An area of low pressure moved from the northern Plains on November 17th toward the Mid Atlantic States on the 18th, with a warm front draped from Ohio to southern Delaware. Another area of low pressure however developed off the coast of Virginia during the 18th and then moved out to sea on the 19th and into the 20th. A surface trough however bridged the two areas of low pressure. Meanwhile, an upper-level low tracked across the upper Ohio Valley and right across Pennsylvania late on the 19th, however it was weakening with time. This brought the first widespread accumulating snowfall of the season to northeastern Pennsylvania and even to some areas a little farther south. This storm was elevation dependent to some extent, as temperatures in the lower elevations were just above freezing during most of the event. The snow that did accumulate was heavy and wet and caused nearly 13,000 homes and businesses to lose power in the Lehigh Valley (where some trees still had leaves) and the Poconos. The storm system gradually moved off to the east on the 19th, bringing an end to the widespread precipitation.
Snow began falling in the Poconos just after Midnight EST on the 18th and fell heavy at times during the evening and night. The snow ended during the early afternoon on the 19th. In the Lehigh Valley, snow began falling around 7 a.m. EST on the 18th, but did not accumulate as efficiently as the Poconos as temperatures were at or above freezing. Most of the accumulating snow was over by sunrise on the 19th, but the snow did not end until around Noon EST on the 19th. In Berks County and upper Bucks County, precipitation started as rain during the morning of the 18th. The rain changed to snow during the afternoon of the 18th in Berks County and the evening of the 18th in upper Bucks County. It ended during the morning of the 19th. Accumulations were very elevation dependent and ranged from only an inch or two in the valleys to around ten inches in the higher terrain of the Poconos.
In The Poconos, fallen trees caused about 6,000 homes and businesses to lose power. Power was not completely restored until the afternoon of the 20th. In Smithfield Township (Monroe County), two sixty-five foot red oak trees were downed by the snow onto the deck of one home. A large limb also damaged the chimney of that home. Fallen trees blocked several roads. In Monroe County, reported power outages caused by downed trees included Middle Smithfield, Smithfield, Hamilton and Ross Townships.  Throughout the Poconos, most schools had delayed openings on the 19th (a Monday); a few were closed for the day. Many accidents were caused by the snow. In the Lehigh Valley, about 7,000 homes and businesses lost ower, mainly in Allentown and Bethlehem. Half of the outages were restored on the morning of the 19th, but power was not completely restored until the afternoon of the 20th.
Specific accumulations included (and were very elevation dependent): 11.0 inches in Blakeslee (Monroe County), 10.0 inches in Tobyhanna (Monroe County) and Albrightsville (Carbon County), 7.0 inches in Summit Hill (Carbon County), East Stroudsburg (Monroe County),  Fredericksville and Stony Run (Berks County), 6.5 inches in New Tripoli (Lehigh County), 6.0 inches in Williams Township (Northampton County), 4.0 inches in Lehighton (Carbon County), 3.2 inches at the Lehigh Valley International Airport, 2.5 inches in Elverson (Chester County), 2.0 inches in Boyertown (Berks County) and East Nantmeal (Chester County), 1.0 inch in Morgantown (Berks County), 0.6 inches in Martins Creek (Northampton County) and only a trace in Doylestown (Bucks County) and Royersford (Montgomery County).

Heavy Snow in MONROE, PENNSYLVANIA
From 18-NOV-07 00:00:00 to 19-NOV-07 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in CARBON, PENNSYLVANIA
From 18-NOV-07 00:00:00 to 19-NOV-07 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in BERKS, PENNSYLVANIA
From 18-NOV-07 13:00:00 to 19-NOV-07 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LEHIGH, PENNSYLVANIA
From 18-NOV-07 07:00:00 to 19-NOV-07 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 18-NOV-07 07:00:00 to 19-NOV-07 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in BUCKS, PENNSYLVANIA
From 18-NOV-07 18:00:00 to 19-NOV-07 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter