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Weather Forecast for Local Aviation

Bulletin issued at 12:30 HKT 11/DEC/2018
(Next update at 17:30 HKT 11/DEC/2018)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15, OCNL 20
       OFFSHORE:  360/15-20, OCNL 25                   19-14
   B.   2000 FT:  020/15-20, OCNL 25                   13
   C.   5000 FT:  360/10                               14
   D.  10000 FT:  250/10                               7
   E.  18000 FT:  250/40                               MS6
   F.  24000 FT:  250/50                               MS17
   G.  30000 FT:  270/60                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2900 - 3100, 4000 - 4700 FT.
   I. WEATHER       : 
      BRIGHT PERIODS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 8000 FT.
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE.  MAINLY CLOUDY.=
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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.