One to two inches of snow accumulated across southwest and northern New Jersey during the afternoon ane evening of the 17th before it changed to rain. Precipitation changed to freezing rain in Sussex County.
Snow began falling across the state during the afternoon of the 17th.  It started first in the southwest part of the state a little after Noon EST, but took almost until the evening to start in the northern part of the state. In some places precipitation did start as rain before the intensity increased and changed it to snow. In the southeastern part of the state, that transition back to snow was short-lived and it was raining by late afternoon. As warmer air moved in aloft, the snow changed to rain around 6 p.m. EST in the local Philadelphia suburbs, and as late as 9 p.m. EST in the Raritan Basin and central New Jersey. Across northwest New Jersey, the change to rain occurred around Midnight EST on the 18th, except in Sussex County where precipitation changed to freezing rain. The rain and freezing rain ended overnight. In addition to the snow, ice accretions averaged around one-tenth of an inch in Sussex County.

Actual accumulations included 2.2 inches in Newton (Sussex County), 2.1 inches in Stewartsville (Warren County), 2.0 inches in Blairstown (Warren County), 1.8 inches in Glassboro (Gloucester County) and Branchburg (Somerset County), 1.7 inches in Hillsborough (Somerset County), 1.6 inches in Whitehouse Station (Hunterdon County), 1.5 inches in Ewing (Mercer County) and Whippany (Morris County), 1.4 inches in Somerdale (Camden County), 1.3 inches in Cranbury (Middlesex County), 1.2 inches in Edgewater Park (Burlington County), 1.1 inches in Hammonton (Atlantic County) and 1.0 inch in Maple Shade (Burlington County).
The precipitation was caused by a low pressure system that moved northeast from Florida early in the morning on the 17th to near Myrtle Beach, South Carolina at 1 p.m. EST on the 17th, Cape Hatteras, North Carolina at 7 p.m. EST on the 17th, just east of Wallops Island, Virginia at 1 a.m. EST on the 18th and eastern Long Island, New York at 7 a.m. EST on the 18th. The surface high pressure system was already east of the region before the precipitation arrived and the position made it tough for the cold air to remained locked in near the surface. The only place where temperatures remained below freezing was in Sussex County.

Winter Weather in GLOUCESTER, NEW JERSEY
From 17-JAN-08 13:00:00 to 17-JAN-08 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in CAMDEN, NEW JERSEY
From 17-JAN-08 13:30:00 to 17-JAN-08 18:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHWESTERN BURLINGTON, NEW JERSEY
From 17-JAN-08 14:00:00 to 17-JAN-08 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in MERCER, NEW JERSEY
From 17-JAN-08 15:00:00 to 17-JAN-08 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in MIDDLESEX, NEW JERSEY
From 17-JAN-08 15:00:00 to 17-JAN-08 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in SOMERSET, NEW JERSEY
From 17-JAN-08 15:00:00 to 17-JAN-08 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in HUNTERDON, NEW JERSEY
From 17-JAN-08 14:00:00 to 17-JAN-08 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WARREN, NEW JERSEY
From 17-JAN-08 15:00:00 to 18-JAN-08 00:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in MORRIS, NEW JERSEY
From 17-JAN-08 16:00:00 to 18-JAN-08 00:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in SUSSEX, NEW JERSEY
From 17-JAN-08 16:00:00 to 18-JAN-08 04:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in SALEM, NEW JERSEY
From 17-JAN-08 12:00:00 to 17-JAN-08 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter