The most intense activity occurred on June 20, when multiple supercell thunderstorms produced numerous tornadoes across the Great Plains.
Another notable event occurred on June 22, when a series of 5 tornadoes struck the Louisville metropolitan area.
On June 19, the Storm Prediction Center issued a moderate risk of severe weather for the Central Plains.
An EF1 tornado caused severe damage south of Du Quoin, Illinois and injured 1 person.
Around 1:00 p.m. local time, storm chasers reported a large EF3 tornado on the ground north of Hill City, Kansas and again later that afternoon near Elm Creek, Nebraska.
Additionally, a major derecho event developed farther south – a PDS Severe Thunderstorm Watch was issued for parts of Oklahoma and North Texas as well.
On June 21, tornado watches were issued for several areas, including central Minnesota and Wisconsin, southern Illinois and parts of Missouri, and lower Michigan.