Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States ...

"Potentially hundreds of thousands of people may go without electricity and heat for days, one meteorologist said ...

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

A storm riding the edge of incoming polar air could bring the D.C. region a meaningful snowfall Sunday, but the exact track ...

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

Temperatures could fall below -20 F across certain parts of North Dakota and Minnesota.

WASHINGTON — Warm Arctic waters and cold continental land are combining to stretch the dreaded polar vortex in a way that will send much of the United States a devastating ...

Grab your coats, it's getting chilly. A polar vortex broke, and severe temperatures are set to dominate most of the United States, including the Midwest, in the coming days. The polar vortex will ...

The big freeze resulting from an Arctic weather phenomenon known as the polar vortex has affected 187 million Americans — more than half the country's population. It was loosening its grip Wednesday, ...

About 230 million people will face temperatures of 20 degrees or colder and about 150 million likely will be hit by snow and ...