Quick Facts
- Type
- Weather Hazard
- Definition
- An atmospheric wave pattern formed when stable air flows over mountainous ter...
- Used By
- Pilots
Definition#
A mountain wave (or lee wave) is an atmospheric gravity wave that forms on the downwind (lee) side of a mountain when stable air is forced over terrain. Waves can propagate to high altitudes and produce severe turbulence.
Why It Matters Operationally#
Mountain waves can cause altitude deviations of thousands of feet, even in clear air. Rotor turbulence near the surface beneath wave crests is extremely hazardous. Lenticular clouds are a visual indicator.
Related Guides#
- Clear Air Turbulence Explained
- What Is Turbulence?
- Aviation Weather Explained — The Complete Operational Guide