Philadelphia, PA- A dangerous and potentially life-threatening storm system is moving toward the Philadelphia region today, and forecasters say the worst conditions will hit during one of the most dangerous possible windows — the afternoon and evening commute.
Multiple rounds of severe thunderstorms are expected to sweep through eastern Pennsylvania, southern New Jersey and Delaware on Tuesday, bringing with them a combination of hazards that rarely occur together: damaging straight-line winds, large hail, isolated tornadoes and rapid flash flooding capable of overwhelming roads within minutes.
Active alerts for this event:
- Level 3 of 5 Enhanced Risk — Philadelphia, Reading, Allentown, central and southern NJ, most of Delaware
- Flash Flood Watch — I-95 corridor, in effect 6 a.m. Tuesday through 2 a.m. Wednesday
Forecasters say the greatest threat window runs from 2 p.m. to 8 p.m., when atmospheric conditions are expected to peak. Rainfall rates could reach 2 inches per hour in the heaviest cells — fast enough to flood streets, underpasses and low-lying neighborhoods before most people have time to react.
Communities across the Delaware Valley under elevated risk include Philadelphia, Allentown, Reading, Trenton, Wilmington, Atlantic City and Dover. Additional watches and warnings are expected to be issued as storms develop throughout the day.
Residents are urged to have multiple ways to receive emergency alerts, avoid any flooded roadway regardless of how shallow it appears, and move indoors immediately at the first sound of thunder. Officials stress that conditions can deteriorate faster than standard forecast updates — staying informed throughout the day is critical.
Monitor local emergency management and weather alerts for real-time updates as this storm system continues to develop.