New Jersey will be hit with a messy mix of snow, sleet and rain Saturday with some parts of the state getting hit with up to five inches of accumulation, the National Weather Service said.

The northern part of the state will get the most snow, while most of South Jersey and the Jersey Shore will see a mix of light snow or sleet transitioning to rain, according to the weather service’s 5 a.m. briefing.

When will the snow start and end?

Snow will begin in mid to late morning for most of the state north of Somerville, the National Weather Service said.

“Snow may mix with sleet or rain during the late afternoon and evening (especially south of I-78) before tapering off late this evening,” according to the weather service’s briefing.

For the Instate 95 corridor and South Jersey, the snow could begin in late morning, but quickly change over to rain this afternoon or this evening.

“Light snow accumulations are possible initially, but warming surface temperatures are expected to preclude more significant impacts,” the briefing said.

National Weather Service

National Weather Service

What time will the first flakes start falling?

Forecasters said the snow could begin roughly at 10 a.m. in Vineland; 11 a.m. in Atlantic City and Warren County; and 12 p.m. in Toms River, New Brunswick, Morristown and Sussex County.

How much snow will we get?

The top of the state around West Milford in Passaic County could get up to 5 inches of snow and Paramus in Bergen County could get 4 inches, the forecast said.

The rest of the northern part of the state, including Essex, Morris, Sussex and Warren counties, could get up to 3 inches of snow, the forecast said.

Two inches are expected in Trenton, Freehold and New Brunswick. Most of South Jersey is predicted to get less than an inch.

National Weather Service

National Weather Service

Are any warnings or advisories in effect?

The National Weather Service has issued a winter weather advisory for 12 of the state’s 21 counties: Bergen, Essex, Hudson, Hunterdon, Mercer, Middlesex, Morris, Passaic, Somerset, Sussex, Union and Warren.

The advisory goes into effect at 10 a.m. Saturday and runs through 10 p.m. Saturday in each of those counties, except for Bergen, Essex, Hudson, Passaic and Union. In those five counties, the advisory runs until 1 a.m. Sunday.

NJ snow - sleet - rain forecast maps Jan 18

Here's how the winter storm forecast is shaping up as far as the general timing and what types of precipitation will likely be falling on Saturday and Sunday.Len Melisurgo and National Weather Service

Live weather radar

NJ Advance Media staff writer Len Melisurgo contributed to this report. Kelly Heyboer may be reached at kheyboer@njadvancemedia.com. Follow her on Twitter @KellyHeyboer. Find her at KellyHeyboerReporter on Facebook.

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