The runoff from heavy rain during the late morning and early afternoon caused flash flooding of smaller streams, basement and poor drainage flooding mainly across extreme eastern Pennsylvania. Flooding later that afternoon and evening occurred across a few of the larger streams and creeks. Numerous vehicles drove around barricades and motorists had to be rescued. Rain began falling during the afternoon on the 7th and did not end until the early evening on the 8th. It fell at its heaviest between 10 a.m. EST and 3 p.m. EST on the 8th. Storm totals averaged around one to three inches with the highest amounts toward New Jersey.
The heavy rain was caused by a low pressure system that developed in the northeastern Gulf of Mexico on the 7th. It deepened to a 997 millibar low by the time it moved slowly northeast into West Virginia at 7 a.m. EST on the 8th. At 1 p.m. EST on the 8th, there were a pair of 992 millibar lows, one near Pittsburgh, Pennsylvania and the other in northern Virginia. At 4 p.m. EST on the 8th, they combined into one over southeast Pennsylvania and deepened to 987 millibars. At 7 p.m. EST the low had deepened to 985 millibars and was near New York City. Its associated cold front had cleared Delaware and New Jersey and ended the rain.

Flash Flood in PHILADELPHIA, PENNSYLVANIA
From 08-MAR-08 12:53:00 to 08-MAR-08 15:00:00 (EST-5)
Location: ROXBOROUGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Flash flood waters entered the basement of the Hillside Garden Complex. Three families had water in their apartments and were assisted by the Red Cross. Basement flooding was also reported in Roxborough. The runoff from the heavy rain and the onshore flow also caused minor tidal flooding along the Delaware River and tidal sections of its tributaries between 2 p.m. EST and 3 p.m. EST. The high tide in Philadelphia reached 8.44 feet above mean lower low water and minor tidal flooding starts at 8.2 feet above mean lower low water. The Frankford Creek at Castor Avenue was above its 7 foot flood stage from 1253 p.m. EST through 213 p.m. EST on the 8th. It crested at 7.82 feet at 115 p.m. EST. Event precipitation totals included 2.44 inches in Pine Valley, 2.37 inches at the Franklin Institute, 2.28 inches at the Northeast Philadelphia Airport and 2.05 inches at the Philadelphia International Airport.

Flood in PHILADELPHIA, PENNSYLVANIA
From 08-MAR-08 18:27:00 to 09-MAR-08 00:49:00 (EST-5)
Location: MANAYUNK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Runoff from the heavy rain caused flooding along the Wissahickon Creek.  The Wissahickon Creek at its mouth was above its 5 foot flood stage from 627 p.m. EST on the 8th through 1249 a.m. EST on the 9th. It crested at 5.73 feet at 1030 p.m. EST on the 8th. Event precipitation totals included 2.44 inches in Pine Valley, 2.37 inches at the Franklin Institute, 2.28 inches at the Northeast Philadelphia Airport and 2.05 inches at the Philadelphia International Airport.

Flash Flood in NORTHAMPTON, PENNSYLVANIA
From 08-MAR-08 14:00:00 to 08-MAR-08 17:00:00 (EST-5)
Location: EASTON ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

The heavy rain caused roadway flooding and stream flooding. A woman was rescued from her stranded vehicle in Zucksville Road in Forks Township. Event precipitation totals included 2.53 inches in Tatamy, 2.18 inches in Forks Township, 1.72 inches in Walnutport and 1.52 inches in Bethlehem.

Flood in MONTGOMERY, PENNSYLVANIA
From 08-MAR-08 16:30:00 to 08-MAR-08 22:53:00 (EST-5)
Location: FT WASHINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Runoff from the heavy rain continued flooding into the evening along sections of the East Branch of the Perkiomen Creek and the Wissahickon Creek. The Wissahickon Creek at Fort Washington was above its 9 foot flood stage from 308 p.m. EST through 719 p.m. EST on the 8th. It crested at 10.53 feet at 515 p.m. EST. The East Branch of the Perkiomen Creek at Schwenksville was above its 7 foot flood stage from 514 p.m. EST through 1153 p.m. EST on the 8th. It crested at 8.14 feet at 9 p.m. EST. Event precipitation totals included 2.26 inches in Hatboro, 2.01 inches in Pottstown and 1.76 inches in Hatfield.

Flood in BUCKS, PENNSYLVANIA
From 08-MAR-08 16:00:00 to 09-MAR-08 01:22:00 (EST-5)
Location: LANGHORNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The runoff from the heavy rain caused flooding to continue into the night of the 8th along the Nesahminy Creek. The Neshaminy Creek at Langhorne was above its 9 foot flood stage from 309 p.m. EST on the 8th through 122 a.m. EST on the 9th. It crested at 10.28 feet at 630 p.m. EST on the 8th. While the gaged site at Trenton (Mercer County, New Jersey) stayed below flood stage, River Road and some basements were flooded in Yardley. Some minor flooding also occurred along the Delaware River in Bridgeton. Event precipitation totals included 2.70 inches in Southampton, 2.38 inches in Newtown, 2.34 inches in Perkasie, 2.26 inches in Neshaminy Falls and 1.85 inches in Springtown.

Flash Flood in BUCKS, PENNSYLVANIA
From 08-MAR-08 14:02:00 to 08-MAR-08 16:00:00 (EST-5)
Location: BRISTOL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Runoff from the heavy rain caused flash flooding along the East Branch of the Perkiomen Creek as well as started flooding along the Neshaminy Creek. Creek flooding occurred along Chatham Avenue in Falls Township. Roadway flooding occurred on Street Road in and around Bensalem. The East Branch of the Perkiomen Creek was above its 5 foot flood stage from 202 p.m. EST through 345 p.m. EST on the 8th. It crested at 5.55 feet at 245 p.m. EST. The Neshaminy Creek at Langhorne started flooding at 309 p.m. EST on the 8th. Please refer to the flood entry for Bucks County for further details. Event precipitation totals included 2.70 inches in Southampton, 2.38 inches in Newtown, 2.34 inches in Perkasie, 2.26 inches in Neshaminy Falls and 1.85 inches in Springtown.

Flash Flood in MONTGOMERY, PENNSYLVANIA
From 08-MAR-08 15:00:00 to 08-MAR-08 16:30:00 (EST-5)
Location: BRYN ATHYN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A woman was rescued from flood waters surrounding her stranded vehicle near the Pennypack Creek in Upper Moreland Township. Flooding also started along the Wissahickon Creek in the Fort Washington area. Event precipitation totals included 2.26 inches in Hatboro, 2.01 inches in Pottstown and 1.76 inches in Hatfield.