I've been looking over past history books, pictures, videos, etc of April 3, 1974 tornado outbreak, and it makes me wonder when will this happen again. (Please bare with me, considering I am writing this 2:30 am, I may not make sense at certain portions.) But with 148 tornadoes within a 24-48 hour period touching down in 11 states, its amazing the amount of damage that occured. Even to this day, you can still see damage in Borden, Indiana caused by the massive F5 tornado that hit the area.
Eh I'll continue this when I am more awake. :)