Tornado Tamer: A Tornado-Resistant Door The Tornado Tamer – It’s been tested by Texas Tech Wind Science University, and it meets FEMA 320 Guidelines for a unit that can resist a wind force of up to 250 mph. (Steel Storm Shelters, LLC) Two Important Advantages – The Tornado Tamer door has tornado-resistant strength that matches the strength of a Monolithic Dome and is affordable. (Steel Storm Shelters, LLC)