A tornado touched down at about 2:53 p.m. CDT Monday in Moore, between Norman and Oklahoma City.
Several tornadoes touched down from Oklahoma to Iowa, including near Wichita, Kan., and Oklahoma City, on Sunday.
Slow-moving showers and storms will bring heavy rain and flooding potential.
Reports from Monday's severe weather.
Rising temperatures and humidity across the mid-Atlantic will have it feeling like the end of June.
Heavy rain returning to the northern Plains will generate a renewed flood threat for the Red River.
Orlando, Fl (2005)
High temperature finally reached 90 degrees. This gets a record for the latest occurrence of the first degrees day of the year.
Ohio Valley (1860)
Tornado swarm in Ohio Valley hit Louisville, KY, Cincinnati, OH, Chilicothe, OH, and Marietta, OH. Damage totalled $1 million; 4 people killed in Cincinnati.
Texas County, OK (1937)
Severe dust storm called "Black Blizzard" visibility near zero for 10 minutes.