Altocumulus castellanus cloud

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Science and technology

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What Wikipedia says

In meteorology, Altocumulus castellanus or Altocumulus castellatus (ACCAS) is a cloud type named for its tower-like projections that billow upwards from the base of the cloud. The base of the cloud can form as low as 2,000 metres (6,500 feet), or as high as 6,000 metres (20,000 feet).

Excerpt from the Wikipedia article “Altocumulus castellanus cloud”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Janne Naukkarinen, Public domain, via Wikimedia Commons.