May 15, 2018
A cold front slowly sagged southward through Maryland during the evening hours of May 15th. A line of storms spread ahead of this front, producing 1-2 inches of rain in parts of Loudoun, Fairfax, and Arlington Counties, and the City of Alexandria. This was enough to cause some flooding. Stream flooding continued into the early morning hours of the 16th.
Source: NOAA National Weather Service Storm Events Database (event 758039). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Fairfax County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.