Bone-chilling Arctic air gripped much of the eastern United States on Saturday, while lake-effect snow threatened to disrupt post-holiday travel in parts of the Great Lakes region. A frigid air mass that swept south across the northern Plains and Midwest ...

The National Weather Service warned that severe winter conditions—triggered by an Arctic blast—could persist over the weekend into Monday.

Biting cold conditions will sweep across a large swath of the United States Sunday while heavy, record-breaking lake-effect snow makes post-holiday travel “treacherous” and nearly “impossible” in parts of the Great Lakes region.