On the tail end of a Midwest blizzard, the most substantial lake-effect snow event of the season so far is under way.
While the air behind the storm is not severely cold, it will be cold enough to get the Great Lakes snow machine running full steam.
While the intensity of the snow will vary from location to location, by the minute, where bands of snow persist up to a couple of feet of snow is possible downwind of the lakes.
Strong winds during and following the flurries, squalls and bands of lake-effect snow will make for whiteout conditions and extensive blowing and drifting of fallen snow.
Snow and slippery travel conditions are currently threatening motorists across parts of Pennsylvania and New York State today.
I-90 through New York is being significantly impacted by the bands of heavy snow, high winds and poor visibility.
Other major highways likely to be severely impacted by lake-effect snow and wind include I-81 through New York into Sunday.
Snow showers will also persist over the northwest-facing slopes of the West Virginia and western Maryland mountains, as well as the Laurel Highlands and Allegheny Plateau in Pennsylvania.
This story was originally published on Monday, Dec. 17, 2012 and has been updated.
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