- A weak high based shelf cloud along an outflow boundary
- W030238Z
- Dying showers in the background have sent out a slow-moving outflow boundary. The shelf cloud along it is weak since the air mass change is gradual and modest. It is also high based since the cool air has warmed slightly and become drier. The forward push has enough lift to cause a faint crease to appear along a second, higher layer in the cloud line.
-
+