The storm tracking into the West will bring rain and mountain snow to that region and then possible blizzard conditions to the Northern Plains. High winds will be widespread and could kick up blowing dust and contribute to a high fire danger in the Southwest and Plains.

A potent winter storm is expected to barrel across the nation this week, unleashing a dangerous mix of extreme weather threats, including ferocious winds, blinding blizzards and critically elevated fire risks.

Over the next week, tens of millions of Americans will be at risk of severe weather as a colossal storm marches across the country, threatening hurricane-force winds, major flooding, blizzard conditions and a possible tornado outbreak.