Interesting article on why so many gigantic tornadoes have hit Moore, Oklahoma in the last two decades. Of course, Moore is right in Tornado Alley but that says nothing about why so many have hit that one spot and moreover, why they have all been...
tornadoes
Aftermath of the Rochester, Minnesota tornado, August 21, 1883. There's a whole page at the NOAA site of photos documenting the aftermath of this F5 tornado. Also, this series has.