A winter storm that brought snow, sleet and freezing rain to a large swath of the Midwest swept into the mid-Atlantic and Northeast on Thursday, causing treacherous travel conditions, prompting school delays and closures and potential power outages for millions of Americans.

Places to the south of the Great Lakes will see the highest risk of disruptive ice from late on Wednesday into Thursday On the northern side of the storm, the precipitation will mainly be falling as snow but the most dangerous conditions are expected through portions of western Maryland,

A winter storm that brought traffic to a standstill in the Midwest on Wednesday morning is now setting its sights on major cities in the Great Lakes region Wednesday night before heading into the Northeast on Thursday,