Overnight and morning thunderstorms on Sunday pounded the Mid Atlantic withflooding downpours, high winds and even hail.The most far-reaching impact was that of urban and flash flooding triggeredby rainfall of 1-2 inches within only an hour. Indeed, it was rain this heavythat washed the hills of greater Philadelphia late in the morning. Waterpouring off roadside hills flooded all lanes of Interstate Highway 76, knownlocally as the Schuylkill Expressway. Traffic was snarled in both directions.

Doppler radar rainfall estimates for eastern Pennsylvania showed widespreadamounts of 2-4 inches with some of the hardest-hit areas being on the northernand western side of greater Philadelphia. At Willow Grove, rainfall topped 4inches with heavy rain still pouring down.

Photo credit to WPVI-TV and PennDOTStory by AccuWeather.com Senior Meteorologist Jim Andrews