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 ...

Imagine the polar vortex as a giant, icy whirlpool far above the Earth, keeping frigid Arctic air contained near the north ...

It's going to get cold in Tennessee. Meteorologists predict freezing temperatures for much of the state. Here's the latest.

This blast of frozen temperatures is tied to a polar vortex... but what is that? Air spins around the notoriously cold North and South Poles. When the air is spinning fast, it's stable, but when it is ...

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

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

Some of the coldest air in years is expected to plunge into the High Plains, Midwest and finally the East in the coming days ...

The polar vortex is like a giant, swirling pool of super-cold air in the upper atmosphere over the North Pole. Imagine it like a children's spinning top. When the top is spinning fast and steady ...

The polar vortex is always around. It is a channel of strong winds high up in the atmosphere that circles the poles. One over ...

NEW ORLEANS -- The vast majority of Americans are about to get an extended taste of frigid Siberian weather. Another polar ...

A lobe of the Polar Vortex is going to swing through Ontario just north of Michigan. The upper-air forecast gives us an easy look at this strong winter player. The general meaning of the Polar ...

However, when the stratospheric polar vortex weakens and gets “kicked” off the pole, it reverberates ... numbing cold air to spill into Eastern North America at ALL levels of the atmosphere.