More than 18 million people are under winter weather alerts across the West and Midwest as storms are forecast to bring heavy ...

A polar vortex broke, and severe temperatures are set to dominate most of the United States, including the Midwest, in the ...

Another winter storm is expected to bring more snow to the Midwest, further affecting holiday travel that was already disrupted by weather in the region. The storm is then forecast to head for the ...

Snow, high winds and below-average temperatures are sweeping from the Rockies to the Midwest, while an atmospheric river threatens flooding in the Pacific Northwest.

Such events distort the polar vortex, which causes Arctic air to descend into the U.S. and causes temperatures to plummet.

Coast-to-coast storm systems could disrupt Thanksgiving travel plans for millions of Americans this week, forecasters say.

For those traveling for the Thanksgiving holiday, a series of winter weather alerts could have big impacts on road trip plans ...

The trip home from Thanksgiving for millions of travelers in the central U.S. will be disrupted by a "significant winter ...

Central Indiana braces for wintry weather as clipper systems bring light snow and mixed precipitation next week. Stay ...

The polar vortex is a large upper-level, low-pressure area or circulation that typically resides above the Arctic Circle.

Heavy snow is expected to continue on Sunday across the Midwest and Upper Great Lakes. This could delay flights and strand ...