When we build our "cabin" I want a small basement for Tornado weather. I had looked into the safe rooms but I saw what that tornado did in Jerrel. What would keep even an internal safe room from being blown off the foundation?
To have survived the Jarrell F5 tornado you flat out would have had to be underground.
People should keep in mind that the winds of even the strongest Cat 5 hurricanes are trivial compared to those of an F5 tornado.
Even in Andrew, with all of that destruction, very few people were killed. The way people get killed in large numbers in hurricanes is storm surge and inland flooding, not wind.
To simply have an entire house that would survive a Cat 3-4 (remember only three Cat 5s have hit the US in this century, they're INCREDIBLY rare) actually isn't amazingly difficult from a design or cost perspective.
And a "safe room" to survive a Cat 5 hurricane wouldn't have to be nearly as elaborate as that to survive a strong tornado.
It would have to be anchored to the ground someway.
You would have to anchor it securely to keep it in place. A basement safe room would be the best.