The formation of mountain lee waves. The presence of the mountain disturbs the air flow and produces a train of downstream waves. Directly over the mountain, a distinct cloud type known as lenticular cloud is frequently produced. Downstream and aloft, cloud bands may mark the parts of the wave train in which air has been uplifted (and thus cooled to saturation)
Single lenticular cloud over Laguna Verde, Bolivia. This cloud was probably formed by a vertically propagating mountain wave
1Durran, D.R. (2003). Lee waves and mountain waves.
https://atmos.uw.edu/academics/classes/2010Q1/536/2003AP_lee_waves.pdf
2Marshall, J., Plumb, R.A. (2008). Atmosphere, ocean, and climate dynamics: an introductory text. Elsevier Academic Press.
3Copyright of single lenticular cloud over Laguna Verde, Bolivia is Bernhard Muhr,
www.wolkenatlas.de