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.

Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex is a large area of cold, spinning air that sits near the North Pole and exists year-round. When it weakens or ...

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 ...

As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of Earth’s poles 10 to 30 miles above the surface. The term vortex is used to ...

The polar vortex is sending arctic blasts and chilly temperatures to most of the United States, and states from Texas to Oklahoma could see snow, sleet and ice. As of Wednesday, Jan. 21, millions of ...

In yet another sign that winter weather is either here or will be soon, the dreaded polar vortex is making news yet again. Its potential arrival in the United States over the next few weeks is cause ...

As another winter storm hits Western North Carolina and other regions, here's what to know about deciphering forecaster terms.

Frigid wind chills of -50 degrees and lower hit parts of the Midwest early this week – with some seeing high temperatures below 0 – all thanks to the polar vortex. But, what the heck is the polar ...

Central Texas witnessed one of its worst flood events on record during a busy holiday weekend. The combination of heavy rainfall and the hilly terrain led to the extreme rise in rivers and a Flash ...