David Imy, who retired from the National Weather Service after 30 years, guided Sooner Rotarians through a study of determining the storm level in accordance with the Enhanced Fujita scale.  Showing slides of storm damage, he pointed out the various aspects of the damage used to rate the storm.  Then the group viewed other slides and attempted to establish the rating.  Imy, a Sooner Rotarian, held the interest of the group with his data and information, including guidance on how to survive a tornado.  He advised to seek protection in the center of your house if you don't have a storm shelter and do not get in your car. If you are in your car, do not park or seek shelter under an overpass.