* WHAT. Flash flooding caused by excessive rainfall is possible. * WHERE. Portions of Virginia, including the following areas, Albemarle, Augusta, Central Virginia Blue Ridge, Culpeper, Eastern Highland, Greene, Madison, Nelson, Northern Virginia Blue Ridge, Orange, Page, Rappahannock, Rockingham, Shenandoah, Warren and Western Highland and eastern West Virginia, including the following areas, Eastern Grant, Eastern Pendleton, Hardy, Western Grant and Western Pendleton. * WHEN. From 4 PM EDT this afternoon through Monday morning. * IMPACTS. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS. - Slow moving showers and possible thunderstorms are expected late today into this evening. One to three inches of rain are likely. Given saturated soils and swollen streams and rivers, flooding is possible. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information