After this weekend's snow storm moves out, cold Arctic air will move in.

A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

The polar jet stream, which is affected by the polar vortex above it, has become quite wavy, allowing Arctic air to ...

Alabama braces for another polar vortex blast bringing well below freezing temperatures. How cold will temperatures get? Here's what to know.

Aircraft wake vortex dynamics encompass the study of the vortical patterns generated by an aircraft during flight, which have significant implications for aviation safety and airport capacity. These ...