effect until 800 am cst for marshall...norther n tama...grundy and black hawk counties... at 358 am cst...doppler radar indicated isolated thunderstorms embedded in areas of heavy rain across the warned area. between two and three inches of rain has already occurred with up to another inch of rainfall expected. the most like areas to see flash flooding will be along a line to clemons. this corridor is where the heaviest rainfall has occurred. an additional 1-2+" is possible in this area today. stay on alert for rising rivers, streams and flooded roadways. some locations that will experience flooding include... waterloo...cedar falls...marshalltow n...grundy center...evansdale... jesup...la porte city...hudson...traer ...reinbeck...state center... dysart...dike...elk run heights...conrad...cr ossroads mall...uni-dome and mcleod center...waterloo municipal airport...gladbrook and le grand. precautionary/prep aredness actions... be especially cautious at night when it is harder to recognize the dangers of flooding. turn around...dont drown when encountering flooded roads. mos