Source : Webster's Revised Unabridged Dictionary (1913)

Gusty \Gust"y\, a.
   Subject to, or characterized by, gusts or squalls; windy;
   stormy; tempestuous.

         Upon a raw and gusty day.                --Shak.

Source : WordNet®

gusty
     adj : blowing in loud and abrupt bursts; "blustering (or
           blusterous) winds of Patagonia"; "a cold blustery day";
           "a gusty storm with strong sudden rushes of wind" [syn:
            {blustering(a)}, {blusterous}, {blustery}]
     [also: {gustiest}, {gustier}]