- A vigorously boiling Cumulonimbus crowned with Pileus cap
- W013298Z
- A vigorously boiling tower of Cumulonimbus is crowned with a soft dreamy Pileus cap. The tightly focused updraft in this small storm carries air straight up to great heights before trailing forward as an anvil (out of view). The continuous push of air up against the strong flow aloft creates a bend in that flow which condenses a separate Pileus cloud as a soft, fuzzy white area at the top.
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