(AP) — The plunging polar vortex brought subfreezing temperatures Tuesday to some of the southernmost points of the U.S., ...

It's similar to the polar vortex pattern from the winter that turned ... with the biggest drops seen close to the Great Lakes, though people in Oklahoma and Arkansas will need to break out pants ...

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

The cause of the week-long deep freeze? A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge the U.S., Canada, and parts of ...

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 ...