Counties: CRAWFORD-CARROLL-AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR-MADISON

551 AM CDT TUE SEP 4 2012 National Weather Service/DesMoines

TODAY AND TONIGHT: THUNDERSTORMS ARE EXPECTED TO DEVELOP BY LATE AFTERNOON INTO EARLY EVENING ACROSS WESTERN IOWA. THESE STORMS WILL SPREAD EAST OVERNIGHT WITH A SLIGHT RISK OF SEVERE AS THEY PASS THROUGH IOWA. THE MAIN THREAT AT THIS TIME WILL BE DAMAGING WINDS WITH THE POSSIBILITY OF LARGE HAIL AS WELL.