A powerful winter storm is set to blast portions of the U.S. with accumulating snow, cold temperatures, strong winds and rain just as millions of people across the country prepare to travel early for Thanksgiving.

With millions of people preparing to travel for the Thanksgiving holiday, two strong storm systems, including the first major winter storm of the season, are forecast to bring snow, wind and rain across a large swath of the United States this week.

Before it's time to defrost the turkey, a frosty low-pressure system could stifle Thanksgiving travel plans in the region with freezing temperatures, strong winds -- and even snow.

Multiple winter storm warnings have been issued across five different states, with some advising people avoid travel. Different parts of Oregon, Washington, Idaho, Wyoming and Montana are under winter storm warnings with heavy snow expected across all these states.

With millions of people preparing to travel for the Thanksgiving holiday, two strong storm systems, including the first major winter storm of the season, are forecast to bring snow, wind and rain across a large swath of the United States this week.