A nor'easter that moved east of the state on the 25th dropped 2 to 5 inches of snow in the Philadelphia western suburbs and Berks County and 1 to 3 inches of snow elsewhere across Eastern Pennsylvania including Philadelphia. Most of the snow fell during the day and had difficulty accumulating when the intensity decreased. Nevertheless, the heaviest snow fell throughout the morning commute in the southeast part of the state and caused slushy roadways and traffic accidents. In Chester County, multiple accidents were reported along U.S. Route 202. In Delaware County, a tractor-trailer accident on Interstate 95 snarled the morning commute. In addition, a few school districts cancelled classes or had early dismissals and isolated power outages also occurred in the Philadelphia suburbs. West Chester University (Chester County) cancelled evening classes. The snow canceled some flights and caused delays exceeding one hour at the Philadelphia International Airport. The snow started between 6 a.m. and 8 a.m. EDT on the 25th and fell at its heaviest nearly instantly in the southeast part of the state and through the morning commute. The snow was generally lighter in intensity in the Poconos and Lehigh Valley. While snow continued during the late morning into the afternoon, the intensity was less and  it did not accumulate as efficiently. As precipitation intensity lessened even more, the snow changed to light rain during the late afternoon from the Lehigh Valley southward. Precipitation did not change to rain in the Poconos.  All of the precipitation ended during the evening of the 25th.
Representative snowfall included 4.5 inches in Glenmoore and East Nantmeal (Chester County), 4.0 inches in Chester Springs (Chester County), 3.9 inches in Mohnton (Berks County) and Nottingham (Chester County), 3.8 inches in Royersford (Montgomery County), 3.5 inches in Glen Mills (Delaware County), 3.3 inches in Kennett Square (Chester County), 3.2 inches in Wayne (Delaware County) and Gilbertsville (Montgomery County), 3.1 inches in West Chester (Chester County), 3.0 inches in Huffs Church (Berks County) and Exton (Chester County), 2.8 inches in Reading (Berks County), Brookhaven (Delaware County), Limerick (Montgomery County) and Spring City (Chester County), 2.5 inches in Summit Hill (Carbon County), Penndel (Bucks County) and Bernville (Berks County), 2.3 inches in Souderton (Montgomery County), 2.0 inches in Doylestown (Bucks County), Forks Township (Northampton County), Willow Grove (Montgomery County), Easton (Northampton County) and Tobyhanna (Monroe County), 1.8 inches in Wynnewood (Montgomery County), 1.6 inches in Schnecksville (Lehigh County), 1.5 inches in West Grove (Chester County) and Harleysville (Montgomery County), 1.4 inches in Quakertown (Bucks County), 1.2 inches in Rockledge (Philadelphia County), 1.1 inches at the Philadelphia International Airport, 1.0 inch in Bowmanstown (Carbon County), Palmerton (Carbon County) and Bethlehem (Northampton County) and 0.8 inches at the Lehigh Valley International Airport.

The low pressure system responsible for the late season snow moved from Alabama on the morning of the 24th northeast and passed just east of Norfolk, Virginia at 8 a.m. EDT on the 25th. It proceeded to move northeast and by 8 p.m. EDT on the 25th it was about 175 miles east of the New Jersey coast.  The combination of the relatively offshore storm track coupled with most of the precipitation falling during the day and in late March (relatively strong indirect sunlight) prevented heavier snow from occurring or accumulating.

Winter Weather in CARBON, PENNSYLVANIA
From 25-MAR-13 07:00:00 to 25-MAR-13 22:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in MONROE, PENNSYLVANIA
From 25-MAR-13 07:00:00 to 25-MAR-13 22:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LEHIGH, PENNSYLVANIA
From 25-MAR-13 06:00:00 to 25-MAR-13 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 25-MAR-13 06:00:00 to 25-MAR-13 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in BERKS, PENNSYLVANIA
From 25-MAR-13 05:00:00 to 25-MAR-13 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in PHILADELPHIA, PENNSYLVANIA
From 25-MAR-13 05:00:00 to 25-MAR-13 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in DELAWARE, PENNSYLVANIA
From 25-MAR-13 05:00:00 to 25-MAR-13 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 25-MAR-13 04:00:00 to 25-MAR-13 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in EASTERN CHESTER, PENNSYLVANIA
From 25-MAR-13 05:00:00 to 25-MAR-13 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in WESTERN MONTGOMERY, PENNSYLVANIA
From 25-MAR-13 05:00:00 to 25-MAR-13 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in EASTERN MONTGOMERY, PENNSYLVANIA
From 25-MAR-13 05:00:00 to 25-MAR-13 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in UPPER BUCKS, PENNSYLVANIA
From 25-MAR-13 06:00:00 to 25-MAR-13 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 25-MAR-13 06:00:00 to 25-MAR-13 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter