FloodZoneMap.org

Flash Flood — Alexandria (c), VA

Jul 9, 2025

An anomalously moist airmass ahead of a frontal boundary sparked numerous showers and thunderstorms across Virginia. Instantaneous rain rates approached five to six inches an hour in the bigger storms. Storm total rainfall of one and a half to four inches resulted in flooding and flash flooding in areas throughout the evening of July 9th.

Source: NOAA National Weather Service Storm Events Database (event 1261996). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Alexandria (c), VA

This event is one of many recorded floods in Alexandria (c) County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Alexandria (c) County flood data →

More Flood Stories

Flash Flood$35K damage

Alexandria (c), VA · Jun 25, 2006

A weak cold front settled over the Mid Atlantic between June 23 and June 27. Waves of low pressure rode northeast along the front. Flow in the atmosphere was parallel to the boundary, producing several rounds of persistent showers and thunderstorms.

Read the full account →
Flash Flood$10K damage

Alexandria (c), VA · Aug 26, 1999

A line of thunderstorms moved across extreme northern Virginia from 5:00 PM to 7:00 PM EDT, producing damaging winds and very heavy rain. Winds in excess of 55 MPH blew across Loudoun County, downing trees.

Read the full account →
Flash Flood

Alexandria (c), VA · Jul 9, 2025

An anomalously moist airmass ahead of a frontal boundary sparked numerous showers and thunderstorms across Virginia. Instantaneous rain rates approached five to six inches an hour in the bigger storms.

Read the full account →
Coastal Flood

Alexandria (c), VA · Feb 17, 1998

Intensifying low pressure, containing abundant moisture from the Gulf of Mexico, moved along the Appalachian Mountains during the late morning and afternoon of the 17th.

Read the full account →