A strong cold front and upper-level low was rapidly approaching Arizona. Ahead of this weather disturbance these spectacular lenticular clouds developed over the Kachina Peaks during the night of 03/06/2012. As the sun rose in the morning the clouds were nicely illuminated. About an hour after sunrise atmospheric conditions began to change and the wave clouds became more diffuse and detached from the peaks and drifted downstream.

Here is a video clip showing the wave clouds. The original clip is 40m40s long. The clip shown here has been sped up by a factor of 200x so the time lapse now occurs in around 12 seconds.