* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of southeast Michigan, including the following areas, Bay, Genesee, Huron, Lapeer, Lenawee, Livingston, Macomb, Midland, Monroe, Oakland, Saginaw, Sanilac, Shiawassee, St. Clair, Tuscola, Washtenaw and Wayne. * WHEN...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 ou