The polar vortex, a high-altitude ring of westerly winds that usually keeps Arctic air locked near the pole, is showing signs of unusual weakening. If that circulation falters or collapses, the result ...

During certain winter cold snaps, weather stations in the American Midwest and Northeast have recorded temperatures colder ...

Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex explains why extreme cold still grips parts of the U.S. despite warmer winters overall. (CREDIT: Shutterstock) ...

El Niño's record-breaking force could enter a chaotic dance with another wintertime powerhouse: The polar vortex.

A weakening of the polar vortex could lead to a prolonged period of intense cold for parts of the United States during the first half of January. Several waves of arctic air could keep temperatures ...

Stephen has degrees in science (Physics major) and arts (English Literature and the History and Philosophy of Science), as well as a Graduate Diploma in Science Communication. Stephen has degrees in ...