I see all the videos on tornado shelters going through the impact tests, but what about your storm shelter actually going through 250+ simulated winds?
Impacts are the greatest threat to your survival...small, javelin-like objects travelling at high velocity, not wind. That's why they physically check that at Texas Tech University during impact testing and not put them in a wind tunnel or drop heavy objects on them. The energy found in small missile debris is much more critical than larger, slower moving objects with much greater surface area, and certainly much more than just wind. In reality, the Tornado Alley Armor Safe Room anchor system is engineered with a safety factor of 10x the maximum wind force you'd experience in an EF5 tornado.
Follow this link for more information and to see the actual debris impact test: