A complex winter storm that buried Long Island and southern New England under heavy snow and blizzard conditions spared Eastern Pennsylvania as the area was too far west to receive heavier wrap-around snow from it and the area was affected just as much, if not more, by a clipper low pressure system that preceded it from the west. Total snowfall on the 26th and 27th averaged one to four inches with some higher amounts in Bucks County. Snow began falling during the evening and overnight on the 25th. In the local Philadelphia area, the precipitation started briefly as rain that evening before changing to snow. While it snowed most of the day on the 26th, there were times when it briefly stopped or the intensity was very light. The snow ended on the morning of the 27th, except in the Poconos where it ended that afternoon.
In anticipation of a greater impact, Philadelphia Mayor Michael Nutter announced a snow emergency. Pennsylvania Governor Tom Wolf declared a disaster emergency. All 622 flights out of Philadelphia International Airport were cancelled on the 27th. There were 421 flight cancellations on the 26th.  All schools  and city offices in Philadelphia were closed on the 27th. Many suburban schools and municipalities followed suit.  SEPTA Regional Rail Service in southeastern Pennsylvania implemented a special (reduced) snow schedule on the 26th and 27th. Amtrak reduced the frequency of trains along the Northeast Corridor. On the 26th, many schools dismissed early and canceled after school activities. Local governments and school administrators cancelled public meetings. West Chester University (Chester County) cancelled all evening classes. On the 27th, Berks County schools had delayed openings.
Representative snowfall included 5.4 inches in Furlong (Bucks County), 4.0 inches in Langhorne (Bucks County), Forks Township (Northampton County) and Pocono Summit (Monroe County), 3.3 inches in East Nantmeal (Chester County) and King of Prussia (Montgomery County), 3.2 inches in Saylorsburg (Monroe County), 2.5 inches in Center Valley (Lehigh County), 2.1 inches in Bowmanstown (Carbon County) and Martins Creek (Northampton County), 2.0 inches in Royersford (Montgomery County) and Wynnewood (Montgomery County), 1.9 inches at the Lehigh Valley International Airport, 1.8 inches in Garnet Valley (Delaware County), 1.7 inches in Spring City (Chester County), 1.5 inches in Palmerton (Carbon County) and Northeast Philadelphia, 1.2 inches at the Philadelphia International Airport, 1.1 inches in Mohnton (Berks County) and 1.0 inch in Nottingham (Chester County) and Chadds Ford (Delaware County).

The first low pressure system formed in Saskatchewan Province on the 24th. It proceeded to move southeast and passed through Iowa early on the 25th. It reached the lower Ohio Valley on the evening of the 25th as an arctic cold front was starting to move south through Delaware. The low pressure system reached West Virginia on the morning of the 26th as a secondary low pressure system was forming on the North Carolina coast.  At 1 p.m. EST on the 26th, double barrel low pressure systems existed with the original still over West Virgina and an already stronger secondary (998 millibars) east of the Virginia coast. The former low pressure system moved into western Pennsylvania that evening while the latter low pressure system was already about 150 miles east of the Delmarva Peninsula. Later that evening the original low pressure system dissipated while the secondary low pressure system took a turn more to the north and started to intensify rapidly. At 7 a.m. EST on the 27th, that low pressure system had deepened to 975 millibars and was located southeast of Nantucket, Massachusetts. From there, the low pressure system started to slowly weaken as it drifted off to the northeast. While heavier snow tried to back into Pennsylvania overnight on the 26th, the offshore track was too east for it to reach the state. It was estimated that the storm caused 500 million to 1.25 billion dollars in unrecoverable lost productivity and economic activity in the Northeast.

Winter Weather in BERKS, PENNSYLVANIA
From 25-JAN-15 21:00:00 to 27-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in UPPER BUCKS, PENNSYLVANIA
From 26-JAN-15 00:00:00 to 27-JAN-15 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 26-JAN-15 00:00:00 to 27-JAN-15 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Winter Weather in CARBON, PENNSYLVANIA
From 26-JAN-15 02:00:00 to 27-JAN-15 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 25-JAN-15 22:00:00 to 27-JAN-15 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in EASTERN CHESTER, PENNSYLVANIA
From 25-JAN-15 23:00:00 to 27-JAN-15 10:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in DELAWARE, PENNSYLVANIA
From 25-JAN-15 23:30:00 to 27-JAN-15 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in PHILADELPHIA, PENNSYLVANIA
From 25-JAN-15 23:30:00 to 27-JAN-15 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LEHIGH, PENNSYLVANIA
From 26-JAN-15 02:00:00 to 27-JAN-15 06:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 26-JAN-15 02:00:00 to 27-JAN-15 06:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WESTERN MONTGOMERY, PENNSYLVANIA
From 25-JAN-15 23:00:00 to 27-JAN-15 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in EASTERN MONTGOMERY, PENNSYLVANIA
From 25-JAN-15 23:30:00 to 27-JAN-15 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Winter Weather in MONROE, PENNSYLVANIA
From 26-JAN-15 02:00:00 to 27-JAN-15 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS