The worst tornado outbreak of the 20th century occurred 37 years ago to-date. Dubbed the "Super Outbreak," 148 tornadoes touch downed between 1:00 PM EST April 3rd and 4th, resulting in 315+ fatalities, over 5,000 injuries and an estimated $600+ million loss (in 1974 dollars). The combined path length of all the tornadoes was approximately 2,500 miles across 13 states in the Eastern U.S., marking the longest on record for a 24-hour period.
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Online:
http://www.reliaweather.com/articles/super_outbreak_37.html
