Eight states gave winter weather warnings, with heavy snow, strong winds, and unsafe travel conditions forecast until Thanksgiving. Follow Newsweek's live blog.

Waves of storm systems are expected to move through the East Coast this week, threatening to disrupt some Thanksgiving travel on Tuesday and bringing rain and potentially snow on Thanksgiving Day. Out West, another storm may take aim at California on Monday and Tuesday.

A winter storm has moved into Colorado's mountains, bringing widespread snow, with 1 to 3 feet of accumulation possible by Wednesday afternoon. Rain will transition to snow overnight tonight for the Denver metro,

Heavy overnight snow in Colorado’s mountains created hazardous travel conditions that will continue through Thursday, according to the National Weather Service. Slick, slushy roads are also on their way to Denver after the snowstorm spread into the metro area overnight,

A major snowstorm was causing issues for drivers in the high country on Tuesday.

Winter is tightening its icy grip across much of the country, with a string of states slapped with weather warnings this week amid fears of treacherous conditions. Reduced visibility and heavy snow—up to 6 feet of snow accumulation in some parts—are forecast just days away from Thanksgiving.

The snowstorm bearing down on Colorado has already produced a winter storm warning and avalanche warning for much of the mountains.