We had the same type of weather here in Eire the other day. We had a tornado warning at 12am. The cats didn't like staying in their carriers in the basement for an hour. Fairview, where I live, was hardest hit. We found out it was a downward burst and straight line winds that caused the damage. It started over the lake and with nothing to stop it the winds topped 80 MPHs. Trees were down everywhere, but our neighborhood surpriseingly. We got hit again today. gotta love the weather.