A rare glimpse into the wintry conditions of the Mars north polar vortex has shown that temperatures inside the vortex are ...

Summer may end on a cooler note for parts of the U.S., with meteorologists suggesting that a weakened polar vortex could ...

The polar vortex is stirring up, bringing the earliest hints that the seasons are changing. When will Wisconsin see its first freeze?

The polar vortex is stirring up, bringing the earliest hints that the seasons are changing. What does that mean for Vermont?

Bismarck, N.D., fell to -39°F, six degrees from its all-time coldest day. The cause of the week-long deep freeze? A polar vortex collapse. Now, meteorologists are calling for another collapse in the ...

From the polar vortex to sweltering summer heat, our team of forecasters gave every major city a weather-themed personality.