Sky Diary 20 May 2013 Duncan, Oklahoma tornado - 2013-05-20 at 19-03-45

Caption: There was intriguing motion in the storm, but no hail at my location. Photo by Chris Kridler, SkyDiary.com, ChrisKridler.com
Aperture: ƒ/4
Shutter Speed: 1/60
Date: 5/20/13 7:03:45 PM CDT