Flash Flood — Frederick, Maryland

2025-05-05 · near Broad Run, Frederick, Maryland

Event narrative

St. Marks Road and Broad Run Road closed due to at least six inches of water flowing across the road.

Wider weather episode

An area of upper level low pressure brought repetitive rounds of slow moving thunderstorms to parts of central Maryland. The heaviest rain fell across Frederick County, Maryland where to two to four inches of rain were observed.

View location on OpenStreetMap → (39.3800, -77.5800)

Source: NOAA Storm Events Database, event_id 1242169. Narrative written by the NWS forecast office that issued the report.