Post-Thanksgiving travel will be treacherous in parts of the Great Lakes region on Sunday due to heavy lake-effect snow, while biting cold temperatures sweep across a large swath of the United States.

Weather conditions have been very favorable for heavy lake effect snow on Lakes Erie and Ontario over the last few days.It looks like we'

Lake-effect snowfall - buffeted from the Great Lakes to the Upper Peninsula and western Michigan, northeastern Ohio, northwestern Pennsylvania and portions of Upstate New York - is expected to continue into Monday, when the location of the heaviest snow bands are forecast to shift slightly southward.