Mammatus, or mammatocumulus, is a name for "pouch-like" patterns that hang from the base of clouds. They're often seen during severe weather events. Here are five photos of mammatus clouds, as sent in by you.
Volcan-ado spotted in Iceland
Something very interesting was captured in Iceland - a volcanado?
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'Where the powerful storms now live'
If the pattern continues, it could spell a record-breaking hurricane season for ...