![](http://www.alamy.com/thumbs/6/E9EF5074-12FB-4DBD-9547-B2DE9CFCD611/2GDD242.jpg)
Sunlit cumulonimbus storm clouds above mammatus clouds in Calgary, Canada
The trees below the clouds are a Balsam Poplar riparian forest in the Bow River Valley
Size: 3772px × 4500px
Location: Calgary, Alberta, Canada
Photo credit: © Rosanne Tackaberry / Alamy / Afripics
License: Licensed
Model Released: No
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