A very potent Alberta low pressure system dropped heavy snow cross Eastern Pennsylvania on the 22nd
and 23rd. Accumulations ranged from 8 to 16 inches with the highest amounts in Montgomery, Philadelphia and Bucks Counties.
The winter storm was caused by a very powerful Alberta low pressure system. This type of low rarely
produce snowfalls of this intensity. This low moved southeast from eastern Montana on the morning of the 21st to southern
Minnesota on the evening of the 21st to near Dayton, Ohio around sunrise on the 22nd. It then moved to just south of Erie,
Pennsylvania on the afternoon of the 22nd. A secondary low pressure system formed over lower Chesapeake Bay on the afternoon
of the 22nd. It would become the main low over the next twelve hours as it intensified over the nearby Atlantic Ocean. It
deepened quickly as it passed near the Nantucket, Massachusetts buoy at 7 a.m. EST on the 23rd.
Snow began falling during the late morning of the 22nd, fell at its heaviest during the second half
of the afternoon and early part of the evening of the 22nd. The snow ended during the morning of the 23rd, except in the Poconos
where it lingered into the afternoon.
Specific snowfall accumulations 15.8 inches in Yardley (Bucks County), 14.9 inches in Forks Township
(Northampton County), 13.6 inches in Radnor (Delaware County), 13.5 inches in Conshohocken (Montgomery County), 13.4 inches
in northeast Philadelphia, 13.0 inches in Albrightsville (Carbon County) and Langhorne (Bucks County), 12.6 inches at the
Philadelphia International Airport, 12.0 inches in Perkasie (Bucks County) and Easton (Northampton County), 11.8 inches in
Phoenixville (Chester County), 11.5 inches in Lehighton (Carbon County), 11.0 inches in Boothwyn (Delaware County), Palm and
Green Lane (Montgomery County) and Saylorsburg (Monroe County), 10.6 inches at the Lehigh Valley International Airport, 10.2
inches in Germansville (Lehigh County), 10.0 inches in Morgantown (Berks County) and Pocono Summit (Monroe County) and 8.0
inches in Honey Brook (Chester County)