Tornado outbreak sequence of May 5–10, 2015
The tornado outbreak sequence of May 5–10, 2015 was a six-day outbreak of tornado activity that affected the Great Plains of the United States in early May 2015. On May 6, strong tornadoes impacted the Oklahoma City area, along with rural parts of Kansas, Texas, Arkansas, South Dakota, and Nebraska.
Source: Wikipedia — Tornado outbreak sequence of May 5–10, 2015 (CC BY-SA 4.0)