|Some classic wave clouds, or lenticulars, from the front that went through a couple days ago.|
Lenticulars—which are sometimes described as unique, or even rare—are fairly common in Nevada, in the lee of the Sierra Nevada and the many mountain ranges of the Basin and Range.
Understanding lenticular clouds and mountains waves
Lenticular cloud with irisation (cloud iridescence) at Atmospheric Optics
Lenticular clouds at APOD
Photo taken 23Oct2012, Sparks, NV, from the Sheels parking lot.