What’s the difference between a Flash Flood Watch and a Flash Flood Warning? Click this link.
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Watch for portions of Maryland, The District of Columbia, and Virginia, including the following areas, in Maryland, Anne Arundel, Calvert, Carroll, 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. The District of Columbia. In Virginia, Arlington/Falls Church/Alexandria, Culpeper, Eastern Loudoun, Fairfax, King George, Madison, Northern Fauquier, Orange, Prince William/Manassas/Manassas Park, Rappahannock, Southern Fauquier, Spotsylvania, Stafford, and Western Loudoun.
* Through late tonight
* Thunderstorms with heavy rainfall are expected across the region this afternoon and evening. The potential for training thunderstorms exists, which could result in several inches of rain in one to two hours. Soils are already very moist, meaning most of this rain would rapidly run off.
* Runoff from excessive rainfall may cause rapid rises of water in low-lying and poor drainage areas as well as streams and creeks, resulting in flash flooding. Urban areas will be most susceptible.
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.