Thanks for that great post, Venture. Something that really puts things that have happened in Joplin and Tuscaloosa in perspective for me are the 1998 tornadoes here in OKC. That was the one that messed up Lakeside Shopping Center on N. May. To me, that was pretty bad (see pic below). According to the NWS information you linked to that was an F2 tornado. Wow. Can you imagine an F5 through all that density? That shopping center would have been leveled along with a good part of Nichols Hills.