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 COLD FRONT OVER INLAND GUANGDONG IS MOVING
     SOUTHWARDS GRADUALLY. IT IS EXPECTED TO MOVE
     ACROSS THE COASTAL AREAS AT NIGHT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  120/5-10
                  BECMG 350/15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  120/5-10
                  BECMG 350/25                         24-18
   B.   2000 FT:  170/20
                  BECMG 350/30                         18
   C.   5000 FT:  300/25                               16
   D.  10000 FT:  280/35                               11
   E.  18000 FT:  260/40                               MS7
   F.  24000 FT:  270/65                               MS15
   G.  30000 FT:  280/80                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4000-4600 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS AND
      THUNDERSTORMS. LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3500 FT 
      TEMPO FEW CB 800 FT SCT 1200 FT BKN 5000 FT
   K. VISIBILITY    : 6 KM, TEMPO 3000 M IN SHOWERS/MIST, TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 8000, 8400, 10200 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 1.0-3.0 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG NORTHERLY WINDS. FINE.=

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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.