- A bubbling bank of Cumulus cloud with Altocumulus above
- W013352S
- A bubbling bank of Cumulus cloud with an arc of finely detailed Altocumulus above it. The long bank of showers is growing to the left while the cloud drifts to the right, resulting in a net forward motion at right angles to its orientation. A wind shift and cooler air behind it is putting pressure on the axis, forming an Arcus-like forward ledge at the base.
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