TULSA, Okla. — On Saturday, Tulsa held their annual Polar Plunge to help raise money for Special Olympics Oklahoma.

A strong, stable vortex is like a skater spinning with their arms tucked closely in, holding in an area of cold air over the Arctic. But when there’s a wobble in the rotation, winds in the vortex can ...

SEPTA train goes up in flames in Delaware County; roughly 350 passengers evacuated RIDLEY PARK, Pa. (WPVI) -- A SEPTA train ...

Around 140 million people across more than two dozen states may experience temperatures greater than 70 degrees. Here are the ...

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

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

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 ...

A rare frigid storm is charging through Texas and the northern Gulf Coast, blanketing New Orleans and Houston with snow, closing highways and grounding nearly all flights. School was canceled ...

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 ...

Residents across the country from the Northern Plains to the tip of Maine are bracing for dangerously low temperatures as tens of millions of residents along the East Coast contend ...

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 and sends temperatures tumbling to levels not ...

This Arctic blast is thanks to a polar vortex. "We live on this big blue marble called Earth and at the top and the bottom you have spinning air — a vortex — and that air at the top and bottom ...