Philadelphia weather: Showers, thunderstorms expected ahead of major cooldown

After a dry morning start with temperatures in the 40s and 50s, clouds are building across the Delaware Valley as showers and occasional thunderstorms move in around 11 a.m. Rain is already falling north and west of Philadelphia in the Lehigh Valley and Poconos before spreading into the city and South Jersey through the late morning and early afternoon. Daytime highs will reach 62 degrees with wet leaves creating slick spots on area roads ahead of a 4:47 p.m. sunset and a sharp cooldown arriving in the extended forecast.