Sub-zero wind chills are expected as far south as Oklahoma and the Tennessee Valley ... this latest cold snap comes from a disruption in the polar vortex, the ring of cold air usually trapped ...

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

The polar vortex can be a powerful source of winter weather, but it's not the only cause of severe cold and snow in regions better known for warmth and sunshine. The Gulf Coast states are still ...

But is Wisconsin in a polar vortex? And what is a polar vortex anyways? Here's what to know. What is a polar vortex? A polar vortex is a low pressure area where air swirls counterclockwise keeping ...

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 ...

NEW YORK (PIX11) – Arctic air has brought chilling temperatures as low as 12 degrees to New York City — but are we in a polar vortex? A polar vortex settled over New York City and New Jersey following ...