The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the majority of U.S. The vortex is ...

This blast of cold weather is due to activity of the polar vortex.

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the ...

Back when “climate change” took over—when the atmospheric concentration of carbon dioxide was well below 400 parts per ...

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...

A recent study explains how warmer temperatures at the top of the planet destabilize the jet stream and allow colder air to ...

People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, ...

Abnormal weather events and severe winter storms could be caused by a disrupted polar vortex. Find out here how the polar ...

Louisiana isn’t known for extreme cold weather—but that changed Tuesday, when the National Weather Service issued its first ...

A polar vortex is going to bring very cold air to much of southern Ontario, including Waterloo region, Guelph and Wellington ...

A mass of cold air from the Arctic – known as a polar vortex - is what’s chilling Quebec, including Montreal, until Wednesday ...