* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of central, north central, northeast, northwest, and west central Georgia, including the following areas, in central Georgia, Butts, Jasper and Monroe. In north central Georgia, Barrow, Cherokee, Clayton, Cobb, Dawson, DeKalb, Douglas, Fannin, Fayette, Forsyth, Gilmer, Gwinnett, Hall, Henry, Lumpkin, Newton, North Fulton, Pickens, Rockdale, South Fulton, Union and Walton. In northeast Georgia, Banks, Jackson, Towns a