Altocumulus lenticularis

(Section 2.5.2.4.3)

This type of Altocumulus appears as lens-shaped patches of Altocumulus. Its vertical extent is usually not more than 200 m (660 ft), although orographic Altocumulus lenticularis may be much deeper.

Below the cloud. Viewed from below, this cloud appears diffuse. It is frequently partly translucent, occasionally with irisation near the Sun. It is either completely white or white and grey.

Within the cloud. Turbulence is usually weak, but it may be moderate.

Above the cloud. Viewed from above, a thin Altocumulus lenticularis can be transparent enough to reveal the ground, but it still looks fairly dark. Thick Altocumulus lenticularis looks white, and bright glories may be observed on it.