Low pressure tracked through the Great Lakes on January 18. Warm advection driven precipitation overspread the mid-Atlantic throughout the day ahead of a warm front. The antecedent air mass was colder than average, allowing precipitation to fall as a mix of snow, sleet, and freezing rain for a considerable time over parts of the region, despite the area of low pressure tracking so far west and gradually drawing warmer air into the region. Precipitation eventually changed over to mainly rain.

Winter Weather in WARREN, NEW JERSEY
From 18-JAN-20 11:00:00 to 18-JAN-20 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Light snow occurred. A report of 2.8 inches of snow was received from near Hope.

Winter Weather in CAMDEN, NEW JERSEY
From 18-JAN-20 15:45:00 to 18-JAN-20 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A light mix of snow and freezing rain occurred. Snowfall amounts were less than one inch. Numerous surrounding observations suggest that at least trace amounts of freezing rain also fell.

Winter Weather in CUMBERLAND, NEW JERSEY
From 18-JAN-20 15:45:00 to 18-JAN-20 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Light freezing rain occurred. A trace of freezing rain was recorded by the KMIV ASOS.

Winter Weather in SALEM, NEW JERSEY
From 18-JAN-20 15:45:00 to 18-JAN-20 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Light freezing rain occurred. While no direct measurements were received, numerous reports from New Castle, Gloucester, and Cumberland Counties confirm this.

Winter Weather in HUNTERDON, NEW JERSEY
From 18-JAN-20 11:00:00 to 18-JAN-20 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Light snow occurred. A report of 3.1 inches of snow was received from near Stanton.

Winter Weather in MERCER, NEW JERSEY
From 18-JAN-20 11:00:00 to 18-JAN-20 20:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A light mix of snow and freezing rain occurred. Near Ewing, reports were received of up to 1.2 inches of snow and 0.09 inches of ice accretion.

Winter Weather in MORRIS, NEW JERSEY
From 18-JAN-20 12:00:00 to 18-JAN-20 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow occurred, with numerous reports of 2 to 3 inches of snow.

Winter Weather in SOMERSET, NEW JERSEY
From 18-JAN-20 11:30:00 to 18-JAN-20 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A light mix of snow and freezing rain occurred. Snowfall amounts ranged from 1 to 3 inches. Ice accretion of up to 0.08 inches was measured in Somerville.

Winter Weather in SUSSEX, NEW JERSEY
From 18-JAN-20 12:00:00 to 18-JAN-20 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A light snowfall of around 2 to 3 inches occurred. Trace amounts of icing also occurred in some areas including at the KFWN ASOS site.

Winter Weather in GLOUCESTER, NEW JERSEY
From 18-JAN-20 15:45:00 to 18-JAN-20 18:45:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A light mix of snow and freezing rain occurred. Snowfall amounts were less than one inch, with trace amounts of icing.

Winter Weather in NORTHWESTERN BURLINGTON, NEW JERSEY
From 18-JAN-20 15:45:00 to 18-JAN-20 19:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A light mix of snow and freezing rain occurred. In Florence, a trained spotter reported 1.1 inches of snow and 0.10 inches of ice accretion.

Winter Weather in MIDDLESEX, NEW JERSEY
From 18-JAN-20 12:00:00 to 18-JAN-20 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A light mix of snow and freezing rain occurred. In Metuchen, a report was received of 1.7 inches of snow and 0.10 inches of ice accretion.