 The National Weather Service in Norman has issued a severe thunderstorm warning for northwestern Kingfisher County in central Oklahoma, northeastern Blaine County in northwestern Oklahoma, southwestern Garfield County in northern Oklahoma, southeastern Madrid County in northwestern Oklahoma, until 7.45 p.m. Central Daylight Time. At 7.01 p.m. Central Daylight Time, a severe thunderstorm was located near Ames and is nearly stationary.