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

After this weekend's snow storm moves out, cold Arctic air will move in.

Add Yahoo as a preferred source to see more of our stories on Google. In an early sign of the winter weather that's coming, the dreaded polar vortex is making news yet again. The polar vortex is ...

In the winter months, bitterly cold outbreaks of Arctic air across the Midwest and the Northeast can be tied to what is known as the "polar vortex." The polar vortex refers to the cold air and low ...

A late-season polar vortex could extend America's winter-like temperatures into early spring, according to AccuWeather. So far in December, temperatures across the nation have trended above average.