The stratospheric polar vortex is entering its seasonal collapse. But that doesn’t mean calm weather is coming. What's expected for April weather?

Forecasters say that the polar vortex will usher in waves of frigid air across parts of the U.S. through January. The “more active polar vortex will drive colder air and snow across the central and ...

A fresh blast of Arctic air is poised to spill across a wide swath of the United States, and the latest polar vortex map makes clear which regions are most exposed. Forecast models show a sharp ...

The majority of the United States will experience chilling temperatures due to a blast of arctic air from Canada. The Midwest, Mid-Atlantic and Southern U.S. are expected to see below-freezing ...

This is read by an automated voice. Please report any issues or inconsistencies here. Nearly every U.S. region faces extreme weather: scorching Southwest heat, Arctic cold in the East and Midwest, ...

Michigan and the Great Lakes are bracing for another cold shot later this month — down to single digits in places — as a polar vortex split in the stratosphere nudges frigid Arctic air southward.