 The National Weather Service in Norman has issued a severe thunderstorm warning for Grady County in central Oklahoma, southeastern Caddo County in southwestern Oklahoma, southwestern McLean County in central Oklahoma, until 6 p.m. Central Daylight Time. At 5.22 p.m. Central Daylight Time, severe thunderstorms were located along a line extending from near Procasa to 6 miles northeast of Burton to near Anadarko, moving southeast at 25 miles an hour.