Washington, D.C. – Torrential downpours and dangerous flash flooding could grip the Mid-Atlantic through Tuesday night, with the heaviest impacts expected from Washington D.C. to Philadelphia, including Baltimore and Harrisburg.
According to the National Weather Service’s Weather Prediction Center, a Moderate Risk (Level 3 of 4) for excessive rainfall remains in effect through midnight. Widespread rainfall totals of 2 to 4 inches, with localized amounts nearing 5 inches, could trigger sudden urban and small stream flooding across densely populated corridors of Interstate 95 and U.S. Route 1.
In Maryland, drivers in Baltimore, Annapolis, and Frederick should avoid low-lying roads and underpasses. Flash flooding could also affect neighborhoods near Rock Creek Park and Anacostia River in D.C., where saturated soil increases runoff risk.
Pennsylvania residents from Philadelphia to Harrisburg may see rapid water rise in flood-prone basins, while Wilmington, Delaware, faces similar risks along the Brandywine Creek. Commuters are urged to delay travel, charge devices, and prepare for power outages as storm cells intensify this evening.
The heaviest rainfall is expected between 3 p.m. and 10 p.m., with more watches or warnings possible as storms redevelop. Flash Flood Watches remain in effect across the region.
