Clouds of the Day - Saturday, October 31, 2020

How about this for a sky? No, this is not Colorado or another mountainous state where lenticularis clouds are common. The altocumulus lenticularis shown below are usually not found in the sky over Iowa but they do occasionally make a visit. Lenticularis clouds are lens shaped, which form as large waves ripple through the atmosphere. There is also an example of a Kelvin-Helmholtz waves. It was quite a day for sky watching.

Altocumulus lenticularis

Altocumulus stratiformis

Altocumulus lenticularis

Altocumulus lenticularis

Altocumulus lenticularis and altocumulus stratiformis

Kelvin-Helmholtz waves moving through altocumulus clouds.

Altocumulus stratiformis undulatus

Altocumulus floccus and altocumulus undulatus

Altocumulus stratiformis undulatus