* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of east central Ohio, including the following areas, Carroll, Columbiana and Jefferson OH, Pennsylvania, including the following areas, Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette, Forest, Greene, Higher Elevations of Fayette, Higher Elevations of Indiana, Higher Elevations of Westmoreland, Indiana, Jefferson PA, Lawrence, Mercer, Venango, Washington and Westmoreland, and West Virginia, including the following areas, Brooke, Eastern Preston, Eastern Tucker, Hancock, Marion, Marshall, Monongalia, Ohio, Preston, Ridges of Eastern Monongalia and Northwestern Preston, Western Tucker and Wetzel. * WHEN...Until midnight EDT tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Showers and thunderstorms are expected at times through the day, producing heavy rainfall. This could result in flash flooding, especially in areas that see repeated heavy thunderstorms. - http://www.weather.gov/safety/flood