stratus clouds look like gray, shapeless blankets that cover most of the sky. They are usually only about 0.8 kilometer thick, but they can be almost 1000 kilometers wind. When you see stratus clouds, you might soon see rain. Stratus clouds are low-level clouds that are located quite close to the ground. In fact, sometime they lie on the ground or the ocean, and then they are called fog. A stratus cloud forms when warm, wet air move slowly over an area of cooler air. The warm air rise, cools, and changes into water droplets. The droplets join together and create a stratus clound.