Michigan and the Great Lakes are bracing for another cold shot later month as a polar vortex split in the stratosphere nudges ...

The polar vortex that has locked much of the country into a deep freeze is finally loosening its grip, and the atmosphere is already lining up a very different pattern. Forecasts point to a sharp but ...

The polar vortex is a large area of cold, spinning air that sits near the North Pole and exists year-round. When it weakens or shifts, Arctic air can spill south, increasing the risk of snow and ...