The National Weather Service has issued a Tornado Warning for Lincoln and Pottawatomie Counties until 7:30 p.m.
Nearly 6,700 OG&E customers in Central Oklahoma are without power, according to the utility's System Watch.
The Norman Forecast Office says severe thunderstorms are possible until midnight, with hail up to the size of baseballs and 70-mile-per-hour wind gusts as the main threats with some of the stronger storms.
KGOU is currently broadcasting Channel 5 KOCO-TV's First Alert Weather Coverage. Watch here.