AccuWeather forecasts severe weather to shift eastward, with the Mississippi and Tennessee valleys at higher risk for storms.

A polar vortex collapse could bring extreme cold and travel disruptions to North America and Europe in mid-March. Follow Newsweek's live blog.

See, for example, the below-zero wind chills Dallas endured Wednesday morning, or when New Orleans was buried under a record-breaking 8 inches of snow in January. The polar vortex has been ...

A polar vortex collapse is poised to unleash severe winter weather across the US, Canada, and potentially the UK, causing ...