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 ...

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 weather spell is being referred to as a polar vortex, but Mahdavi said that's a bit of a misnomer for what's happening: the term "polar vortex" describes a massive cyclone of air that is ...

The bitter weather -- tied to an Arctic "polar vortex" blast -- is expected to bring nighttime lows as cold as minus 31 degrees Celsius over the weekend for some of the northernmost parts of the ...

Inauguration ceremonies take place on the West Front of the U.S. Capitol, which offers little to no protection ... RELATED: What is the polar vortex? How it’s responsible for dangerous cold ...

The coldest weather of the season to date will be due to a phenomenon called a polar vortex, an upper-level jet stream that typically circulates around both the North and South Poles, but can push ...