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

beautiful cloudy sky clouds are thickening rain heaven cloud condensation weather power grey sunlight moody gloomy cyclone threatening summertime climate cloudscape storm thunder dramatic meteorology thunderstorm wind background stormy forecast ominous stratosphere descriptive abstract warning hope cumulonimbus outdoors horizontal no people changing photography scary shadow color image gray nature dark overcast scene light scenic beauty freedom