Meteorologist say the jet stream is barreling down near-vertical, scream-inducing drops, followed by straight-up ascents.

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season, followed by some of the coldest temperatures seen in years. The storm began out ...

Winter Tightens Its Grip as Polar Vortex Reappears ...

New Yorkers should prepare for one last noticeable chill from the polar vortex before spring takes hold, with below-average temperatures expected March 24-30.

As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of Earth’s poles 10 to 30 miles above the surface. The term vortex is used to ...

Ohio and the Great Lakes are bracing for another cold shot later this month — down to single digits in places. When to expect ...

Add Yahoo as a preferred source to see more of our stories on Google. Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season, followed ...

A major winter storm is impacting much of the nation east of the Rocky Mountains. The storm's intensity is caused by a combination of a stretched polar vortex, a wavy jet stream, and moisture from the ...