Clime
← Back to Blog
Guides

Understanding Clear-Air Turbulence: What Passengers Need to Know

June 22, 2026 · The Clime Team
Understanding Clear-Air Turbulence: What Passengers Need to Know

Clear-air turbulence (CAT) is a phenomenon that can cause sudden, unexpected jolts during a flight, even when the sky appears clear and calm. Unlike turbulence associated with thunderstorms or weather fronts, CAT occurs in cloudless skies and is often invisible to both pilots and weather radar systems. (cbsnews.com)

What Causes Clear-Air Turbulence?

CAT typically arises when bodies of air moving at different speeds meet, creating wind shear—a rapid change in wind speed and direction over a short distance. This is most commonly found near jet streams, which are narrow, fast-moving air currents high in the atmosphere. The interaction between the jet stream and surrounding air masses can lead to turbulent conditions. (cbsnews.com)

Where Does Clear-Air Turbulence Occur?

While CAT can occur at various altitudes, it is most prevalent at cruising levels, typically between 23,000 and 39,000 feet above sea level. This altitude range coincides with the presence of jet streams, making it a common area for CAT encounters. (cbsnews.com)

How Is Clear-Air Turbulence Detected?

One of the challenges with CAT is its invisibility. Traditional weather radar systems detect precipitation and cloud formations but are ineffective in identifying clear-air turbulence. As a result, pilots often rely on reports from other aircraft, known as pilot reports (PIREPs), to anticipate and navigate around areas of CAT. (faraim.org)

Effects on Aircraft and Passengers

While CAT is generally not severe enough to cause structural damage to aircraft, it can lead to sudden and unexpected jolts that may cause discomfort or minor injuries to passengers and crew. It's important to note that such incidents are rare, and modern aircraft are designed to withstand these conditions. (britannica.com)

Staying Informed and Prepared

For passengers, staying informed about potential turbulence can enhance comfort and safety. Utilizing flight tracking apps or services that provide real-time updates on flight conditions can be beneficial. Additionally, keeping seat belts fastened when seated, even when the seat belt sign is off, is a prudent practice to ensure safety during unexpected turbulence.

Understanding clear-air turbulence and its characteristics can help passengers feel more prepared and at ease during their flights. By staying informed and following safety guidelines, travelers can navigate the skies with greater confidence.

Highlights:

Frequently Asked Questions