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

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

The majority of the United States will experience chilling temperatures due to a blast of arctic air from Canada. The Midwest ...

A severe winter storm that brought freezing rain, sleet and snow to a large part of the U.S. was intensified by the polar ...

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

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

This winter, the Northern Hemisphere has been suffering from extreme cold. In South Korea, an unusually prolonged cold wave ...

Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

What is the polar vortex? Mississippi weekend weather forecast calls for winter storm with lows in the teens, paired with ...

Strong winds, frigid temperatures, and snowfall moved across several states during the course of the last few days, and for ...

The term ‘polar vortex’ is nothing new, but it has gained a lot of popularity over the last few years – especially with the ...