The polar vortex is a “constant feature” that begins to develop sometime in September and persists through sometime in spring ...

There is a sudden warming about to happen high up in the atmosphere. This warming usually affects the Polar Vortex.

Winter weather lingers as a major shift in the weather pattern could have millions across the United States once again ...

During the winter, the polar vortex can strengthen and weaken - and even reverse direction - which has effects on the weather ...