Clear Air Turbulence

Clear Air Turbulence (CAT) is a type of turbulence that occurs in clear skies, without any visible weather phenomena like clouds or storms. It usually happens at high altitudes, typically above 20,000 feet, and is caused by sudden changes in wind speed or direction in the jet stream, near mountain ranges, or in areas where different air masses meet.

CAT is particularly dangerous because it is difficult to detect with radar, making it hard for pilots to anticipate and avoid. Passengers and crew can experience sudden jolts and drops in altitude, which can lead to injuries if seat belts are not fastened.