Tornadoes in the United States
The Midwestern states are very prone to tornado activity, as they are part of "Tornado Alley." States included in the area that are hit by tornadoes the most are Oklahoma, Kansas, Missouri, Nebraska, Iowa, and South Dakota. The Midwestern States are often hit by tornadoes during the late spring and early summer months, especially the months of May and June. This is due to the aforementioned air mass moving northward into the Midwest and combining with another air mass that move southward from Canada. This creates unstable air, creating the potential for storms to strike the most during these months. The frequency begins to decrease in the middle of the summer, as the air mass moves northward into the Great Lakes states.
Tornado outbreak of mid-November 2005
The tornado outbreak of mid-November 2005 was a tornado outbreak on November 15, 2005, in the Midwestern United States. It occurred along a cold front separating warm, humid air from the southeast from cold Arctic air to the north and northwest. At least 50 confirmed tornadoes have been reported in the central United States in the states of Alabama, Arkansas, Illinois, Indiana, Kentucky, Missouri and Tennessee over that afternoon and evening. Strong winds and large hail caused additional damage throughout the region. The National Weather Service confirmed 49 tornado touchdowns during the outbreak.