As biting cold temperatures sweep across a large swath of the US, parts of the Great Lakes face up to two feet of additional lake-effect snow through Tuesday – the latest complication for cities already blanketed by snowfall amid post-Thanksgiving travel.

In late fall and winter, lake-effect snow is a common occurrence in the Great Lakes region. "Lake-effect snow occurs when cold air, often originating from Canada, moves across the open waters of the Great Lakes.