Back in 2012 a member of the forums, PerryG114 had a tornado hit his property in Alabama. There was a lot of damage to his property and the local area. His 31" '81 Excella made it out mostly unscathed. The most amazing bit is his driveway security cam which showed the passing of the tornado and the zipdee awning being ripped from the trailer but the trailer only moved a foot or so. Check out the driveway video in the link on the post.
https://www.airforums.com/forums/f16...ml#post1114511. I'd say unless you are hot by a tree or other flying projectile, you're pretty safe in an Airstream during a storm.