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 2018
The Storm Prediction Center issued an enhanced risk of severe weather for portions of the Great Lakes region of the United States on September 20. This outlook included a 10% hatched risk area for tornadoes. A line of severe thunderstorms with numerous embedded tornadoes impacted the region that evening. Twenty-five tornadoes touched down in Minnesota alone, making September 20, 2018 the third-most prolific tornado day in state history.