Mammatus

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  Mammatus in the evening

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  Cumulonimbus with mammatus

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  Dark Cb mammatus

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  Cumulonimbus with mammatus formed after Hurricane Catarina in Santa Catarina, Brazil, 2004

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  Another view of the post-Catarina mammatus formation

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  Globular mamatus clouds with radar in foreground.

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  Mammatus clouds in Tulsa, Oklahoma, 1973

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  Mammatus clouds.

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  Mammatus clouds.

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  Mammatus clouds.

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  Mammatus clouds seen near the Twin Cities, Minnesota USA

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  Mammatus clouds in San Francisco

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