The National Weather Service in Sterling Virginia has expanded the * Flash Flood Watch to include portions of Maryland, Virginia, and West Virginia, including the following areas, in Maryland, Carroll, Central and Southeast Howard, Central and Southeast Montgomery, Frederick, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Southeast Harford, Southern Baltimore, and Washington. In Virginia, Clarke, Eastern Loudoun, Frederick, Warren, and Western Loudoun. In West Virginia, Berkeley, Eastern Pendleton, Jefferson, Morgan, and Western Pendleton. * From 7 AM EDT this morning through this evening * Slow moving thunderstorms capable of producing heavy rainfall may develop today. Heavy rainfall from thunderstorms may lead to flash flooding. * Potential impacts include rapid rises of water, flooded roads and flooding of structures in low lying areas near streams. Landslides and washouts are also possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that rapid rises of water and flash flooding are POSSIBLE. Flash flooding is a very dangerous situation. Those in low lying areas and near streams should monitor water levels during heavy rain and be prepared to move to high ground quickly if flooding is observed, or NWS warnings are issued. Drivers should be very cautious overnight. Low areas may become flooded, and heavy rain can cause poor drainage flooding quickly. If you encounter a flooded road, turn around, don`t drown.
By The National Weather Service, Sterling, Va.