51 Aprils Ago, History’s Worst Tornado Outbreak Began in Illinois51 Aprils Ago, History’s Worst Tornado Outbreak Began in IllinoisIt was 51 Aprils ago when the worst tornado outbreak in United States history began when storms began to impact Illinois. 30 EF-4 and EF-5 twisters would eventually kill 335. Doc HollidayDoc Holliday
