Clouds of the Day - Sunday, May 28, 2023
/Finally, the clouds are back. After days of clear skies these striking mid-level clouds appeared around sunrise. This view looks east at a large sheet of Altocumulus stratiformis undulatus. Breaking the name down translates to high cumulus in a stratus sheet with undulations. The undulations, or waves, are caused by gravity waves which are ripples in the air flow similar to waves we see on water. The waves are in a layer that is stable, which means the waves will have limited vertical development that oscillate within the layer.