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 8 A.M., SEVERE TYPHOON CHANTHU WAS LOCATED AT
     29.1 DEGREES NORTH, 123.4 DEGREES EAST AND IS
     FORECAST TO MOVE NORTH AT ABOUT 10 KNOTS ACROSS
     THE EAST CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND (DIRECTION/KNOT)          TEMPERATURE (DEG. C)
   A.   SURFACE:  210/5-10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  210/10-15                            31-36
   B.   2000 FT:  210/10                               26
   C.   5000 FT:  050/5
                  120/5 LATER                          20
   D.  10000 FT:  200/5                                12
   E.  18000 FT:  310/5                                1
   F.  24000 FT:  340/5                                MS12
   G.  30000 FT:  060/10                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      SUNNY PERIODS WITH A FEW SHOWERS. ISOLATED
      THUNDERSTORMS.
   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: 18500 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTH TO SOUTHWESTERLY WINDS. 
     MAINLY CLOUDY WITH A FEW SHOWERS AND ISOLATED
     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.