Here are some interesting pictures just emailed to us from a friend of Gary's. He took these near Kilgore, TX this afternoon. He was amazed at the completely clear circle in the cirrus clouds. The first picture was taken about 25 miles from the 'hole' in the cloud.

Here is a closer picture of the 'hole' in the sky.

This is one of those things that I can't really explain why it happened. There is an airplane contrail near the hole in the second picture.
After a quick search I found this explanation from the NWS. The airplane may have ahd something to do with this 'hole punch'.
http://www.srh.noaa.gov/mob/121103hole_punch/holepunch-main.html
Jeremy