Well Terri, the Snowy owl is back and so are the Audubon people. You are right, it is extremely rare to see one this far South, if ever. The last few nights he has been on house roofs a street over from me. There is a constant flow of bird watchers with their cameras. In fact he/she made the local newspaper. According to these people the last sighting of one was over a 100 years ago in Central Park, NY as the Southern most point.
Edit: He may have never went away except to eat, as he/she has been spotted in the neighborhood from time to time by other neighbors.