The biggest swings in the jet stream are associated with the most energy. Under the right conditions, that energy can bounce ...

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

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

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

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

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

Washington will be hit with over a foot of snow. The metro area has four million people. Climate change is a trigger. The ...

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 ...

A vast pool of Arctic air is again spilling south, the kind of outbreak that can turn highways into morguish car lots and ...

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 ...

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