Meteorologist Rob Shackelford: Well, yes, there are actually patterns in our weather. So, there's this thing called the jet stream. It's in the upper atmosphere and it dictates a lot of our weather.

Arctic air originates near the polar regions and is among the coldest air masses on Earth. It typically stays locked in ...

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 across the eastern U.S.

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.

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