Cinematic 4K 60 fps. In meteorology, a cloud is an aerosol comprising a visible mass of minute liquid droplets, frozen crystals, or particles suspended in the atmosphere above the surface of a planetary body. Variable weather clouds temperature profile interaction between radiation convection sunlight air saturated straight layer layers grey tones vapor mix mixed orchards overcast moisture homosphere troposphere stratosphere mesosphere cloudy clouded skyless sky flat line bright dark black clean white blue uhd 3840×2160.