- Storm cloud evolution by propagation with lowering baseline
- W952650Z
- Storm cloud evolution by propagation. A single propagation step occurs here when a weak thundershower at right provides the barrier for updrafts to build on its south side at left. The dark, lowering base has a group of rising towers above it which will become the next storm while the older one evaporates. Several lines in the base show how the low-level flow converges on the new updraft.
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