Researchers studying the movement of crowds at a traditional Spanish festival have shown that densely packed groups of people form swirling ‘vortex’ patterns never before documented in human ...

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the polar regions—here’s how it works ...

Am I going to be buried in snow? As its name implies, the circumpolar vortex is a counterclockwise-spinning (northern hemisphere) swirl of super-cold air in the upper atmosphere that sits atop the ...

A lobe of the polar vortex will arrive in the United States this weekend, bringing the lowest temperatures in years and snow and ice to the East and Deep South.

Threat level: Pieces of the polar vortex are projected to swirl southward out of northern ... multiple significant winter storms. The weather pattern features a strong high pressure area over ...