WEATHER FORECAST FOR LOCAL AVIATION

Weather Forecast for Local Aviation

Bulletin issued at 01:30 HKT 21/OCT/2021
(Next update at 9:00-9:30 HKT 21/OCT/2021)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COAST OF
     SOUTHERN CHINA. MEANWHILE, THE COLD FRONT OVER
     THE NORTHERN PART OF SOUTHERN CHINA IS MOVING
     SOUTHWARDS GRADUALLY AND IS EXPECTED TO MOVE
     ACROSS THE COAST OF GUANGDUNG TODAY AFTERNOON.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND (DIRECTION/KNOT)          TEMPERATURE (DEG. C)
   A.   SURFACE:  110/5-10
                  BECMG 330/10
       OFFSHORE:  110/10-15
                  BECMG 360/10-15                      25-28
   B.   2000 FT:  130/15-20
                  BECMG 060/10                         21
   C.   5000 FT:  240/10                               17
   D.  10000 FT:  260/20                               11
   E.  18000 FT:  260/15                               MS3
   F.  24000 FT:  300/15                               MS12
   G.  30000 FT:  240/20                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, BECOMING FRESH
     NORTHERLIES.
     SUNNY INTERVALS DURING THE DAY. A FEW SHOWERS.=
===================================================================
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.


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