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 ...

The layer above that is the stratosphere. For the purposes of this article, we're talking about the stratospheric polar ...

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 ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

With the next Arctic Outbreak looming close, we take a dive into what the Polar Vortex is and how it will affect our area: ...

Americans were bracing Thursday for frigid temperatures that forecasters said could produce life-threatening conditions, with ...

Polar vortex brings frigid air to US, making Trump's inauguration coldest in 40 years, moved indoors due to cold.

For the purposes of this article, we're talking about the stratospheric polar vortex. It's a semi-permanent area of low pressure that resides over the Arctic. Stable polar vortex: When the ...

However, when the stratospheric polar vortex weakens and gets “kicked” off the pole, it reverberates down to the tropospheric polar vortex and causes it to run amuck in the lower latitudes.