Open cellular patterns can often be found behind cold fronts in the cold unstable air, and produce multiple cloud types including cumulus congenstus, cumulonimbus, and stratocumulus clouds.
en.wikipedia.org It also forms from the outflow of tropical cyclones or the anvils of cumulonimbus cloud.
en.wikipedia.org Cumulonimbus clouds, commonly called thunderheads, can produce high winds, torrential rain, lightning, gust fronts, waterspouts, funnel clouds, and tornadoes.
en.wikipedia.org Satellite pictures showed a vortex arrangement consisting of three cloud masses and two arching bands of cumulonimbus clouds, all of which were producing cirrus outflow.
en.wikipedia.org The best-known is cumulonimbus with mammatus, but the mamma feature is also seen occasionally with cirrus, cirrocumulus, altocumulus, altostratus, and stratocumulus.
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