Don’t pack away the winter coat just yet. A polar vortex split could bring one last stretch of cold to the D.C. region before the end of March.

Don’t pack away the winter coat just yet. A polar vortex split could bring one last stretch of cold to the Philadelphia region before the end of March.

A split in the Polar Vortex is becoming more likely toward the end of March. Currently, a stronger, consolidated vortex is ...

A rapidly intensifying storm system over the northern High Plains will move eastward toward the Great Lakes Thursday night, ...

The Great Lakes and Northeast are bracing for another cold shot later this month — down to single digits in places. How cold will it get in NY?

A polar vortex split high in the stratosphere is expected to send frigid Arctic air toward Michigan and the Great Lakes. The event could bring colder-than-normal temperatures and late frosts to the ...

High above Earth, powerful jet streams act like invisible barriers that keep the freezing polar vortex trapped near the Arctic. When this barrier weakens or shifts, massive waves of Arctic air can ...