This video details the Super Outbreak of April 3rd & 4th, 1974.
During the outbreak, a total of 148 tornadoes caused a damage path of more than 2,500 miles leaving 330 dead and 5,484 injured. In less than 24 hours, twisters ran the gamut from 0 to 5 on the Fujita Scale with some tornadoes traveling more than 100 miles. One twister was five miles wide and at one point, 15 tornadoes were on the ground at the same time. One twister even crossed over into Canada from Michigan and back again.
In all, 13 states were struck by twisters: Alabama, Georgia, Illinois, Indiana, Kentucky, Michigan, Mississippi, North Carolina, Ohio, South Carolina, Tennessee, Virginia, and West Virginia.
To read more, you can visit the following sites:
http://www.publicaffairs.noaa.gov/storms/
http://www.crh.noaa.gov/lmk/?n=april31974
http://en.wikipedia.org/wiki/Super_Outbreak
