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 :
     A FRESH TO STRONG EASTERLY AIRSTREAM IS
     AFFECTING THE COAST OF GUANGDONG. BESIDES, THE
     NORTHEAST MONSOON OVER INLAND GUANGDONG IS
     SPREADING SOUTHWARDS GRADUALLY AND IS EXPECTED
     TO REACH THE COASTAL AREAS OVERNIGHT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND (DIRECTION/KNOT)          TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15
                  BECMG 020/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  080/25-30
                  BECMG 020/20-25                      22-19
   B.   2000 FT:  080/15-20
                  BECMG 040/20-25                      17
   C.   5000 FT:  230/15                               18
   D.  10000 FT:  250/20                               11
   E.  18000 FT:  230/20                               MS1
   F.  24000 FT:  300/20                               MS11
   G.  30000 FT:  230/30                               MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2400-3500 FT
   I. WEATHER       : 
      CLOUDY WITH ISOLATED SHOWERS. LOCALISED MIST.
      ISOLATED THUNDERSTORMS LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 600 FT SCT 2500 FT BKN 8000 FT
      TEMPO FEW CB 500 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 8 KM, TEMPO 3000 M IN MIST/SHOWERS, TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 4.0-5.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS,
     STRONG OFFSHORE AND ON HIGH GROUNDS.
     CLOUDY WITH ISOLATED 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.