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

It will be a cold Thanksgiving for millions across the Midwest as arctic air from Canada invades the Northern Tier on Wednesday before spreading to the Eastern U.S. in time for Black Friday shopping, ...

A significant change in the atmosphere means the weeks after Thanksgiving could be colder and snowier than normal across ...

More than 84 million are under winter weather bulletins with several states expected to see lows 10 to 25 degrees below normal.

A harsh drop in temperatures is being delivered to the eastern two thirds of the U.S. thanks to a polar vortex dipping down from the Arctic.

The polar vortex is weakening, which means New England is in for a colder than usual December, with episodic cold snaps.

Heat-related deaths typically get headlines, but a new study raises concerns about the number and characteristis of people ...