A vigorous upper air disturbance coupled with a low pressure system that was intensifying east of the New Jersey coast produced heavy snow across the northern third of New Jersey and a wintry mix of sleet and snow across the rest of the state. Precipitation started again as snow across the northern third of the state during the early evening of the 20th. Farther to the south, where the air mass was warmer, precipitation started as rain. During the evening precipitation changed to sleet and then snow. It took until about midnight for the changeover to occur across extreme southeast New Jersey. The heaviest precipitation, thus the largest accumulation of sleet and snow, occurred across the northwest half of the state. Accumulations ranged from less than one inch in Cape May County to 10 inches in Morris County. The snow ended shortly after daybreak on the 21st.Because this event occurred on a Saturday night (the 20th) and a Sunday morning (the 21st), the number of traffic accidents was relatively lower. But, 46 people on a Greyhound Bus traveling from New York City to Atlantic City were injured around 2 a.m. EST on the 21st. The bus was traveling on the Garden State Parkway in Ocean County, when it slid, spun out and overturned after striking a guardrail. Most of the injuries were minor, but four persons required hospitalization, one with a broken hip. The driver was cited for careless driving. The only snow related fatality occurred in Hamilton Township in Mercer County when a 40-year-old male slid across a road in his pickup truck, struck a curb and then rammed his vehicle head on into a tree. Several vehicles slid into ditches in Mercer County.Specific accumulations included 10 inches in Jefferson Township (Morris County), 9 inches in Hoptacong (Sussex County) and Oak Ridge (Morris County), 8.5 inches in Stewartsville (Warren County), 8 inches in Branchville and Stockholm (Sussex County) and Belvidere (Warren County), 7 inches in Long Valley (Morris County), Andover (Sussex County), Hackettstown (Warren County) and Yardville (Mercer County), 6 inches Manalapan (Monmouth County), 5.5 inches in White House (Hunterdon County) and Hightstown (Mercer County), 5.3 inches in New Brunswick (Middlesex County), 5 inches in Morristown (Morris County), Belle Mead (Somerset County), Princeton (Mercer County) and Freehold (Monmouth County), 4 inches in Moorestown and Tabernacle (Burlington County), Pennsauken (Camden County), Metuchen (Middlesex County), Pottersville (Somerset County), and West Deptford (Gloucester County), 3 inches in Cherry Hill (Camden County), 2 inches in Seabrook (Cumberland County) and 1.1 inches in Estell Manor (Atlantic County).

Winter Storm in WESTERN MONMOUTH, NEW JERSEY
From 20-JAN-01 20:00:00 to 21-JAN-01 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in BURLINGTON, NEW JERSEY
From 20-JAN-01 20:00:00 to 21-JAN-01 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in CAMDEN, NEW JERSEY
From 20-JAN-01 20:00:00 to 21-JAN-01 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in CUMBERLAND, NEW JERSEY
From 20-JAN-01 23:00:00 to 21-JAN-01 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in HUNTERDON, NEW JERSEY
From 20-JAN-01 18:00:00 to 21-JAN-01 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in MERCER, NEW JERSEY
From 20-JAN-01 18:00:00 to 21-JAN-01 09:30:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in MORRIS, NEW JERSEY
From 20-JAN-01 19:00:00 to 21-JAN-01 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in SUSSEX, NEW JERSEY
From 20-JAN-01 19:00:00 to 21-JAN-01 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in WARREN, NEW JERSEY
From 20-JAN-01 19:00:00 to 21-JAN-01 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in EASTERN ATLANTIC, NEW JERSEY
From 20-JAN-01 23:00:00 to 21-JAN-01 05:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in EASTERN CAPE MAY, NEW JERSEY
From 20-JAN-01 23:30:00 to 21-JAN-01 05:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in EASTERN MONMOUTH, NEW JERSEY
From 20-JAN-01 22:00:00 to 21-JAN-01 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in EASTERN OCEAN, NEW JERSEY
From 20-JAN-01 23:00:00 to 21-JAN-01 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in GLOUCESTER, NEW JERSEY
From 20-JAN-01 20:00:00 to 21-JAN-01 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in MIDDLESEX, NEW JERSEY
From 20-JAN-01 20:00:00 to 21-JAN-01 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in SALEM, NEW JERSEY
From 20-JAN-01 20:00:00 to 21-JAN-01 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in SOMERSET, NEW JERSEY
From 20-JAN-01 19:00:00 to 21-JAN-01 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in WESTERN ATLANTIC, NEW JERSEY
From 20-JAN-01 22:00:00 to 21-JAN-01 05:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in WESTERN CAPE MAY, NEW JERSEY
From 20-JAN-01 22:00:00 to 21-JAN-01 05:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Sleet in WESTERN OCEAN, NEW JERSEY
From 20-JAN-01 22:00:00 to 21-JAN-01 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC