Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

and it's what's happened here – it can lead to cold snaps on the ground, but not always. It's still early days in terms of ...

Frigid temperatures are keeping snow on the ground in parts of the South as some cities in the North report dangerously low temperatures. CBS News Pittsburgh's Erika Stanish reports, and Skyler Henry ...

The system, known as a polar vortex, is forecast to bring subzero temperatures to the Midwest, Mid-Atlantic and deep into the South. And it looks as if we may get more arctic blasts in the coming ...

Americans have been warned to brace for more winter storms as Arctic winds are set to dump more ice and snow amid freezing temperatures.

This vortex has always existed and is not something new. What's happening now is that the jet stream — the usually west-to-east river of airway above ground that moves weather systems along ...

That led to Cincinnati dealing with its longest stretch of 6 inches or more of snow on the ground in 15 years. Up next: another visit from the polar vortex. An Arctic air mass plunges into the ...