See everyone talking about the weather preset as if it generates weather in which it doesn't. The whole program only enhances the rgb and looks of the sim. The weather preset gives u visuals on adding extra cloud layer which is less predictive of the current cloud conditions. Its only for looks. Either use to live weather or a weather program if u want weather generation. Actually I like Atmos alot! Great application. Worth the money for sure. I use Active Sky for weather generation.