...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... The Flash Flood Watch continues for * Portions of DC...Maryland...Virginia and West Virginia, including the following areas: in DC, District of Columbia. In Maryland, Anne Arundel, Calvert, Carroll, Central and Eastern Allegany, Central and Southeast Howard, Central and Southeast Montgomery, Charles, Extreme Western Allegany, Frederick MD, Garrett, Northern Baltimore, Northwest Howard, Northwest Montgomery, Prince Georges, Southern Baltimore, St. Marys and Washington. In Virginia, Arlington/Falls Church/Alexandria, Clarke, Eastern Loudoun, Fairfax, Frederick VA, Northern Fauquier, Prince William/Manassas/Manassas Park, Shenandoah, Warren and Western Loudoun. In West Virginia, Berkeley, Eastern Grant, Eastern Mineral, Hampshire, Hardy, Jefferson, Morgan, Western Grant and Western Mineral. * Until Midnight EDT tonight * A cold front will drop southward into the area today. This front will become the focus for slow moving thunderstorms this afternoon and evening. Because of the slow motion and ample moisture in the atmosphere, storms may drop 2 to 4 inches of rain in a short period of time, resulting in flash flooding. * Heavy rainfall in a short amount of time can result in rapid rises of water in streams, creeks, and urban areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.