- Severe storm cloud evolution: sharp wedge-shaped forward edge
- W930571Z
- Severe storm cloud evolution. The cloud in W930567S has become a new storm cell behind the forward edge, with a separate rain curtain from the parent storm to the right. But as the sharp boundary moves into higher dewpoint air, its base lowers and shows the full wedge shape, which was not visible with the higher bases earlier. The streamlined shape of this dramatic Arcus cloud belies the violent 100mph winds to come.
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