/10                               21
   D.  10000 FT:  240/15                               12
   E.  18000 FT:  250/20                               MS5
   F.  24000 FT:  250/25                               MS15
   G.  30000 FT:  260/35                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4100-5000 FT
   I. WEATHER       : 
      CLOUDY PERIODS. A FEW ISOLATED SHOWERS AND
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT TEMPO FEW CB 800 FT SCT 1200 FT BKN
      5000 FT
   K. VISIBILITY    : 10 KM, TEMPO 4000 M IN SHOWERS TEMPO 2000 M IN TS
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHERLY WINDS.  SUNNY
     PERIODS AND ISOLATED SHOWERS.=

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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.