noun
cumulonimbus; thunderhead; towering summer cloud
Refers to the large, towering clouds typical of summer, often associated with thunderstorms. The term is more evocative and descriptive than the technical 積乱雲.
See also: 積乱雲
夏の午後、入道雲がもくもくと湧き上がった。
On a summer afternoon, towering cumulonimbus clouds billowed up.
入道雲が出てきたから、夕立が来るかもしれない。
Since thunderheads are appearing, we might get an evening shower.