乱らん層そう雲うん

noun

nimbostratus

A thick, dark, low-level cloud that brings continuous rain or snow. Technical term used in meteorology.

• 乱らん層そう雲うんは雨あめや雪ゆきを長ちょう時じ間かん降ふらせる雲くもです。

  Nimbostratus is a cloud that brings rain or snow for long periods.