beautiful cloudy sky. the clouds are thickening. the sky before the rain

abstract are background beautiful beauty changing climate cloud clouds cloudscape cloudy color condensation cumulonimbus cyclone dark descriptive dramatic forecast freedom gloomy gray grey heaven hope horizontal image light meteorology moody nature ominous outdoors overcast people photography power rain scary scene scenic shadow sky storm stormy stratosphere summertime sunlight thickening threatening thunder thunderstorm warning weather wind