frigid air pushes southward toward the U.S. What's the difference between an Arctic air mass and the polar vortex? Arctic air masses originate over the Arctic or Antarctic regions and are very cold.

The coldest weather of the season to date will be due to a phenomenon called a polar vortex, an upper-level jet stream that typically circulates around the North Pole and South Pole, but can push ...

Life-threatening' cold temperatures generated by a polar vortex will be fueling ... like temperatures plunging well below zero. Antarctica 'super vortex' is speeding up due to climate change ...

the term "polar vortex" describes a massive cyclone of air that is always swirling high in the atmosphere above the North and South Pole. Cold spells like the one in the forecast this weekend can ...

(WPDE) — The polar vortex is always around. It is a channel of strong winds high up in the atmosphere that circles the poles, one over the North Pole and one over the South Pole. When the vortex is at ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...

It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...