Potential weekend snow in eastern US to follow 1st of 3 polar vortex episodes

A new winter storm is brewing for the upcoming weekend, but the extent of the snow, ice and rain will depend on how it interacts with a blast of Arctic air. The impending chill, tied with a shift in the polar vortex, is due to arrive from Wednesday to Thursday in the central and northeastern United States, AccuWeather meteorologists say. The cold air and potential winter storm follow a broad zone of accumulating snow from Monday to Tuesday in...