Tornado outbreak of April 10–11, 2001
The tornado outbreak of April 10–11, 2001, was a large tornado outbreak which affected the central Great Plains on April 10–11, 2001. During the two-day outbreak, it produced a total of 79 tornadoes across eight states including Kansas, Missouri, Oklahoma, Texas, Nebraska, Iowa, Illinois and Michigan.
Source: Wikipedia — Tornado outbreak of April 10–11, 2001 (CC BY-SA 4.0)