When we built the new house for my folks , it was middle of August when we finally got the walls up and the roof perlins and everything tied together.
Storm clouds popped up to the south just after we got the roof covered, and looky looky straight south of us came two twisters on the ground, one lined up with the living room window and one perfectly squared in the kitchen window...

Fortunately they got to the big draw about 3/4 mile to the south and picked up.