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Altocumulus undulatus. This formation occurred during a transition from
altostratus to altocumulus. Looking NW from Cheyenne at 9:11 A. M.
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Image ID: wea03011, NOAA's National Weather Service (NWS) Collection
Location: Wyoming, Cheyenne
Photo Date: 1933 January 5
Photographer: H. Floreen
Category: Weather Wonders/Clouds/
• High Resolution Photo Available
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