foehn wave"Mountain waves, lee waves, or trapped lee waves in the air stream flowing over the mountain barrier that occur in association with foehn conditions. The Moazagotl is one example of a foehn wave made visible by lee-wave clouds.
In meteorology, Lee waves, also known as mountain waves, are waves in a stream of air when the wind moves over mountains. They always occur in groups on the lee side of mountains.
35 Wind: Mountain Waves. Rotor Winds 36 Wind: Mt. Washington, New Hempshire. 6,288ft. 37 Wind: Mt. Washington. Wind speed in April 1934, 239 MPH 38 Wind: Noreasters. Causes much shore damage. 39 Wind: One minute average. 40 Wind: Onshore. Offshore.
horizontal scales ranging from a few to several hundred kilometers, including thunderstorms, squall lines, fronts, precipitation bands in tropical and extratropical cyclones, and topographically generated weather systems such as mountain waves and ...
In extreme situations, the strong vertical accelerations in thunderstorms and mountain waves can be 1% of gravity. hypsithermal period The period about 4000 to 8000 years ago when the Earth was apparently several degrees warmer than it is now.
 See also: Air, Mountain wave, Cloud, Weather, Horizon
  
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