Data from a polar vortex splitting during 2002’s Southern Hemisphere sudden warming event helps expand models to accommodate ...

10th polar vortex of the season hits the U.S. Here’s what to know With record snow in New Orleans last month and drought and destructive wildfires in Southern California, this winter has not ...

A shift in the polar vortex could bring a blast of Arctic air to millions of Americans in the second half of March, forecasters have warned. The polar vortex usually keeps cold Arctic air confined ...

It is not, however, the second coming of a polar vortex, a phrase the National Weather Service's Chicago office tweeted earlier this week to describe the upcoming sweater weather. They quickly ...

Another polar vortex disruption will stretch Arctic air across the top of the globe, with expected frigid conditions in the nation's capital severe enough to force Donald Trump's second ...