The polar vortex is making a return to the forecast, but the counterintuitive weather feature is nothing to fear.

A cold winter is in store for those in the northern U.S., with milder temperatures across the southern tier, according to ...

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary between Arctic and more temperate air – dips deeply southward, bringing the ...

The polar vortex is a broad, fast ribbon of cold air that encapsulates the Arctic high in the stratosphere. Stable, it confines cold air near the North Pole. Unstable, it is rocked and stretched out ...

The polar vortex is whipping up the first hints at the cooler fall months, and soon, winter in NJ. Here's what to know.

The polar vortex is stirring up, bringing the earliest hints that the seasons are changing. When will Wisconsin see its first freeze?

Should this La Niña remain weak through 2025, the climate pattern’s influence on Oklahoma's winter weather. Here's what to ...