A quick moving Alberta Clipper type low pressure system brought a wintry mix to the local Philadelphia area and periods of snow to the rest of Eastern Pennsylvania on the 17th. Snowfall averaged 1 to 4 inches, with lower amounts in and around Philadelphia. Ice accumulations around the local Philadelphia area were less than five hundredths of an inch. Untreated roadways and walkways became slippery.
Around the local Philadelphia area, precipitation started as snow between 3 a.m. EST and 4 a.m. EST on the 17th. A precipitation break occurred between 630 a.m. EST and 930 a.m. EST. When precipitation started again, it was a wintry mix of sleet and freezing rain. Temperatures rose above freezing around Noon EST and the wintry mix changed over to plain rain. Then during the mid afternoon precipitation changed back to snow and ended during the late afternoon on the 17th. Across the rest of Eastern Pennsylvania, snow began between 3 a.m. EST and 5 a.m. EST and fell at its steadiest across the Lehigh Valley and Poconos. The snow fell moderately just before it ended in those areas. The snow ended around 3 p.m. EST on the afternoon of the 17th.
Representative snowfall included 4.0 inches in Palmerton (Carbon County), 3.5 inches in Slatington (Lehigh County) and Swiftwater (Monroe County), 3.2 inches in Bushkill Township (Northampton County), 3.0 inches in Boyertown (Berks County), 2.6 inches in Springtown (Bucks County), 2.5 inches in East Stroudsburg (Monroe County), 2.3 inches in Forks Township (Northampton County), 2.1 inches at the Lehigh Valley International Airport, 2.0 inches in Gilbertsville (Monroe County), Quakertown (Bucks County) and Sinking Spring (Berks County), 1.5 inches in Coatesville (Chester County) and Spring Mount (Montgomery County), 1.4 inches in Wayne (Delaware County), 1.3 inches in Warrington (Bucks County), 0.6 inches in Concord Township (Delaware County) and 0.1 inches at the Philadelphia International Airport.
The Alberta Clipper type low which caused the wintry precipitation moved eastnortheast from the lower Ohio Valley on the evening of the 16th and reached Lake Erie at 7 a.m. EST on the 17th. From there, a secondary low pressure system formed around the local Philadelphia area and moved off the central New Jersey coast during the middle of the afternoon on the 17th around the time precipitation was ending in Eastern Pennsylvania. This low became the primary low pressure system as it moved toward Long Island, New York the rest of that afternoon.

Winter Weather in BERKS, PENNSYLVANIA
From 17-DEC-13 04:00:00 to 17-DEC-13 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in CARBON, PENNSYLVANIA
From 17-DEC-13 04:00:00 to 17-DEC-13 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in DELAWARE, PENNSYLVANIA
From 17-DEC-13 03:00:00 to 17-DEC-13 16:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in EASTERN CHESTER, PENNSYLVANIA
From 17-DEC-13 03:00:00 to 17-DEC-13 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in EASTERN MONTGOMERY, PENNSYLVANIA
From 17-DEC-13 03:00:00 to 17-DEC-13 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LEHIGH, PENNSYLVANIA
From 17-DEC-13 04:00:00 to 17-DEC-13 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 17-DEC-13 04:00:00 to 17-DEC-13 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in MONROE, PENNSYLVANIA
From 17-DEC-13 04:30:00 to 17-DEC-13 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 17-DEC-13 03:30:00 to 17-DEC-13 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in PHILADELPHIA, PENNSYLVANIA
From 17-DEC-13 03:00:00 to 17-DEC-13 16:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in UPPER BUCKS, PENNSYLVANIA
From 17-DEC-13 04:00:00 to 17-DEC-13 15:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WESTERN MONTGOMERY, PENNSYLVANIA
From 17-DEC-13 04:00:00 to 17-DEC-13 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 17-DEC-13 03:00:00 to 17-DEC-13 14:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter