A low pressure system from the Gulf of Mexico brought a winter storm of snow, sleet and freezing rain to northwest New Jersey and a lighter mix of wintry precipitation throughout most of the rest of New Jersey. In northwestern New Jersey, snowfall accumulations averaged 1 to 2 inches, but ice accretions reached around half an inch, especially in Sussex County. Elsewhere in New Jersey, snowfall accumulations were generally less than one inch and ice accretions were less than one quarter of an inch. In the southern half of New Jersey, precipitation began as snow around midnight EST on the 6th. It changed quickly to sleet and freezing rain. Along the immediate coast, precipitation started as and fell as rain throughout the event. As warmer air moved in, precipitation changed to plain rain inland between 4 a.m. and 8 a.m. EST. In the northern half of the state, precipitation started as snow after midnight EST on the 6th. It changed to sleet and freezing rain between 5 a.m. and 8 a.m. EST. The warmer air had a harder time moving northwest and the transition to plain rain which began in Mercer and Monmouth Counties around 8 a.m. EST took until the afternoon in northwest New Jersey and until around 6 p.m. EST in all of Sussex County. Untreated roadways and walkways were very treacherous. Precipitation changed to plain rain around daybreak on the 6th. The low pressure system responsible for the wintry weather developed in the western Gulf of Mexico on the 5th. It moved northeast reaching the Tennessee Valley on the evening of the 5th and into the Great Lakes on the morning of the 6th. Its associated warm front moved north from the Carolinas on the morning of the 6th into the lower Delmarva Peninsula during the afternoon of the 6th before stalling. The occluded front associated with the primary low pressure system (It went northeast from the Great Lakes through the Saint Lawrence River Valley.) moved through the region during the night of the 6th. The initial cold air near the surface was provided by a high pressure system from Eastern Canada. It moved offshore overnight on the 5th and during the day on the 6th as the southeast flow around it brought in warmer air from the Atlantic Ocean into the region. But, it took most of the day for the warmer air near the ground to reach northwest New Jersey.

Winter Storm in SUSSEX, NEW JERSEY
From 06-FEB-04 02:00:00 to 06-FEB-04 18:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Storm in WARREN, NEW JERSEY
From 06-FEB-04 02:00:00 to 06-FEB-04 13:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Storm in MORRIS, NEW JERSEY
From 06-FEB-04 02:00:00 to 06-FEB-04 13:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Weather in CAMDEN, NEW JERSEY
From 06-FEB-04 01:00:00 to 06-FEB-04 07:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in CUMBERLAND, NEW JERSEY
From 05-FEB-04 23:00:00 to 06-FEB-04 05:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in MIDDLESEX, NEW JERSEY
From 06-FEB-04 02:00:00 to 06-FEB-04 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in NORTHWESTERN BURLINGTON, NEW JERSEY
From 06-FEB-04 01:00:00 to 06-FEB-04 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in SALEM, NEW JERSEY
From 05-FEB-04 23:00:00 to 06-FEB-04 06:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in SOMERSET, NEW JERSEY
From 06-FEB-04 02:00:00 to 06-FEB-04 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in SOUTHEASTERN BURLINGTON, NEW JERSEY
From 06-FEB-04 01:00:00 to 06-FEB-04 05:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in WESTERN ATLANTIC, NEW JERSEY
From 06-FEB-04 00:00:00 to 06-FEB-04 04:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in WESTERN MONMOUTH, NEW JERSEY
From 06-FEB-04 01:00:00 to 06-FEB-04 08:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in WESTERN OCEAN, NEW JERSEY
From 06-FEB-04 01:00:00 to 06-FEB-04 07:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in EASTERN MONMOUTH, NEW JERSEY
From 06-FEB-04 02:00:00 to 06-FEB-04 06:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in GLOUCESTER, NEW JERSEY
From 06-FEB-04 00:30:00 to 06-FEB-04 06:30:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in HUNTERDON, NEW JERSEY
From 06-FEB-04 02:00:00 to 06-FEB-04 10:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Weather in MERCER, NEW JERSEY
From 06-FEB-04 02:00:00 to 06-FEB-04 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC