...FLOOD WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of DC, including the following , District of Columbia, Maryland, including the following areas, Anne Arundel, Calvert, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Charles, Frederick MD, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford, Southern Baltimore and St. Marys, and Virginia, including the following areas, Albemarle, Arlington/Falls Church/Alexandria, Central and Southeast Prince William/Manassas/Manassas Park, Culpeper, Eastern Loudoun, Fairfax, Greene, King George, Madison, Nelson, Northern Fauquier, Northwest Prince William, Orange, Rappahannock, Southern Fauquier, Spotsylvania, Stafford and Western Loudoun. * WHEN...From Wednesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Numerous showers and thunderstorms will move across the area Wednesday afternoon and evening. Rainfall rates of up to 2 inches per hour are possible, which may lead to scattered instances of flash flooding where the heavy rain persists the longest. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&