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

In the wake of the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the polar ...

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

The bitter cold at Niagara Falls is part of a polar vortex onslaught of frigid air that's plagued the central and eastern U.S ...

Mississippi to possibly see brutally cold temperatures as polar vortex shifts south bringing Arctic air with it.

A bitter blast of cold air settles over the D.C. region Tuesday as all eyes turn to a potential weekend winter storm that ...

A storm riding the edge of incoming polar air could bring the D.C. region a meaningful snowfall Sunday, but the exact track will determine whether the region sees a decent storm or misses out entirely ...

A major snow storm is hitting the Northeast this weekend, but what can you expect near you? See the latest NOAA forecast, ...

An unusually brutal winter storm is set to pummel more than 160 million Americans from Friday, as a stretched "polar vortex" ...

Add Yahoo as a preferred source to see more of our stories on Google. The displacement of the polar vortex over the eastern half of the U.s. will usher in days of arctic cold through the end of ...

Punxsutawney Phil emerged from his tree stump on Monday and saw his shadow, signaling six more weeks of winter.