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 :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG.
     AT 11 PM, SEVERE TROPICAL STORM CONSON WAS
     CENTRED NEAR 15.3 DEGREES NORTH, 119.9 DEGREES
     EAST AND IS FORECAST TO MOVE NORTHWEST OR
     WEST-NORTHWEST AT ABOUT 8 KNOTS ACROSS THE
     CENTRAL PART OF THE SOUTH CHINA SEA.
     MEANWHILE, SUPER TYPHOON CHANTHU WAS CENTRED
     NEAR 15.5 DEGREES NORTH, 129.7 DEGREES EAST AND
     IS FORECAST TO MOVE WEST-NORTHWEST AT ABOUT 8
     KNOTS IN THE GENERAL DIRECTION OF TAIWAN AND
     LUZON STRAIT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND (DIRECTION/KNOT)          TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  090/10-15                            28-33
   B.   2000 FT:  090/15                               26
   C.   5000 FT:  090/15                               21
   D.  10000 FT:  090/15                               11
   E.  18000 FT:  100/20                               MS1
   F.  24000 FT:  110/20                               MS13
   G.  30000 FT:  040/20                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE WITH A FEW SHOWERS. ISOLATED
      THUNDERSTORMS OVER INLAND.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT.
      TEMPO FEW CB 1000 FT SCT 2000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE EAST TO NORTHEASTERLY WINDS.
     MAINLY FINE APART FROM 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.