What happen on April 3 1974?

Answer 1

April 3, 1974 held the majority of the Super Outbreak, which was until recently the largest single-day tornado outbreak in U.S. history. In a 15 hour period starting April 3, and continuing into early April 4 13 U.S. states and 1 Canadian province were hit by 148 tornadoes that killed over 300 people. This outbreak also holds the record for the most F5 tornadoes in a day (6), and for combined F4 and F5 tornadoes (30).

This outbreak, now ranks second for number of tornadoes in a 24-hour period, as an estimated 208 tornadoes touched down on April 27, 2011.