Although an altocumulus cloud tends to lack the power and drama of its big sister, the cumulonimbus
Although an altocumulus cloud tends to lack the power and drama of its big sister, the cumulonimbus … or the puffy presence and growth potential of its younger brother, the cumulus … it does have one trick up its sleeve.On the rare occasion an altocumulus will display colorful irisations. For that short moment it’s definitely the coolest cloud in the sky. -- source link
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