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10 terrifying twisters

By: Laura Moss on July 30, 2010, 12:05 p.m.
Super Outbreak tornado hits Cincinnati in 1974

Photo: ZUMA Press

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Cincinnati, Ohio

This tornado was one of 148 tornados to strike in 13 central U.S. states in an 18-hour period on April 3, 1974. The “Super Outbreak” is the most extensive tornado outbreak on record, damaging 900 square miles and killing more than 300 people.