Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

Despite being notorious for bringing brutal cold and dangerous wind chills, the polar vortex has a surprising upside.

A Virginia Commonwealth University (VCU) expert says climate change is intensifying winter storms ahead of this weekend’s ...

A snowstorm and harsh winter weather have impacted at least 177 million people across the US ...

The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is ...

Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

About 230 million people will face temperatures of 20 degrees or colder and about 150 million likely will be hit by snow and ...

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

Warm Arctic waters and cold continental land are combining to stretch the dreaded polar vortex in a way that will send much ...

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...