A low pressure system that moved off the North Carolina coast dropped 2 to 5 inches of snow across the Raritan Basin and Northwest New Jersey, around one inch in Mercer County and little if any elsewhere in New Jersey.   Precipitation started as snow across southwest and most of the northern half of New Jersey during the morning of the 29th. In the southwest part of the state, the snow changed to rain by Noon EST.  In Mercer and Middlesex Counties, the snow changed to rain during the afternoon of the 29th. In the rest of the Raritan Basin as well as northwest New Jersey,  precipitation fell as snow throughout the event. The snow fell at its heaviest during the first half of the afternoon and ended during the evening of the 29th. In spite of the 29th being a Saturday, the snow caused numerous traffic accidents.
Representative snowfall included 4.8 inches in Flemington (Hunterdon County), 4.5 inches in Wantage (Sussex County), 4.3 inches in Parsippany (Morris County), 4.2 inches in Blairstown (Warren County), 4.0 inches in Whippany (Morris County) and Basking Ridge (Somerset County), 3.9 inches in Broadway (Warren County), 3.7 inches in Hackettstown and Stewartsville (Warren County), 3.5 inches in Whitehouse Station (Hunterdon County) and Sparta (Sussex County), 3.3 inches in Bridgewater Township (Somerset County), 3.2 inches in Rockaway (Morris County), 2.5 inches in Hopewell (Mercer County), 1.5 inches in Edison (Middlesex County), 1.2 inches in Ewing (Mercer County) and 0.8 inches in Trenton (Mercer County). The snow was caused by a low pressure system that moved from the Texas coast on the morning of the 28th, to southern North Carolina on the morning of the 29th. From there it intensified as it move northeast and passed just east of Cape Hatteras on the afternoon of the 29th and south of Cape Cod on the evening of the 29th. Warmer air was able to move in and change the snow to rain in the southwest and central parts of New Jersey, but sufficient cold air remained in place for precipitation to fall as snow throughout the event farther to the northwest.

Winter Weather in MORRIS, NEW JERSEY
From 29-DEC-12 09:00:00 to 29-DEC-12 22:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in SUSSEX, NEW JERSEY
From 29-DEC-12 09:30:00 to 29-DEC-12 22:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WARREN, NEW JERSEY
From 29-DEC-12 10:00:00 to 29-DEC-12 22:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in MIDDLESEX, NEW JERSEY
From 29-DEC-12 11:00:00 to 29-DEC-12 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in MERCER, NEW JERSEY
From 29-DEC-12 10:00:00 to 29-DEC-12 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in HUNTERDON, NEW JERSEY
From 29-DEC-12 10:00:00 to 29-DEC-12 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in SOMERSET, NEW JERSEY
From 29-DEC-12 11:00:00 to 29-DEC-12 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter