Flash Flood — Fairfax, Virginia

2025-07-19 · near Reston, Fairfax, Virginia

Event narrative

Walker Road closed between Parker Royal Drive and Walker Mill Road. At least 6 inches of flowing water over the road where it crosses Piney Run.

Wider weather episode

An unstable atmosphere along with plenty of moisture led to the development of showers and thunderstorms. The thunderstorms were slow moving, and trained over the same areas in spots resulting in flash flooding. Localized rainfall totals of 2 to 4 inches were observed, with upwards of 5 inches in the most persistent thunderstorms.

View location on OpenStreetMap → (38.9800, -77.3000)

Source: NOAA Storm Events Database, event_id 1264783. Narrative written by the NWS forecast office that issued the report.