Weather Forecast for Local Aviation

I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     SEV TURB AND SEV GUSTS.  GALE FORCE WINDS. ISOL
     CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS. 
     AT 5 P.M., THE TROPICAL STORM NANGKA WAS LOCATED
     AT 18.0 DEGREES NORTH, 115.6 DEGREES EAST.  IT
     IS FORECAST TO MOVE WEST OR WEST-NORTHWEST AT
     ABOUT 12 KT IN THE GENERAL DIRECTION OF THE
     VICINITY OF HAINAN ISLAND AND INTENSIFY
     GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/20-25
                  BECMG 080/30
                  TEMPO 080/25G35
       OFFSHORE:  080/25-30
                  BECMG 060/40                         30-25
   B.   2000 FT:  080/25-30
                  BECMG 070/40                         21
   C.   5000 FT:  060/30
                  BECMG 090/45                         18
   D.  10000 FT:  080/20
                  BECMG 110/35                         11
   E.  18000 FT:  130/15
                  BECMG 130/25                         MS3
   F.  24000 FT:  080/10
                  BECMG 080/20                         MS11
   G.  30000 FT:  340/10
                  BECMG 360/25                         MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3100-4300
   I. WEATHER       : 
      MAINLY FINE, BECOMING CLOUDY WITH SHOWERS AND
      SQUALLY THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3000 FT
      TEMPO FEW CB 800 FT SCT 1500 FT BKN 4000FT
   K. VISIBILITY    : 10 KM, TEMPO 4000 M IN SHOWERS, TEMPO 2500 M IN TS
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : SEV
   N. SEA STATE     : 4.0-6.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     STRONG EAST TO NORTHEASTERLY WINDS, GALE
     OFFSHORE AND ON HIGH GROUND.
     CLOULDY WITH SHOWERS AND SQUALLY THUNDERSTORMS.
     SHOWERS WILL BECOME MORE FREQUENT.=

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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.