70 isn't bad, but I was in a microbust that was clocked at 106. Sounded just like a freight train. I thought we were going to die from a Tornado. Just that quickly it was gone.
Several years ago there was a nasty storm that went north of me. They had trees that were totally stripped and bill board signs that were tipped over. We didn't have that kind of damage from the little microbust I was in.