Full Notification

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of DC, Maryland, Virginia and panhandle West Virginia, including the following areas: in DC, District of Columbia. In Maryland, Anne Arundel, Central and Southeast Howard, Central and Southeast Montgomery, Frederick MD, Northwest Howard, Northwest Montgomery, Prince Georges and Washington. In Virginia, Arlington/Falls Church/Alexandria, Clarke, Eastern Loudoun, Fairfax, Frederick VA and Western Loudoun. In panhandle West Virginia, Berkeley, Jefferson and Morgan.

* WHEN...Until 4 AM EDT Thursday.

* IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.

* ADDITIONAL DETAILS... - Numerous showers and thunderstorms with heavy rain are expected through this evening and into the overnight. Rainfall rates of 2 inches per hour are possible, leading to the potential for flash flooding especially in areas that see multiple rounds of heavy rain. - Please visit https://www.weather.gov/safety/flood for flood safety and preparedness information.

* AFFECTED AREAS: DISTRICT OF COLUMBIA ... WASHINGTON ... FREDERICK ... PRINCE GEORGES ... ANNE ARUNDEL ... NORTHWEST MONTGOMERY ... CENTRAL AND SOUTHEAST MONTGOMERY ... NORTHWEST HOWARD ... CENTRAL AND SOUTHEAST HOWARD ... FREDERICK ... CLARKE ... FAIRFAX ... ARLINGTON/FALLS CHURCH/ALEXANDRIA ... WESTERN LOUDOUN ... EASTERN LOUDOUN ... MORGAN ... BERKELEY ... JEFFERSON

Instructions:

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.