This radar image shows the storm's location relative to the photographer (in northwest Miami County).  The arc of weak reflectivity surrounding the storm is the storm's outflow boundary, marking the leading edge of rain-cooled air and gusty winds.  The outflow boundary originated when the storm dropped a downburst over Enon, downing several trees and power lines (marked by the white arrow).  These strong winds fanned out from the storm, creating the circular outflow boundary seen here.  A loop of this radar image would show the outflow boundary spreading out in all directions from the storm.