Sky Diary 26 May 2013 Nebraska supercell - 2013-05-26 at 20-27-43

Caption: The storm's structure evolved. Photo by Chris Kridler, ChrisKridler.com, SkyDiary.com
Aperture: ƒ/8
Shutter Speed: 1/200
Date: 5/26/13 8:27:43 PM CDT