Philadelphia, PA – Residents across Pennsylvania, New Jersey, Delaware, and Maryland should prepare for widespread thunderstorms Thursday afternoon into the overnight hours, with a growing risk of flash flooding—especially in urban and low-lying areas.
According to the National Weather Service in Mount Holly, storms are expected to bring rainfall rates of more than 2 inches per hour, with 2–4 inches of rain likely and localized totals potentially exceeding 6 inches. The highest threat is centered in the Moderate Risk (Level 3 of 4) area, which includes Philadelphia, Wilmington, Trenton, Baltimore, and surrounding counties.
Drivers should avoid flood-prone roadways like I-95, Route 1, and smaller urban streets during heavy downpours. Flash flooding is likely in creeks, streams, and poor drainage zones, especially near metro areas. Emergency managers urge residents to secure belongings, monitor alerts, and avoid travel during peak storm hours.
Localized wind damage is also possible in the afternoon and early evening, but flooding remains the primary concern. This marks one of the most widespread flood risks of the summer for the Mid-Atlantic region.
More warnings and advisories could be issued as conditions evolve. Stay alert for updates throughout the day Thursday.
