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Philly Braces for Storms: Flash Floods, Lightning Alert!
20 Aug
Summary
- A NEXT Weather Alert is in effect for the Philadelphia region.
- Heavy rain, flash flooding, lightning, and damaging winds are expected.
- The main storm window is Thursday afternoon into the evening.

The Philadelphia area is preparing for a NEXT Weather Alert on Thursday, with a strong cold front expected to bring substantial showers and thunderstorms. The main impact window for heavier rain and storms is anticipated from Thursday afternoon through the evening. There is a slight risk of excessive rainfall and localized flash flooding, especially along and east of I-95, with the potential for torrential downpours. Additionally, a slight risk of severe storms exists from I-78 southward, which could bring damaging wind gusts. Residents are advised to have umbrellas ready and allow extra travel time, particularly during the evening commute, which may be slowed by heavy rain. Humidity is expected to rise with the approaching storms. Friday is predicted to be significantly quieter, featuring sunshine and highs in the mid-80s. However, the cold front may stall, keeping the pattern unsettled into the weekend, with a chance of showers returning Friday night and into Saturday and Sunday.