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

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

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 ...

Anytime we get an Arctic air blast down this far south, this is an artifact of the polar vortex rearing its ugly head,” said ...

A winter storm sweeping through the U.S. South on Tuesday was dumping snow at levels millions of residents haven’t seen before. Moisture from the Gulf of Mexico was combining with a ...

BOSTON (AP) — Residents across the country from the Northern Plains to the tip of Maine are bracing for dangerously low ...

Carter Thweatt discusses City Year's Day of Service to help an elementary school in Little Rock. Thousands march in ...

A rare winter storm is expected to bring heavy snow, sleet and freezing rain to Florida, Texas and other parts of the South ...

As happened earlier this month, this latest cold snap comes from a disruption in the polar vortex, the ring of cold air ...

The coldest air of the season will sweep into the province this weekend, courtesy of a polar vortex. It has been a relatively mild winter so far, so this drop in temperature will surely feel like ...

These conditions are all thanks to a familiar sounding occurrence: the polar vortex, a large area of low pressure and cold air that surrounds the Earth's poles. The "vortex" is the ...

These conditions are all thanks to a familiar sounding occurrence: the polar vortex, a large area of low pressure and cold air that surrounds the Earth's poles. The "vortex" is the ...