Winter Storm Boreas has now spread its mess of snow, wind, and rain to the East just in time for peak Thanksgiving travel.
According to winter weather expert Tom Niziol, Boreas' grip of snow and ice will have affected roughly 58 million people over an area of at least 2.5 million square miles by the time it departs Thanksgiving morning.
The storm already has affected much of the southwestern U.S. and parts of the Southern Plains, causing hundreds of rollover accidents and prompting officials to cancel events and close roads.
Just in time for peak Thanksgiving travel, Boreas is now laying down snow in parts of the interior Northeast and the Appalachians. Below is a regional breakdown of what to expect.
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Snow showers will continue to diminish Wednesday evening over the southern Appalachians.
Total snowfall accumulations will finish at generally 6 inches or less in the southern Appalachians. One exception was Beech Mountain, N.C., reporting 7 inches of snow. A dusting of snow is possible as far south as the north Georgia mountains (see map above at right).
Now, the forecast impact of Boreas in the Northeast.
Additional Rain and Snow
Additional Rain and Snow
As the low pressure system associated with Boreas moves northeast into the Canadian Maritimes, Wednesday night will bring an end to the precipitation for many areas. The last of the rain along the I-95 corridor should exit northern Maine shortly after midnight.
Lingering snow showers will wrap around behind the low pressure system into northern New England through the night and into Thanksgiving Day. Any accumulations will be minor.
(MORE: Thanksgiving Forecast)
Cold north to northwest winds blowing off the Great Lakes will also continue to manufacture bands of heavy lake-effect snow in snowbelt locations such as southwest Lower Michigan and northwest Indiana, the U.P. of Michigan and northern Wisconsin, northeast Ohio and northwest Pennsylvania, and central New York.
This activity should diminish by Thanksgiving morning over Upper Michigan, while the Lake Michigan activity reorganizes into multiple lighter snow bands over the western two tiers of counties in Lower Michigan.
Snow bands off Lake Erie will wind down Thanksgiving Day as winds become southwesterly. By Thursday night the snow showers off Lake Ontario in Upstate New York will start to wind down as well.
As the surface low intensifies over New England and eastern Canada, winds will intensify Wednesday night into Thanksgiving morning in the Northeast. Temperatures will plummet into the teens or low 20s across most of the interior Northeast by daybreak Thanksgiving. Untreated pavement, where the wind doesn't dry it out first, will become icy and very treacherous for motorists and pedestrians due to refreeze of melted snow or moisture from earlier rainfall.
(SNOW, WIND ALERTS: Northeast)
MORE: Winter Storm Boreas in Pictures
Traffic on I-35 at the 33rd street bridge in Edmond Sunday, Nov. 24, 2013. (Doug Hoke/The Oklahoman)