- A large storm cloud rain-free base moves overhead along a boundary
- W001021Z
- A large storm cloud rain-free base moves overhead along a boundary. The rising air condenses here but the reason for the very textured underside highlights is harder to ascertain. It could be small-scale downdrafts from falling raindrops, evaporating Virga, or mixing in of moisture from nearby showers that causes the condensation level to be so variable over small distances.
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