A winter storm that featured a potpourri of precipitation types affected Eastern Pennsylvania from the afternoon of the 25th into the early morning of the 26th. Snowfall accumulations averaged 1 to 3 inches. Ice accretions occurred from the Lehigh Valley southeastward and averaged one-tenth to one-quarter of an inch with the highest accretions in Philadelphia and its Pennsylvania suburbs. Precipitation started as snow during the afternoon of the 25th. In the local Philadelphia area, the snow changed to sleet and freezing rain during the early evening. Precipitation fell as freezing rain from the middle of the evening onward until it changed to plain rain around 2 a.m. EST on the 26th. In Berks County and the Philadelphia Pennsylvania suburbs, the snow changed to sleet and freezing rain during the middle of the evening and then to just freezing rain in the late evening. Temperatures never rose above freezing and precipitation ended as freezing rain. Some locations in Berks County changed back to snow before precipitation ended. In the Lehigh Valley, the snow changed to sleet and freezing rain around Midnight EST on the 26th and then changed back to snow before it ended. In the Poconos, precipitation fell as mainly snow. All precipitation ended across the eastern part of the state between 3 a.m. and 6 a.m. EST.
Untreated roads and walkways were hazardous. Several suburban Philadelphia municipalities declared snow emergencies. The snow did accumulate on road surfaces as the weather had remained unseasonably cold and many accidents occurred. In Delaware County, Interstate 95 was closed near the Delaware state border for 30 minutes after a vehicle struck a guard rail and spun across the roadway. Many accidents also occurred on Interstate 95 in Bucks County. Some vehicles flipped over across the county. In Montgomery County, several accidents shut down Westbound Route 422 at the Armand-Hammer Boulevard Interchange. In Chester County, portions of Pennsylvania State Route 100 (in Exton) and northbound and southbound lanes of U.S. Route 202 were closed because of multiple accidents. Multiple accidents also occurred on the Pennsylvania Turnpike between Morgantown (Berks County) and Norristown (Montgomery County). In Lehigh County, accidents on Interstate 78 caused a closure and detours. Two serious crashes in Lynn Township on Pennsylvania State Route 143 caused the road to be closed until the afternoon of the 26th.  Schools in the Poconos had two hour delayed openings on the 26th, a couple in Carbon County were closed. Two hour delayed openings occurred as far south as Montgomery County.

Snowfall accumulations included 3.2 inches in Middle Smithfield (Monroe County), 3.0 inches in Phoenixville (Chester County) and Lehighton (Carbon County), 2.5 inches in Havertown (Delaware County) and Downingtown (Chester County), 2.2 inches at the Lehigh Valley International Airport, 2.1 inches in Palm (Montgomery County), 2.0 inches in Riegelsville (Bucks County) and Wynnewood (Montgomery County), 1.8 inches in Martins Creek (Northampton County), 1.7 inches in Sinking Spring (Berks County) and 1.5 inches at the Philadelphia International Airport and Neshaminy Falls (Bucks County).
The low pressure system that caused the winter storm moved northeast from the foothills of the central Rockies on the morning of the 24th. At 7 p.m. EST on the 24th it reached Kansas City, Kansas City and then northeastern Iowa at 7 a.m. EST on the 25th. A secondary low pressure system started forming on the primary low's warm front in South Carolina during the early afternoon of the 25th. At 7 p.m. EST the secondary low was near Raleigh, North Carolina, while the primary low pressure system was weakening near Chicago, Illinois. At 1 a.m. EST on the 26th, the secondary low pressure system was just east of the Delaware coast and at 7 a.m. EST that morning was already well southeast of Cape Cod, Massachusetts. While warm air continued to move in aloft because of the circulation associated with the primary low pressure system, the formation and deepening of the secondary low pressure system slowed the advancement of warmer air near the surface and prolonged the duration of sleet and freezing rain inland, especially in southeastern Pennsylvania. The secondary low pressure system moved offshore too quickly to bring heavy snow into the Lehigh Valley and the Poconos.

Winter Weather in CARBON, PENNSYLVANIA
From 25-FEB-07 16:00:00 to 26-FEB-07 06:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in MONROE, PENNSYLVANIA
From 25-FEB-07 16:00:00 to 26-FEB-07 06:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LEHIGH, PENNSYLVANIA
From 25-FEB-07 16:00:00 to 26-FEB-07 04:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-07 16:00:00 to 26-FEB-07 04:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in BERKS, PENNSYLVANIA
From 25-FEB-07 13:00:00 to 26-FEB-07 04:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in CHESTER, PENNSYLVANIA
From 25-FEB-07 13:00:00 to 26-FEB-07 03:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in DELAWARE, PENNSYLVANIA
From 25-FEB-07 14:00:00 to 26-FEB-07 02:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in PHILADELPHIA, PENNSYLVANIA
From 25-FEB-07 14:00:00 to 26-FEB-07 02:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in BUCKS, PENNSYLVANIA
From 25-FEB-07 14:00:00 to 26-FEB-07 04:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in MONTGOMERY, PENNSYLVANIA
From 25-FEB-07 14:00:00 to 26-FEB-07 04:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter