The jet stream is the river of air that moves weather from west to east on a roller coaster-like path. Usually, the plunges ...

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.

The United States is facing a series of extreme weather events, including record heat in the Southwest, heavy snowfall in the Great Lakes, and an Arctic chill from the polar vortex.

The United States faces an array of extreme weather events, including a polar vortex, heat dome, and significant snowfall, impacting various regions simultaneously.

As we approach the end of March, many people may be getting ready for shorts season, but a split in the Polar Vortex could bring a cooler end to the month for locations across the Northern Tier.

Don’t pack away the winter coat just yet. A polar vortex split could bring one last stretch of cold to the D.C. region before the end of March.

Don’t pack away the winter coat just yet. A polar vortex split could bring one last stretch of cold to the Philadelphia region before the end of March.

Meteorologists say the United States is getting hit by almost every kind of extreme weather at once, as spring air masses collide and the jet stream twists.

Meteorologists are reaching for superlatives to describe an oncoming heat wave so intense and rare for this time of year that it could leave some locations shattering their all-time temperature ...