THIS DAY IN HISTORY

The Super Outbreak: 148 Tornadoes in 13 States (1974)

The largest tornado outbreak on record for a single 24-hour period, the Super Outbreak occurred on April 3 and 4, 1974. During that time, nearly 150 tornadoes swept across 13 central and eastern US states as well as Ontario, Canada, severely damaging approximately 900 square miles (2,330 sq km) along a total combined path length of 2,600 miles (4,180 km).