You've likely heard the term "polar vortex" virtually every winter since it first entered into popular culture during a bitterly cold January a decade ago. The polar vortex is a whirling cone of low ...

Add Yahoo as a preferred source to see more of our stories on Google. Record cold temperatures are once again expected to hit a swath of the country this weekend—even plunging Florida into its coldest ...

After last month’s polar vortex collapse, a second one is expected to unleash freezing conditions across North America. With the winter weather phenomenon predictions eyeing a mid-March comeback, ...

WASHINGTON (AP) — Warm Arctic waters and cold continental land are combining to stretch the dreaded polar vortex in a way that will send much of the United States a devastating dose of winter weather ...