That's Virga in the second photo. Precipitation that evaporates before it reaches the ground
Not from the description I find. K-H should be smooth waves. But I'm not an expert in clouds, so don't take my word for anything! Whatever they are it's a terrific photo.Kelvin-Helmholtz clouds. I think!
You could start a whole new conspiracy theory with that picture! Really amazing.View attachment 93923
Kelvin-Helmholtz clouds. I think!
Looks familiar and similar to the clouds discussed in these old threads:View attachment 93923
Kelvin-Helmholtz clouds. I think!