The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast. Here's the forecast.

Much below normal temperatures should persist across the eastern U.S. into early February before moderating slightly.

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

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 ...

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

"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 ...

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

A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

Michigan is experiencing frigid temperatures and heavy snow due to a dip in the jet stream, not the polar vortex. The polar vortex is a large-scale cyclone of cold air that typically stays far north ...

The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast. Here's the forecast.