This difference drives a large low-pressure circulation, known as the polar vortex, that extends from the Earth's surface high into the atmosphere. When the vortex is strong, the enhanced jet stream ...

A rare glimpse into the wintry conditions of the Mars north polar vortex has shown that temperatures inside the vortex are far colder than outside, and that the permanent darkness that winter brings ...

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 beginning to stir, signaling the first signs of seasonal change. Here's when to expect the first frost in ...

According to climate scientists, record levels of Arctic ice in 2025 could increase cold spells in the United States and Europe.

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

Stratospheric warming high above Antarctica could cause the Southern Hemisphere’s polar vortex to weaken at an unusually fast pace over the coming weeks.

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 ...

(CNN) — It’s really, really cold again — as the US shivers through at least the eighth blast of air from the Arctic this winter. Winter, which is warming faster than any other season for much of the ...

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

The polar vortex can't be felt in the United States or anywhere on Earth. Brutally cold temperatures are heading to the Midwest and Northeast this week -- but don't mistake this for a polar vortex ...

A rare glimpse into the wintry conditions of Mars’s north polar vortex has shown that temperatures inside the vortex are far colder than outside, and ...