The polar vortex is splitting — an exceedingly rare phenomenon for this time of year that will be an unusual driver of warmer temperatures, as the calendar flips to March and meteorological spring.

With roughly 22,000 to 31,000 polar bears spread across 19 subpopulations, the latest data reveal a striking divide: while ...

DC swings from a warm 50 weekend to a cold start to the week, with highs in the 30s and a wintry mix as the polar vortex and ...

A rare and disruptive atmospheric event may soon unfold, raising the prospect of significant weather shifts across the U.S.

The cold weather appears to be here to stay in South Jersey, at least until mid-February. A polar vortex is expected to keep ...

The next step upward to spring weather is showing in the extended forecast. This week and much of next week look and feel ...

A polar vortex collapse is expected over the next two weeks, causing extreme winter weather and travel disruption across North America. The weather phenomenon is expected to develop in mid-March, ...

Add Yahoo as a preferred source to see more of our stories on Google. Bundle up, Bloomington, a winter storm is headed our way; do you know how to decipher winter weather forecasts? While just about ...

With over 170 million Americans facing below average temperatures, even colder air may be on the horizon thanks to the displacement of the polar vortex that will lock in a deep winter feel and park ...

For the past three decades, glaciologist Helen Amanda Fricker has been investigating polar regions — the fastest changing ...