| Small cumulus or towering cumuli are the norm, but large thunderstorms are quite possible if there is enough instability. |
| We saw the skyscrapers, the tilting plane, the awful impact, the cumuli of dust engulfing the streets. |
| Clouds run the gamut here, from the menacing cumulonimbus of an approaching storm to the fluffy white paradisiacal cumuli of a fair-weather day. |
| White clouds rising in the east gather into cumuli, with an increasing blackness along their lower portions. |
| The cirri disappeared by degrees, and the cumuli towered up on the horizon in colossal masses. |
| The moon emerged from behind a cloud, touching with a delicate sepia some fleecy edge of cumuli. |
