Cinematic 8K 7680×4320.Approaching storm clouds in variable weather.Thick dark stratonimbus clouds covered the sky.Gray storm cloud in forecast.Windy storms are coming.Nimbostratus is a multi-level, grey amorphous, nearly uniform. In meteorology, an aerosol comprising a visible mass of minute liquid droplets, frozen crystals, or particles suspended in atmosphere. Mixed mix thermal cyclone heavy overcast wind atmospheric climate time lapse black nimbus stratocumulus fading clearing after different strata layer layers air weather airflow nature depressing gloomy.