We have a weather pattern here in the Coachella Valley like this frequently. Since there is a 10,000 foot mountain on the left side of this photo, and an 11,000 foot high mountain on the right, the clouds get caught in the middle. The middle is Banning, Beaumont, Calimesa, and Yucaipa. It was like this all day yesterday. The clouds were just caught there and didn't move. The rest of the Coachella Valley was sunny, but not in the pass. They do make an interesting photo!