April 25 to 28, 2011 will live in the memories of many residents of the Southern, Midwestern, and Northeastern United States.
For a span of 3 days, 7 hours, and 18 minutes there were 360 confirmed tornadoes across the region.
The outbreak was the largest, costliest, and one of the deadliest tornado outbreaks ever recorded.
There were 324 casualties plus 24 non-tornadic fatalities and over 3,100 people were injured. Damage was at $10.2 billion (2011 USD).
The Storm Prediction Center said on Wednesday, April 27th at 11:29 AM that a "major tornado outbreak expected this afternoon and evening across the Tennessee Valley and the southern Appalachian Mountains extending northward into the southern Ohio Valley."