Winter Storm Dion, the fourth named winter storm of the 2013-14 season, will result in more snowand ice for some of the same areas impacted by Winter Storm Cleon.
I-95 Corridor Radar
Northeast Forecast Sunday Night
Dion Ice Forecast
Northeast Forecast Monday
Northeast Snow Forecast
Dion initially produced snow in Washington,California, Nevada and the Four Corners states during the first half of the weekend.
Now, Dion is spreading snow and ice from theMidwest to the Mid-South, Ohio Valley, Middle Atlantic and Northeast.
Here's a look at the forecast through the beginning of the new work week.
Megalopolis: D.C. to Boston
Philadelphia and the suburbs of Washington, D.C. and Baltimore saw bands of moderate to locally heavy snow Sunday. This is being followed by a transition to sleet and freezing rain. That transition started in D.C. and Baltimore Sunday afternoon and will spread into Philadelphia Sunday night.
The snow and ice have led to hazardous travel conditions across the region, leading to numerous accidents and severe travel delays. The wintry mix will eventually changeover to rain in all three of these metropolitan areas before the Monday morning commute. However, enough ice may accumulate to cause falling tree limbs, power outages, and dangerous travel conditions during the overnight hours.
It was the season's first measurable snow for all three cities; as of 4 p.m. Sunday, the preliminary snowfall amounts were 3.2 inches in Philly, 0.7 inch in Baltimore at BWI-Thurgood Marshall Airport and 0.5 inch at Reagan National Airport in the nation's capital. The average date of the first measurable snow ranges from Dec. 14 in Baltimore to Dec. 18 in Philadelphia and Washington.
Snow officially arrived in New York City at 4:37 p.m. Sunday. It will change to a wintry mix of sleet and freezing rain and eventually to plain rain Sunday night. The changeover will occur before the morning commute Monday except in parts of the Hudson Valley, where icy conditions may await early commuters.
(MAP: Northeast Snow Forecast)
Boston and much of southern New England can expect some light snow late Sunday night before mixing with and changing to rain Monday. Only light snow accumulations are expected.
Interior Mid-Atlantic and Appalachians: Significant Ice Storm
Significant ice accumulation is possible to the lee (east side) of the Appalachians as cold air gets dammed up against the mountains.
The I-81 corridor from Virginia's Shenandoah Valley northward through Pennsylvania could see significant impacts. Icy conditions in northwest North Carolina should improve Sunday night as temperatures rise.
Travel will likely be dangerous and power outages are possible. Untreated sidewalks will be extremely slippery. This includes cities such as Roanoke, Va. and Hagerstown, Md.
Northern New England and Upstate New York: Wintry Mess
Light snow will spread north into much of Northern New England and Upstate New York Sunday night. For much of this region, the precipitation will change over to a wintry mix on Monday with rain taking over near the Atlantic coast, but snow should hold on over the Adirondacks and into the mountains of northern Vermont and New Hampshire as well as much of interior Maine.
Snowfall amounts are expected to be light in most areas, but with the changeover to sleet and freezing rain, icy roads will make for treacherous travel Sunday night in many areas. Much of central and western New York should rise above freezing, however, by Monday's morning commute, easing travel woes there.
Midwest Snow Forecast
Midwest: Large Area of Snow
The large area of light to moderate snow that blanketed most of the Midwest Sunday will shrink considerably Sunday night, but there will be additional light accumulations across much of Wisconsin and Michigan. This includes the Milwaukee area, where numerous freeway accidents snarled traffic Sunday.
By Monday, just lake-effect snow showers will remain over western and northern Michigan as cold air barrels in behind Winter Storm Dion.
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