stratocumuliform of cirrus clouds illuminated by the afterglow of sunset over a dark blue sky.

afterglow atmosphere bad bizarre change cirrocumulus cirrus climate clouds cloudscape cloudy cumuliform dusk environment lightning mountain mountainside mountaintop natural nature nephology nimbostratus ominous perturbation rain rainstorm rainy rough sky skyscape squall storm stormy stratiform stratocumuliform stratosphere sundown sunrise sunset thunder thunderhead thunderous troposphere twilight unusual weather wind windy