Pictured are what I believe are cumulus clouds above Boulder, CO, ~1:15PM MST (19:15 UTC). The camera faced southbound and upward as the sun is visible behind the clouds on the right of the frame. In post, high contrast and black/white colorspace allowed for the flows to be more visible.

Taken on a Canon EOS T7i, 19mm, 1/800, f/9, ISO 100.

Pictured above is ceilometer data for Oct. 12. We can see that clouds at the time of shooting were in the range of 4 to 7 km above ground.