A storm that was pounding California's Sierra Nevada with snow Tuesday took aim at the Colorado Rockies and could roll east and slam the Appalachians on Thanksgiving Day, bringing unsettled travel weather to millions of Americans hitting the skies and roads for the holiday weekend.

CBS New York meteorologist John Elliott said "very intense snow" will hit communities along the Great Lakes, Plans and Midwest regions as upwards of 6 feet of snow is forecast.

Millions of people across the central and eastern U.S. could see snow or rain through the Thanksgiving holiday weekend, forecasters said.

The Great Lakes region saw new snow Monday and faced the prospect of even more this week after U.S. travelers battled harsh weather to get home after Thanksgiving, forecasters said. Snow showers fell in western Michigan overnight,

An Arctic blast brought snow, frost and dangerously cold winds to the northern Plains, Midwest and Great Lakes, creating difficult travel conditions on one of the busiest travel days of the year, as millions of Americans head home from their Thanksgiving destinations.

Winter weather could snarl travel plans for the millions of Americans traveling for the Thanksgiving holiday this year.

Parts of the Great Lakes region were pummeled with almost 3 feet (90 centimeters) of snow, threatening what’s expected to be one of the busiest US travel weekends on record as Americans return home from Thanksgiving holiday gatherings.

Lake-effect snow blanketed swaths of the U.S. as Thanksgiving travelers journeyed home this holiday weekend, with more snow expected to fall over the Great Lakes region through the week. While