* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of Illinois, including the following areas, Bureau, Carroll, Henry IL, Jo Daviess, Mercer, Putnam, Rock Island and Whiteside and Iowa, including the following areas, Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque, Jackson, Johnson, Jones, Linn, Muscatine and Scott. * WHEN...Through Monday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Exceptionally high amounts of moisture will combine with persistent lift from an area of low pressure aloft to bring repeated heavy rain from thunderstorms.