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 :
     A SOUTHERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS. BESIDES, A TROUGH OF LOW
     PRESSURE IS BRINGING SHOWERS AND THUNDERSTORMS
     TO INLAND GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND (DIRECTION/KNOT)          TEMPERATURE (DEG. C)
   A.   SURFACE:  200/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  200/10-15                            32-30
   B.   2000 FT:  210/15, OCNL 20                      24
   C.   5000 FT:  220/15                               18
   D.  10000 FT:  240/20                               12
   E.  18000 FT:  260/20                               MS3
   F.  24000 FT:  280/25                               MS12
   G.  30000 FT:  300/25                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY. A FEW SHOWERS AND ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 2500 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) : 10800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, MOD NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS. 
     MAINLY FINE. A FEW SHOWERS AND ISOLATED
     THUNDERSTORMS.=

===================================================================
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
===================================================================

Aviation Weather Observation and Forecast Information for Hong Kong International Airport

To know more about clouds, please see Commonly observed clouds in Hong Kong.