NJ Weather: New Snow Estimates As Winter Weather Timeline Shifts

NEW JERSEY – Winter weather was expected to hit much of New Jersey on Monday evening and Tuesday, causing slick roads and possible school closings or delays on Tuesday. A winter weather advisory is in effect in nine counties and a winter storm warning is in effect in Sussex and Warren counties.

The weather could be still significant enough to close schools, delay openings or cause early dismissals. Read more: New Jersey School Closings/Delays List/Early Dismissals For Tuesday

Up to 4 inches of accumulation are possible, according to forecasters. Read more: New Jersey Snow Totals, Town-By-Town - For Monday And Tuesday

Much of the snow and wintry mix is supposed to fall during the evening and early Tuesday.

The winter weather advisory is in effect for Essex, Union, Bergen, Passaic, Middlesex, Hunterdon, Somerset, Morris and Mercer counties. It's set to expire between 1 and 6 p.m. Tuesday.

Here were the alerted areas on Monday evening:

Here is what you should expect:

• Snow and ice amounts will be highly dependent on the timing of precipitation type changes.
• Areas in the advisory are expected to have very slippery conditions due to ice/sleet coming on top of snow.
• The greatest impacts are anticipated to be north and west of I-95, with a potentially prolonged icing event for northwestern New Jersey.
• The Monday evening and Tuesday commutes may be affected. Bridges and overpasses will be especially slippery.
• Gusts up to 25 mph are possible Tuesday, which could lead to minor tree damage in areas where ice has accumulated on the trees.
• In areas under a winter storm warning, snowfall tonight will become freezing rain towards daybreak Tuesday and freezing rain will continue through Tuesday. Additional snow accumulations of 2 to 4 inches and ice accumulations of up to one quarter-of-an-inch were expected.
• In those areas, snow this evening will mix with sleet and freezing rain late, then will change to predominantly freezing rain early Tuesday morning. Freezing rain continues through the day Tuesday and may briefly change to snow before ending Tuesday evening.

The National Weather Service said ice and wind could be a problem on Monday evening and Tuesday:

Certain areas could experience more trouble with ice than others:

Here is how much snow is expected:

Here is the high-end prediction:

There are two systems at work, according to AccuWeather.

This first round of snow and ice will dissipate late Monday and Monday night in lieu of a new system taking shape behind it to the west, according to AccuWeather.

This system will then continue to strengthen as it moves toward the mid-Atlantic and Northeast Monday night and Tuesday, according to AccuWeather.

Accumulating snow will blossom into northern portions of the Ohio Valley late Monday into Monday night, according to AccuWeather. Travelers along Interstate 70 from Illinois to Ohio will have several inches of snow and reduced visibility to contend with Monday into Monday night.

The threat for wintry precipitation will come to an end later Monday in over much of the Mid-Atlantic as milder air arrives and changes the precipitation to plain rain, according to AccuWeather.

Here is the forecast:

• Monday: Rain/snow possible, mainly after 1 p.m. Cloudy, with a high near 36. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 60 percent. Little or no snow accumulation expected.
• Monday night: Rain, snow, and freezing rain before 3 a.m., then rain, snow, and sleet between 3 a.m. and 4 a.m., then rain after 4am. Low around 33. Northeast wind 5 to 9 mph. Chance of precipitation is 100 percent. Little or no ice accumulation expected. Little or no snow and sleet accumulation expected.
• Tuesday: Rain, mainly before 4 p.m. High near 39. Northeast wind around 9 mph. Chance of precipitation is 100 percent. New precipitation amounts between a half and three quarters of an inch possible.
• Tuesday night: A chance of rain and snow showers before midnight, then a chance of snow showers between midnight and 1 a.m. Cloudy during the early evening, then gradual clearing, with a low around 27. Northwest wind 8 to 10 mph. Chance of precipitation is 30 percent. Little or no snow accumulation expected.
• Wednesday: Mostly sunny, with a high near 38. West wind 7 to 15 mph, with gusts as high as 36 mph.