The arrival of an arctic air mass brought one of the coldest mornings of the month of January to most of New Jersey.  Morning low temperatures were mainly in the single numbers above zero. In addition, gusty northwest winds continued into the morning and lowest hourly wind chill factors reached around degrees below zero throughout the state.
Actual low temperatures included 2 degrees below zero in Walpack (Sussex County), 2 degrees above zero in Sussex (Sussex County), 3 degrees above zero in Hackettsown (Warren County), 4 degrees above zero in Morristown (Morris County), 6 degrees above zero in Flemington (Hunterdon County), Somerville (Somerset County) and Marlboro (Monmouth County), 7 degrees above zero in Trenton (Mercer County) and Berkeley Township (Ocean County), 8 degrees above zero in at the Atlantic City International Airport, Woodstown (Salem County), Swedesboro (Gloucester County) and New Brunswick (Middlesex County), 9 degrees above zero in Margate (Atlantic County), Millville (Cumberland County) and Lumberton (Burlington County), 10 degrees above zero in Cherry Hill (Camden County) and 12 degrees above zero in Wildwood (Cape May County).
Lowest hourly wind chill factors included 11 degrees below zero in Sussex (Sussex County), 9 degrees below zero in Atlantic City and Somerville (Somerset County), Mount Pocono (Monroe County) and 8 degrees below zero in Trenton (Mercer County).
As the arctic high pressure system entered the United States near Montana, its surface pressure was quite high: 1058 millibars at 4 a.m. EST on January 7th. At 7 a.m. EST on the 8th, it weakened to 1041 millibars and was located near Memphis, Tennessee. From there, the high pressure system moved east. This reduced the wind and also brought the region a relatively warmer return flow from the southwest on the night of the 8th.

Cold/Wind Chill in CAMDEN, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in EASTERN CAPE MAY, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in GLOUCESTER, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in WESTERN ATLANTIC, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in SALEM, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in EASTERN ATLANTIC, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in SUSSEX, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in CUMBERLAND, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in SOMERSET, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in MERCER, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in NORTHWESTERN BURLINGTON, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cold/Wind Chill in WESTERN OCEAN, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in WARREN, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in MORRIS, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in WESTERN MONMOUTH, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Cold/Wind Chill in EASTERN OCEAN, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in WESTERN CAPE MAY, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Cold/Wind Chill in HUNTERDON, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in SOUTHEASTERN BURLINGTON, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in MIDDLESEX, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in EASTERN MONMOUTH, NEW JERSEY
From 07-JAN-15 22:00:00 to 08-JAN-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet