Transverse banding over California

GOES-17 “Red” Visible (0.64 µm) and Near-Infrared “Cirrus” (1.37 µm) images, with pilot reports of turbulence [click to play animation | MP4]
One of the pilot reports over Salinas, California at 2150 UTC (below) indicated Clear Air Turbulence (CAT) at an altitude of 30,000 feet — this suggests that the aircraft might have been flying just above or below the actual cirrus bands.