* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...All of southeast Michigan. * WHEN...From 8 PM EDT this evening through late Thursday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - In the last 10 days, most of southeastern Mi