The polar vortex is a mass of cold air swirling high above the Arctic. Scientists closely monitor atmospheric shifts that could disrupt it and influence weather patterns on the surface. Forecasts ...

As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of ...

Polar Vortex collapse set to send temperatures plunging in the US and Canada - The weather event could unleash extreme winter ...