本ほん曇ぐもり

noun

low-cloud overcast; thick cloud cover

Meteorological term for a sky completely covered with low clouds, darker and heavier than a thin overcast. Often used in weather forecasts.

• 明日あしたは本ほん曇ぐもりで、午ご後ごから雨あめが降ふるでしょう。

  Tomorrow will be overcast with low clouds, and rain will fall from the afternoon.