 The National Weather Service in the Quad Cities has issued a flash flood warning for Southern Linn County until 12.15 a.m. Tuesday. At 6.08 p.m., DAPA radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. The expected rainfall rate is 1.5 to 2.5 inches in one hour. Flash flooding is ongoing or expected to begin shortly.