Those are the clouds that look like flying saucers. I love them a lot. They’re usually formed in mountainous environments—the relatively moist air from lower in the atmosphere flows up the mountain and cools down significantly, making it condense into a cloud in that iconic saucer shape.These clouds are somewhat elusive because they’re typically short-lived and localized. As the air moves down the other side of the mountain and sinks lower in the atmosphere, it “dries out,†and the cloud disappears.So now if you see one, you’ll know what it is, but you can still pretend it’s a spaceship. I sure will.