The Arctic Oscillation is expected to be in a negative phase next week, which would allow cold air from the North Pole to spill southward.

Another Arctic blast has been forecast to bring frigid air to a large section of the United States later in January.

Friday succeeded in being the warmest day of the week, by several degrees. However, the warmer temperatures are moving out of New Mexico as arctic air moves in. A low pressure system will dive ...

As arctic air blows through South Texas, the city of Corpus Christi continues to offer a series of warming centers — places where the public can find respite from the cold during the day — and ...

After a mild Saturday, residents in North Texas will wake up to the coldest air of the season starting Sunday, with wind chills dipping into the teens and single digits.

Understanding the polar vortex Even as Arctic air is polar - coming from the north pole - the polar vortex lives in the stratosphere, about 10 to 30 miles above the Earth's surface.

The stretch between Sunday night and Tuesday will have the most dangerous road conditions, according to the National Weather Service.

Arctic air pumped from the north will plunge temperatures across parts of the U.S., with more snow and dangerous conditions forecast.

It’s a sign of the depth of the cold air about to spread across much of the rest of America’s heartland. Wind Chill Warnings and Watches already stretch across much of the Upper Midwest… ...

Meteorologists say the big cold front being pushed from the Arctic is still a ways out, but two cold fronts before it are arriving soon.