Tornado Alley
States such as Missouri, Iowa, Minnesota, Wisconsin, Illinois, Indiana, and western Ohio are sometimes included in Tornado Alley. Research suggests that tornadoes are becoming more frequent in the northern parts of Tornado Alley where it reaches the Canadian prairies.
Tornadoes of 2014
A moderate outbreak of 44 tornadoes impacted the central United States in early May 2014. On May 10, numerous supercell thunderstorms developed across Missouri in advance of an intensifying upper-level low over the Great Basin. One supercell spawned a damaging EF2 tornado that moved through downtown Orrick, Missouri, causing significant damage but no fatalities. 80% of the structures in Orrick were damaged, and the school sustained major damage and lost much of its roof. On May 11, the upper-level low continued eastward into the Plains, providing ample wind shear for tornadoes; in preparation for the event, the Storm Prediction Center issued a Moderate risk for severe weather. Numerous thunderstorms developed across the Midwest – particularly Kansas, Nebraska, and Iowa – spawning many tornadoes. A large multiple-vortex EF3 tornado passed near the town of Sutton, Nebraska, causing considerable damage to farm properties and flattening an unanchored farmhouse. Powerful rear flank downdraft winds spawned by the parent supercell severely damaged downtown Sutton. Another very large rain-wrapped EF3 wedge tornado passed near the town of Cordova, Nebraska, destroying multiple homes nearby, spawning multiple satellite tornadoes, and growing to well over a mile wide at times. The Cordova tornado eventually struck the town of Beaver Crossing before dissipating, damaging virtually every structure in town, with a few destroyed. Two separate tornadoes (rated EF2 and EF1) also caused severe damage near the town of Raymond. Numerous other less significant tornadoes touched down in Nebraska and other states that evening as well. Later that night, an EF2 tornado largely destroyed a lakeside condominium building near Yale, Iowa. Two weak EF0 tornadoes touched down in northern Ohio on May 12 before the outbreak came to an end.