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Altocumulus clouds form over the upper Columbia Gorge. With some vertical extent they may denote the presence of elevated instability...
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Columbia Cloudscape

Upper Columbia River Gorge

Altocumulus clouds form over the upper Columbia Gorge. With some vertical extent they may denote the presence of elevated instability, especially in the morning. They are harbingers of change. Photo © copyright by Robert Faucher.

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