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Beautiful, spring clouds in the blue sky, which portend the change of weather.

Gloomy clouds portend impending rain or storms, casting shadows and creating an eerie atmosphere.

Skyline of the city of Barcelona (SPAIN) at dawn that portends a storm.

Autumn with clouds that portend rain.

Autumn with clouds that portend rain.

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Clouds and sky

Image used under license from Freestock.com<a href="https://www.freestock.com/free-photos/clouds-sky-741066">Image used under license from Freestock.com</a>

Clouds and sky

Image used under license from Freestock.com<a href="https://www.freestock.com/free-photos/clouds-sky-741067">Image used under license from Freestock.com</a>

Clouds in a blue sky

Image used under license from Freestock.com<a href="https://www.freestock.com/free-photos/clouds-blue-sky-585162">Image used under license from Freestock.com</a>