Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around the poles, making winter weather more chaotic.

Ranked dead last, or perhaps not mentioned at all, would probably be the only state that sits partly within the Arctic Circle: Alaska. But 2025 is off to an interesting start as far as the weather is concerned.

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

With last week's freeze being the second time temperatures dipped below freezing this winter, many are wondering if this active winter pattern is setting the stage for an even colder February.

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into next week, impacting millions of Americans in nearly all of the contiguous states.

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation ... the ceremony will be held inside the United States Capitol Rotunda. These temperatures are undoubtedly ...

A series of disturbances in the atmosphere is sending the polar vortex south (again) next week with a burst of even colder Arctic air than last week.

Americans were bracing Thursday for frigid temperatures that forecasters said could produce life-threatening conditions, with Donald Trump's inauguration expected to be the coldest in 40 years.

These conditions are all thanks to a familiar sounding occurrence: the polar vortex, a large area of low pressure and cold air that surrounds the Earth's poles. The "vortex" is the ...

WASHINGTON – A blast of Arctic air is set to cover much of the United States with temperatures ... date will be due to a phenomenon called a polar vortex, an upper-level jet stream that ...

Polar Vortex Set to Envelop Much of US in Freezing Temperatures By Hannah Lang and Brendan O'Brien (Reuters) - A blast of Arctic air is set to cover much of the United States with temperatures ...