 The National Weather Service in Norman has issued a severe thunderstorm warning for West Central Grady County in Central Oklahoma, Southeastern Caddo County in Southwestern Oklahoma, until 6 p.m. Central Daylight Time. At 5.11 p.m. Central Daylight Time, a severe thunderstorm was located 4 miles southwest of Graysmont, moving east at 20 miles an hour. Expected hazards include 60 miles an hour wind gusts and quarter-size hail.