- Close-up of anvil knuckles under an outward moving cloud flange
- W942232Z
- Close-up of anvil knuckles under the edge of an outward moving anvil cloud flange. An older, earlier stage is flat and frozen, but the new one is still in the process of slowing down as it slides away from the centre of the updraft area. The “toes” or “knuckles” only appear initially, when outward pressure is at its maximum.
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