Kelvin-Helmholtz Clouds

These relatively rare and striking clouds resemble evenly-spaced rolling ocean waves. They occur when a faster-moving wind at higher levels scoops up the cloud within the layer below, which then 'breaks' forward - much as a wave does at sea. These clouds are named after Hermann von Helmholtz and William Thomson, Lord Kelvin, physicists who studied turbulent airflow.

Kelvin-Helmholtz Clouds