A wintry mix of sleet and freezing rain fell across most of northwest New Jersey on the 1st. Sleet accumulations ranged up to around an inch in Sussex County. Ice accretions reached up to around half an inch in Sussex County. The northwestern part of the state was hit hardest as a series of accidents occurred but very few serious injuries were reported. Throughout the day about 107 reported accidents occurred between 5:00 AM EST to 4:00 PM EST in northern New Jersey. New Jersey State Police reported about 50 accidents in the northwest part of the state between 6:00 AM EST and 9:00 AM EST. A few school districts never opened for the day.

Precipitation began as a mixture of sleet and freezing rain between 6 a.m. and 8 a.m. EST across northwest New Jersey. Elsewhere, temperatures were above freezing as precipitation arrived. As warm air moved in northward at the surface, the freezing rain changed to plain rain by Noon EST across most of Hunterdon County, but took until the afternoon for this to occur in Warren, Morris and Sussex Counties. Ice accretions averaged around one quarter of an inch, except around half an inch in Sussex County and parts of Morris County. The rain ended during the evening of the 1st.
In Sussex County, in Hopatcong, an unoccupied school bus slid off the road and hit a parked car. Montague police responded to a one-vehicle accident on U.S. Route 206 shortly before Noon EST that sent the driver of the car to Morristown Hospital with multiple spinal and pelvic fractures. In Morris County, more than 60 accidents were reported; roads were shut down and power was lost in some areas. Slick roads in Kinnelon lead to about 10 accidents, including one at 11:00 AM EST in which a car slid into a house on Kinnelon Road. No serious injuries were reported. Some power outages were reported. The most disruptive accident occurred on Interstate 80 West in Mount Olive at 7:30 AM EST. A tractor-trailer jack-knifed and leaked fuel. The road was closed for some time but reopened by late morning. Between Mount Olive and Mount Arlington, about 15 spinouts were reported during the morning rush. Jefferson Police reported 9 accidents. Parts of New Jersey State Route 15 in Jefferson were shut down because of icy conditions reported on Weldon Road just before a steep hill, along with several accidents. There were numerous spinouts reported as well. Randolph Police also closed parts of New Jersey State Route 10 West to clear accidents at Franklin and Dover-Chester Roads at around 9:00 AM EST. The road was also closed in both directions later in the day at Canfield Avenue for several hours after a car hit a utility pole at 3:00 PM EST. In Rockaway Township, 20 fender benders occurred between 8:12 AM EST and 8:30 AM EST, including an overturned truck on Richard Mine Road that took out a telephone pole. Six people were taken to local hospitals with minor injuries, including two detectives who tried to block off Mount Pleasant Avenue only to slide into a telephone pole. Jersey Central Power and Light reported 5,000 customers without power in Morris County and 7,500 total in northern New Jersey. The most outages were in Dover, Chester, and Randolph. In Hunterdon County, towns experienced problems with black ice on the roads early in the morning of the 1st. In Lebanon Township, four ice-related accidents occurred between 7:10 AM EST and 8:30 AM EST (three on one road).
The low pressure system that caused the wintry mix moved from Mississippi on the evening of January 31st northeast through the Ohio valley on the morning of February 1st. It reached western Pennsylvania during the afternoon of February 1st and passed near Scranton, Pennsylvania at 7 p.m. EST on February 1st before heading northeast into New York State. Preceding this low pressure system, a fairly strong high pressure system (around 1040 millibars) was able to leave a large pool of cold air in place at the surface across Northwest New Jersey that was difficult for the low pressure system to scour.

Winter Storm in SUSSEX, NEW JERSEY
From 01-FEB-08 07:00:00 to 01-FEB-08 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WARREN, NEW JERSEY
From 01-FEB-08 07:00:00 to 01-FEB-08 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in HUNTERDON, NEW JERSEY
From 01-FEB-08 07:00:00 to 01-FEB-08 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in MORRIS, NEW JERSEY
From 01-FEB-08 07:00:00 to 01-FEB-08 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper