What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

As a winter storm approaches Western North Carolina and other regions, here's what to know about deciphering forecaster terms.

After this weekend's snow storm moves out, cold Arctic air will move in.

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

As another winter storm hits South Carolina and other regions, here's what to know about deciphering forecaster terms.

A winter storm descending on the US is expected to deliver heavy snow and ice to more than 150 million people across roughly ...

The meteorologists said the polar vortex system is set up due north of Michigan over Canada's Hudson Bay. It's at least ...

Sudden stratospheric warming is expected to keep a weakened vortex splintered, plunging the region back to record-breaking ...

A snowstorm and harsh winter weather have impacted at least 177 million people across the US ...

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and ...