 The National Weather Service in the Quad Cities has issued a severe thunderstorm warning for Southern Jackson County, Northern Cedar County, Southwestern Dubuque County, Northeastern Johnson County, Southeastern Benton County, Jones County, Southeastern Delaware County, Linn County, Western Clinton County, until 7 p.m. Storms were located along a line extending from near Langworthy to near Cedar Rapids Municipal Airport, moving east at 15 miles an hour.