Whenever high clouds pass over a region, there is always a chance for sunlight moving through those clouds to create some neat optical effects. Steve Wisbey took the first picture below, with Tom Birkley passing it on to us, of such an event. The picture was taken southeast of Standiford Field in Louisville at 4:45 PM on Wednesday. It indicates a circumzenithal arc (the above part of the image) and two parahelia arcs (on either side of the sun), also known as Sun Dogs. A similar image (the second below) was taken by Mike Hall in NE Daviess County in Kentucky and submitted to us via our Facebook page.
Peter Mohlin, a meteorologist at the National Weather Service office in Charleston, SC, created a nice article on different atmospheric phenomena you might see. The article itself is linked here (to look at the full newsletter it was a part of, go here). Another good article comes from NASA, and it is linked here.