New Delhi, Dec. 5 -- A fast-moving winter storm sweeping across the eastern United States on Friday has triggered slippery travel, and widespread school schedule changes from Virginia to Maryland. AccuWeather meteorologists say the system tapped into just enough cold air to generate a band of snow and ice stretching from Oklahoma and Missouri to the mid-Atlantic.

Snow is most likely across the mountains of Kentucky, Tennessee, North Carolina and Virginia, with lighter bands extending toward Washington, D.C. Forecasters warn of brief, slick conditions in Philadelphia.

Pockets of 2-4 inches of snow were reported in parts of Virginia, including Roanoke, Harrisonburg and Richmond. Even minimal accumulation and a thin glaze of ice have cause...