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Sky before the storm. Dark clouds cumulonimbus before the storm.
Ominous thunderclouds over landscape with trees and city buildings
A dramatic and ominous sky filled with thick, dark grey storm clouds (cumulonimbus), indicating an impending heavy rainstorm. A tiny bird in the distance provides a sense of scale to the massive cloud formation.
Crows sitting and flying among the silhouetted bare branches of a tree against a cloudy sky, creating an ominous atmosphere
Dramatic looking sky and clouds with mountain background in high desert, near Arizona Utah border

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