A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by treacherous conditions.

A powerful arctic cold front arrived in Colorado on Friday and will keep the state very cold until Wednesday. The 9NEWS Weather Impact Team has issued 9NEWS Weather Impact Days for Sunday, Monday ...

Most of the US will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send temperatures tumbling below freezing for most of the nation starting this ...

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it and how does it impact our weather? The polar vortex is ...

Most of the country will likely be hit by an arctic blast this weekend into early next week as the polar vortex ushers in cold air from Siberia and multiple storms roll in and bring the potential ...

Editor's Note for Sat. Jan. 18: A polar vortex is set to impact much of the US. Click here for the latest update. A polar vortex is forecasted to blanket most of the continental United States in ...

The blast of cold that fueled record snowfall across Gulf Coast beaches last week was just the latest to transport frigid air that normally swirls above the North Pole to places much farther south ...

One of the key players in these dramatic shifts is something called the polar vortex. The polar vortex is a massive area of cold air located high in the atmosphere, typically spinning over the ...

It looks like it could get even colder heading into next week. Within the last decade, the phrase 'polar vortex' has become popularized in the weather world. In fact, you may have heard it getting ...

A lobe of the polar vortex, a stormy ring that typically keeps the coldest air locked up near the North Pole, will dip southward into the United States this weekend into next week. Polar air ...

The lowest readings ever recorded in Canada and around the northern hemisphere occurred when this Arctic feature crumpled like a leaky dam. That frigid feature is the polar vortex, a critical piece of ...