* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of western New York, including the following counties, Allegany, Cattaraugus, Chautauqua, Livingston, Ontario, Southern Erie and Wyoming. * WHEN...Through Thursday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Area creeks and streams are running high and could flood with more rain. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood