- A squall line storm is coming in fast, heralded by a thin Arcus cloud
- W003679Z
- A squall line storm is coming in fast. Just ahead of the rain is a long, thin Arcus cloud formed by the ascent of outflow air. Above and ahead of it, clouds are shaped by the low-level flow along and toward the line, as can be seen in the curving lines of convergence.
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