With nearly 1700 tornadoes confirmed, 2011 was one of the most prolific years for tornadoes in the United States. This ranked the second highest annual total since 1950. Also, with 553 casualties, it was the deadliest tornado year since 1936. The majority of these fatalities occurred during outbreaks, a group of tornadoes associated with a single synoptic-scale weather system. Outbreaks… Read more →