"An Arctic air mass is expected to plunge into the Central U.S. this week, with high confidence for widespread, ...

Cold air originating from the Arctic Ocean was dislodged earlier this week and spilled south across the United States. As a ...

Another arctic blast has sent temperatures plummeting across the United States, bringing “life-threatening” wind chills and ...

Extreme cold warnings were issued as a polar vortex hits the US after deadly floods and storms caused chaos across several ...

A cold weather advisory is in effect until noon Tuesday, with wind chills ranging between minus 15 and minus 25 before ...

The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a normal pattern that is stronger in the winter and keeps some of the coldest ...

When the polar vortex is strong and circular, it acts as a barrier between the cold air over the pole and warmer air to the south and can speed up the westerly flow of the jet stream, helping it ...

Low temperatures and gusty winds could make for nights which feel as though they are in the single digits in New York City.

The coldest burst of Arctic air this season is coming to put an icy exclamation point on America's winter of repeated polar ...

The biggest batch of record-setting cold temperatures are likely to hit early Thursday and Friday, Orrison said. But North ...

More than 95 million people are facing gripping cold Tuesday as a polar vortex sends temperatures plunging to record levels, ...

Different weather forces in the Arctic are combining to push the chilly air that usually stays near the North Pole ... polar vortex has sudden warming, weakens and all the cold air escapes south ...