The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a ...

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point ...

An Arctic blast tied in part to the polar vortex is driving record frigid air south from the Northern Plains toward the Gulf ...

But at times some of the vortex can break off or move south, bringing unusually cold weather south and permitting warmer ...

The coldest burst of Arctic air this season is coming to put an icy exclamation point on America’s winter of repeated polar vortex ... with record snow in New Orleans and drought and destructive ...