Imagine how terrible it must have been back then without any advance warning systems.
Add this to the list:
http://ww2.ohiohistory.org/etcetera/exhibits/swio/pages/content/1974_tornado.htm
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The tornado superoutbreak of April 3-4, 1974 resulted in 148 tornadoes in 13 states. Across the United States, 315 people were killed, more than 6,000 injured, and 27,000 families suffered property losses. The Xenia Tornado caused the most deaths of any tornado in the outbreak. In Ohio, 12 tornadoes touched down, killing 36 people.