On the northern edge of a storm system bringing heavy rain to the Southeast, moisture will meet up with cold air parked over the Northeast to produce a brief round of accumulating snow on Wednesday.
The snow will arrive from south to north early Wednesday morning, first overspreading areas from eastern West Virginia to western Virginia, northern Maryland, central and southern Pennsylvania, northern Delaware and southern New Jersey.
It will expand northward through the day into northern Pennsylvania, northern New Jersey, New York state and New England.
The National Weather Service has issued Winter Storm Warnings for the Northern Tier of Pennsylvania and the Southern Tier of New York, where localized areas of heavy snow are expected to make travel very dangerous, especially over the higher elevations.
Winter Weather Advisories are also in effect for portions of western Maryland, central and northeastern Pennsylvania, northwestern New Jersey, central and southeastern New York, northwestern Connecticut, western Massachusetts and southern New Hampshire. The snow could cause some slick roads in these areas as well.
Temperatures will be near or above freezing during the snowfall, which will limit accumulations for most areas, particularly on roads and sidewalks.
Less than an inch of snow is expected for Philadelphia and New York City, while 1 to 3 inches could fall in Boston and many other parts of the Northeast. Most of the accumulation will be on the grass or elevated surfaces, with pavements mostly remaining wet.
As much as 2 to 4 inches might pile up in the higher terrain of the Poconos in northeastern Pennsylvania and the Catskills in south-central New York. Localized amounts up to 5 inches are not ruled out above 1,200 feet in elevation.
The snow will come to end across the Northeast on Wednesday evening.