Parts of New York, Michigan, Ohio and Pennsylvania have been walloped by a major winter storm that dropped feet of lake-effect snow over the weekend. CBS News national weather correspondent Rob Marciano has more on the show and CBS News senior transportation correspondent Kris Van Cleave has a look at how it's complicating post-Thanksgiving travel plans.

Post-Thanksgiving travel will be treacherous in parts of the Great Lakes region on Monday with more lake-effect snow falling after the region was already buried under feet of it, while cold temperatures remain across a large swath of the United States.

A lake-effect storm continued to blanket parts of the Great Lakes region with snow on Saturday, closing highways on one of the biggest travel weekends of the year and prompting Gov. Kathy Hochul of New York to declare a state of emergency on Friday in 11 counties.