スパイラルバンド雲うん

noun

spiral band

Meteorological term for a spiral-shaped cloud band, often associated with typhoons or large-scale weather systems.

• 台たい風ふうの外そと側がわにスパイラルバンド雲うんが観かん測そくされた。

  Spiral band clouds were observed on the outer edge of the typhoon.