The latest computer model runs have trended closer to the coast for Wednesday's Nor'easter, which means a period of moderate to heavy snow for central Maryland.

Scattered rain showers are expected Tuesday evening from 5 p.m. to 10 p.m. The rain will likely change to wet snow from Baltimore north after 10 p.m. Periods of snow will continue Wednesday morning then taper off after 2 p.m., WBAL-TV 11 Weather Chief Meteorologist Tom Tasselmyer said.

Temperatures will be above freezing during the storm, the ground is not frozen and pavement temperatures are warm, so snow accumulation will most likely be on grassy areas, trees, decks and colder surfaces.

But it now looks like a wet snowfall of 2-4 inches is possible around Baltimore, 4-6 inches in the northern suburbs and 6 inches and more near the Pennsylvania line and points north.

The National Weather Service has issued a winter weather advisory for Carroll County, northern Baltimore County and Harford County, and a winter storm watch for Cecil County, late Tuesday night through Wednesday afternoon.

WBAL NewsRadio 1090 will have expanded coverage of Wednesday’s winter weather starting Wednesday morning at 4 a.m.

WEATHER FORECAST | RADAR | SCHOOL CLOSINGS AND DELAYS BGE OUTAGE MAP | LISTEN LIVE

With the timing of the potential snow is mostly during the daylight, and with temperatures above freezing, any accumulation would be mostly on colder surfaces rather than the roads.

The Maryland Department of Transportation State Highway Administration is tracking and planning for a storm that will develop and impact sections of Maryland, mostly northern counties, Tuesday night and Wednesday. Crews are pretreating with salt brine in northern tier counties.

Although pavement and air temperatures are above freezing, there could be sections that could freeze toward the Mason/Dixon line. Motorists are encouraged to pay close attention to conditions and travel with an abundance of caution, especially on elevated sections of highways -- bridges, ramps and overpasses. MDOT SHA emergency operators and maintenance staff will closely monitor roads and patrol for any icy patches as temperatures drop.

From the National Weather Service:

WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY AFTERNOON...

* WHAT...Significant accumulations of wet snow possible. There is the potential for 5 or more inches of snow.

* WHERE...Northern Baltimore and Northwest Harford Counties.

* WHEN...From late tonight through Wednesday afternoon.

* ADDITIONAL DETAILS...There is a possibility of difficult travel conditions, including during the morning commute on Wednesday. Significant reductions in visibility are possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Continue to monitor the latest forecasts.