Evening fog rolling in, Santa Barbara

The thing that looks like a large cloud on the ground between the palm trees and the mountain is our evening fog. It is caused by the marine layer. A warm cushion of air from further out in the Pacific that slides in across the cool coastal waters. The water is cool here because it follows the pacific currents down the coast from cold places in the north.

Given the right conditions, the fog slides in as the sun goes down and will not leave the beach till around ten in the morning. Of course, in June, the fog covers the whole city and only leaves for about ten minutes in the afternoon. We call that "June Gloom".

As long as you can stay back from, or above it, it is actually very beautiful. My office at UCSB used to sit at the perfect point at the limit of the fog. I could watch it swirl outside my window, but it never really got to my office.