Every state but Hawaii, California and Florida is likely to get a taste of wind chills of 20 degrees or colder.

After a winter storm this weekend, the polar vortex will return, bringing subzero temperatures to around 80 million people ...

As the polar vortex stretches its icy grip, America braces for a winter like no other. Discover the forces behind this ...

The polar dance that caused snow to fall across the South in January has been studied for decades, but scientists still hope to answer many remaining questions. Miles above the Earth, two bands of ...

The coldest burst of Arctic air this season is coming to put an icy exclamation point on America's winter of repeated polar vortex invasions, meteorologists warn. And it will stay frozen there all ...

This winter, however, the Polar Vortex has been very strong and nicely circular. Nevertheless, very cold air has managed to find its way southward into our region already last month and again this ...

Think of the polar vortex as a giant ... It’s a permanent feature of our atmosphere, kept in place by strong winds high above us called the jet stream. This jet stream acts like a fence ...

How do the polar vortex and the jet stream affect our weather? When the polar vortex is strong and circular, it acts as a barrier between the cold air over the pole and warmer air to the south and can ...