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Optical Effects
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Although mamma (mammatus) usually form on the base of a cumulonimbus anvil, they can also form on other cloud types such as stratocumulus, altostratus, or in this case, in a subtle way within altocumulus, spotted here over Monte Porzio Catone, Rome, Italy.
Mixed sky at sunset over Monte Porzio Catone, Rome, Italy
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A multi-colored sunset over Monte Porzio Catone, Rome, Italy
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Cirrocumulus undulatus over Monte Porzio Catone, Rome, Italy
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A dissipating storm system over Monte Porzio, Catone, Rome, Italy.
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A storm system over Monte Porzio Catone, Rome, Italy.
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A sunrise over Monte Porzio Catone, Rome, Italy.
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A storm system over Lofoten, Norway.
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A storm system over Monte Porzio Catone, Rome, Italy.
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A sunset over Monte Porzio Catone, Rome, Italy.
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An asperitas formation over Monte Porzio Catone, Rome, Italy.
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A sunset over Rome, Italy.
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A sunrise over Tuscany.
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