The New Year began on a very wet note across Eastern Pennsylvania as a deep southerly flow from the Gulf of Mexico helped drop heavy rain across the state. Rain began falling around the start of the New Year and ended during by the early afternoon. The heaviest rain fell in and around the local Philadelphia area. This caused poor drainage flooding, as well as flooding of some of the creeks and streams in southeastern Pennsylvania. Storm totals averaged 1 to 2 inches with the lightest amounts in the Poconos and Lehigh Valley.
The slow moving frontal system that wrung the heavy rain across the region moved from the Tennessee Valley on the morning of December 31st, east to the Ohio Valley and southern Appalachians at 7 p.m. EST on the 31st, to the central Appalachians at 1 a.m. EST on January 1st. As the front started to cross the Pennsylvania, Maryland and West Virginia Appalachians during the morning of January 1st, a low pressure system formed on the triple point of the occluded front in northeastern Virginia around 7 a.m. EST on January 1st. The low pressure system then moved northeast through the Delmarva Peninsula and into New Jersey by the early afternoon of January 1st. At 7 p.m. EST on January 1st, the low pressure system reached western Long Island.

Flood in CHESTER, PENNSYLVANIA
From 01-JAN-07 09:59:00 to 01-JAN-07 14:37:00 (EST-5)
Location: DOWNINGTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The heavy rain caused sections of both the East and West Branch of the Brandywine Creek to flood. The West Branch of the Brandywine Creek at Honey Brook was above its 7 foot flood stage from 1008 a.m. EST through 1 p.m. EST on the 1st. It crested at 7.34 feet at 1115 a.m. EST. The East Branch of the Brandywine Creek at Downingtown was above its 7 foot flood stage from 959 a.m. EST through 237 p.m. EST on the 1st. It crested at 8.59 feet at Noon EST. Storm totals within Chester County included 1.94 inches in Honey Brook, 1.78 inches in Glenmoore, 1.75 inches in Coatesville, 1.49 inches in Valley Forge and 1.46 inches in Exton.

Flood in MONTGOMERY, PENNSYLVANIA
From 01-JAN-07 08:12:00 to 01-JAN-07 17:03:00 (EST-5)
Location: SCHWENKSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The heavy rain caused sections of both the East Branch of the Perkiomen Creek and the Wissahickon Creek to flood. The Pennypack creek also flooded downstream in Philadelphia. The East Branch of the Perkiomen Creek in Upper Salford Township flooded over Old Sumneytown Pike.  In Pottstown, heavy rain caused flooding on Industrial Highway near South Hanover Street. The East Branch of the Perkiomen Creek at Schwenksville was above its 7 foot flood stage from 812 a.m. through 503 p.m. EST on the 1st. It crested at 8.68 feet at 130 p.m. EST. The Wissahickon Creek at Fort Washington was above its 9 foot flood stage from 919 a.m. EST through 126 p.m. EST on the 1st. It crested at 9.89 feet at 1045 a.m. EST. Storm totals within Montgomery County included 2.04 inches in Graterford, 2.02 inches in Pottstown, 1.80 inches in Wynnewood, 1.76 inches in Green Lane and 1.72 inches in Palm.

Flood in PHILADELPHIA, PENNSYLVANIA
From 01-JAN-07 11:10:00 to 01-JAN-07 16:47:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The heavy rain caused both the Wissahickon and Pennypack Creeks to flood in Philadelphia. The heavy rain also forced the postponement of the Mummers Parade. The Wissahickon Creek at its mouth was above its 5 foot flood stage from 107 p.m. EST through 447 p.m. EST on the 1st. It crested at 5.34 feet at 3 p.m. EST. The Pennypack Creek at the Rhawn Street Bridge was above its 7 foot flood stage from 1110 a.m. EST through 1226 p.m. EST on the 1st. It crested at 7.11 feet at 1215 p.m. EST. Storm totals within Philadelphia included 2.03 inches at the Northeast Philadelphia Airport, 1.66 inches at the Fairmont Dam and 1.45 inches at the Philadelphia International Airport.

Flood in BUCKS, PENNSYLVANIA
From 01-JAN-07 07:15:00 to 01-JAN-07 09:29:00 (EST-5)
Location: DUBLIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The heavy rain caused flooding along the East Branch of the Perkiomen Creek in upper Bucks County. The East Branch of the Perkiomen Creek at Dublin was above its 5 foot flood stage from 715 a.m. EST through 929 a.m. EST on the 1st. It crested at 5.7 feet at 815 a.m. EST. Storm totals from Bucks County included 2.32 inches in Sellersville, 2.01 inches in Perkasie, 1.94 inches in Neshaminy Falls and 1.69 inches in Doylestown.