Epic supercell thunderstorm clouds in Kansas from photographer Camille Seaman. - This is the stuff that literally gives me nightmares! Thank God I've never lived in Kansas or else I would have to be on anxiety medication.
MAMMATUS clouds are most often associated with the anvil cloud & severe thunderstorms. They often extend from the base of a cumulonimbus but may also be found under altocumulus, altostratus, stratocumulus, & cirrus clouds as well as volcanic ash clouds^