WEDNESDAY - JANUARY 17 - 7:00 AM
At this hour the rain/snow line is located from New York City to Keansburg to Freehold and then down through the middle of Ocean County. It is progressing eastward and will move offshore by 9am. The precipitation shield appears sufficient enough to continue the snow until the late morning so up to one inch of slush is possible for coastal sections this morning. For areas away from the coast in central NJ, 1 to 2 inches is likely with 1 to 3 inches in interior northern NJ. Highest accumulations of 3 to 5 inches are possible in the northwest corner of the state where it has been snowing for several hours
TUESDAY - 6:30 PM
The guidance has trended warmer for much of the area. Will keep the "up to an inch" forecast going for coastal sections of central NJ but it will more likely be just a small coating on colder surfaces.
The forecast for the I-78 corridor looks a bit too high, a better forecast is 1 to 3 inches
TUESDAY - 11:00 AM
See below for start and end times, will be adding some more zones to better narrow down the snow accumulation forecast. These are totals when the snow ends Wednesday morning:
Coastal Monmouth/Ocean/Southern NJ: Up to 1 inch
Interior Monmouth: 1 to 2 inches
Route 1 corridor Philly to Trenton to New Brunswick to Newark including NYC: 1 to 3 inches
I-78 corridor west of GSP: 2 to 5 inches
I-80 corridor west of GSP: 3 to 6 inches
Northwest corner north of I-80 and west of I-287: 4 to 8 inches
TUESDAY, JANUARY 16TH - 9:00 AM
A cold front will approach the area today resulting in mostly cloudy skies. Some light snow will break out this afternoon across northernNJ but this should not cause any travel issues today.
This evening, before midnight, precipitation will develop over the entire area. Along the coast and in central and southern NJ, precipitation will initially be in the form of rain or non-accumulating wet snow. Further north above I-78 and away from the coast, the precipitation will be all snow.
As the night wears on, any rain or mixed precipitation will change over to all snow. Snow will continue through the late night and end around mid-morning tomorrow.
Snow accumulations of 1 to 2 inches are expected across coastal sections and most of central NJ. This includes the NYC metro area. In southern NJ, expect an inch or less.
In northern NJ above I-78 and west of the Parkway, there is the potential for 2 to 5 inches of snow with some 6 inch amounts possible in the extreme northwest corner of the state.