It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it?

The National Weather Service said that wind chill temperatures could dip into the teens to low-20s from Texas across the Gulf Coast.

Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit that is expected to provoke teeth-chattering but not be record-shattering.

Forecasts suggest that peak solar activity will make aurora borealis displays even more intense than usual in 2025. Here are ...

Air temperatures in December 2024 were above average over the entire Arctic Ocean, continuing the pattern set in ...