A warm and muggy day along with a cold front north of the region set the stage for numerous storms to develop Wednesday afternoon. The focus for severe activity came very quickly, with storms developing in the 2 to 3 o'clock hour. The storms caused multiple trees to come down and some structural damage. For a text listing of the damage reports that came into the weather service, click here. The image below comes from the Storm Prediction Center, and is a graphical listing of these reports.
The pictures below were from area webcams. The first is courtesy of WLKY and it shows a "rain foot" crossing downtown Louisville (the image is looking southeast from the Indiana side of the bridge). A rain foot is the slang term for a horizontal bulging near the surface in a rain shaft, forming a foot shaped prominence. It is a visual indication of strong winds near the surface.
The image below has part of the shelf cloud from the storms coming in from the west. This image is courtesy of Louisville's Trimarc system.
The image below is courtesy of WAVE3, and it shows the storms moving through Corydon.