"Check out this phenomenon in Birmingham, AL today! This phenomenon is called Kelvin-Helmholtz clouds. A brief description from the Cloud Appreciation Society: "The breaking waveforms of Kelvin-Helmholtz clouds are the result of shearing winds up at cloud level. A particular type of turbulence can develop in a layer of cirrus cloud, which happens to form below an inversion …between air currents of differing speeds and/or directions. Sea waves break as their bases are slowed down upon reaching shallow water and their crests surge ahead. Cloud waves break in the same way: when their crests are pushed ahead of their troughs by the difference in air currents." (source)
Also, can we just appreciate that there is an organization called the Cloud Appreciation Society?