A lee side trof in combination with an upper air disturbance triggered clusters of showers and thunderstorms with torrential downpours to occur in southeast Pennsylvania during the late morning into the early afternoon on the 2nd. This caused urban, poor drainage and small creek flash flooding. Event precipitation totals reached between 1.0 and 3.5 inches in many areas in and around the local Philadelphia area and marred traveling plans on this Labor Day.

Flash Flood in BUCKS, PENNSYLVANIA
From 02-SEP-13 12:00:00 to 02-SEP-13 15:00:00 (EST-5)
Location: FOUNTAINVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorms with torrential downpours caused creek and poor drainage flash flooding in central Bucks County affecting Bedminster, Plumstead and Tinicum Townships  Doppler Radar storm total estimates reached between 2 and 4 inches in sections of those townships.

Flash Flood in PHILADELPHIA, PENNSYLVANIA
From 02-SEP-13 10:30:00 to 02-SEP-13 13:15:00 (EST-5)
Location: WEST PHILADELPHIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A Skywarn spotter reported that thunderstorms with very heavy downpours caused flash flooding along sections of Cobbs Creek bordering Delaware County.  While there are no established flood stages for gages along Cobbs Creek, it crested at 7.67 feet at Noon EDT on the 2nd at Lincoln Highway/City Avenue (U.S. Route 1) and at 13.72 feet at the Mount Moriah Cemetery at 215 p.m. EDT on the 2nd. Event precipitation totals included 1.89 inches at the Philadelphia International Airport.

Flash Flood in PHILADELPHIA, PENNSYLVANIA
From 02-SEP-13 09:30:00 to 02-SEP-13 11:30:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorms with very heavy downpours caused flash flooding in eastern and southeastern parts of Philadelphia. Doppler Radar storm total estimates reached 1 to 2 inches within the city.  Event precipitation totals included 1.89 inches at the Philadelphia International Airport.

Flash Flood in DELAWARE, PENNSYLVANIA
From 02-SEP-13 11:15:00 to 02-SEP-13 14:30:00 (EST-5)
Location: UPPER DARBY
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms with very heavy downpours caused flash flooding across central Delaware County with Springfield and Upper Darby Townships affected the hardest.  In Springfield Township, flash flooding along the Stony Creek backed into storm drains in the parking lot of BJ's Wholesalers on Woodland Avenue. The water reached up to five feet high and completely submerged some vehicles. About twenty water rescues were performed as fifty vehicles were affected in the parking lot.  Seven fire companies responded to the flooding. Specialized rescue boat water units were used to rescue people from their vehicles. Numerous roadways were flooded in the township and neighboring Upper Darby Township. One vehicle was swept into a flooded creek. The intersections of Normandy and Marshall Roads, Copley and Marshall Roads and Lansdowne Avenue and State Road were all flooded and closed for several hours. In Middletown Township, several water rescues occurred in the Lima area.  A Skywarn spotter also reported flooding along Cobbs Creek bordering Philadelphia.   Event precipitation totals included 3.59 inches in Swarthmore, 2.85 inches in Havertown, 2.00 inches in Drexel Hill and 1.89 inches at the Philadelphia International Airport.