Chad Cowan (www.chasethestorms.com) took this photo of the storm that produced the record hailstones in South Dakota. The picture was taken 30-45 minutes after the largest stones fell. He graciously allowed us to post it on the blog.
Chad took the photo with a wide angle lens hanging out the car window while his girlfriend, Jenna Blum, was driving. Jenna is the author of the new book, The Stormchasers.
Patrick Marsh has a not-too-technical meteorological writeup on his blog, here.
UPDATE Saturday Morning: Photos of the "Great Hailstone Relay" drive are here.