Wind tunnels” can create unsuspected pressure points - I had a roof shift on a very sheltered property becasue a gap in the trees was funelling wind onto one corner of quite close fitting roof. Eddies can cause VERY strong local uplifts - I have see two bricks and some elad flashing they were cemented to lifted literally 12″ into the air by what must have been a local mini-tornado. So if it could move, tie it down.
