Monsoon season persists in Arizona this year. Looking southeast from the Fortuna Foothills in the Yuma area. Dark, rapidly moving clouds passed through the area bringing several inches of rain in a couple of hours. In this picture one can see the bands of rain reaching to the ground from this large storm cloud.

iPhone SE (2nd generation), back camera, 3.9mm, f/1.8.

Cropped, improved contrast and white balance, using Affinity Photo on a Mac Mini M1.