Chris Lott
EF4
I read about the Aurora, Nebraska storm in a book I have. It stated that the tops on this particular storm reached 70,000 ft. and the 7 inch hail in the storm was referred to as "volleyball size" hail. It said it tore big chunks of ground up like it was nothing, and it also stated I believe, that this was a slow moving storm and it had quite a bit of flooding as well.