mountain wave


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mountain wave

[′mau̇nt·ən ‚wāv]
(meteorology)
An undulating flow of wind on the downwind, or lee, side of a mountain ridge caused by wind blowing strongly over the ridge.

mountain wave

mountain waveclick for a larger image
A well-developed mountain wave.
A standing wave or a lee wave on the downwind side of a mountain. Also called a lee wave or a standing wave.
References in periodicals archive ?
Analysis of model output at 1-min temporal resolution revealed the development of a mountain wave and downslope flow, followed by the appearance of a rotor beginning at 0923 UTC.
During the piteraqs, the mountain wave becomes so steep that it breaks, like a big wave of water that collapses and crashes onto the shore.
After analyzing the D03 output of WRF, we concluded that the severe icing of the C-212-200 aircraft was caused by mountain waves. The aircraft first crossed the second (southernmost) mountain wave, experiencing light to moderate icing since the updraft there was less intense, and there was less LWC.
10, cyclonic flow associated with a low pressure system produces easterly winds at the surface over southern Greenland, generating a vertically propagating large-amplitude mountain wave, and a subsequent breakdown at the critical level at which there is a reversal of the background with height, from easterly to westerly.
Pilots need to be aware that mountain wave turbulence produces the most violent type of turbulence outside of thunderstorms.
The FAA's FAASTeam, quoting the Colorado Pilot's Association--who should know--offers these tips for dealing with mountain waves:
In winter and early spring with strong westerly winds, mountain waves are an issue at 8000 and sometimes even 10,000 ft.
None of the weather information obtained specifically mentioned the possibility of mountain wave activity over the mountainous terrain.
The crash was ultimately linked to rudder design defects, but the final NTSB report contained many pages describing the high winds and mountain wave conditions that day, requiring the large control inputs needed to manage the flight path.
The model supported light-to-moderate clear air turbulence from 6400 feet msl through 8000 feet, and mountain wave development from 10,000 to 12,000 feet msl.

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