Mountain Waves & Airplane Turbulence

Lenticular cloud formation (like photo above) are photo gems that we love to view. However, if you are in an airplane you probably want to avoid. These clouds can be found quite often in the mountain areas of Western US. They usually form when we have strong westerly winds aloft.

The danger is in Rotor clouds often form in the vicinity of lenticular formations and mountain wave activity. These small cumulus-like clouds form below the mountain ridge and are indicative of high velocity rotary air circulation beneath the wave crests.

There is also danger for pilots when there are dry conditions and no cloud formation. In these situations pilots will need to get extensive pilot briefings from meteorologists to make sure conditions are stable.

If planes go near these clouds they can expect dramatic changes in airspeed, altitude, and pitch attitude may be experienced. Personal injury to passengers and crew could result from penetrating such airspace.

For more information on mountain waves and airplane turbulence.