Astronaut Luca Parmitano captured from ISS the Altocumulus Clouds in the Great Plains of southeastern U.S.

Credit: Luca Parmitano, ESA, NASA

Altocumulus is a middle-altitude cloud genus that belongs mainly to the stratocumuliform physical category characterized by globular masses or rolls in layers or patches, the individual elements being larger and darker than those of cirrocumulus and smaller than those of stratocumulus. Altocumulus is commonly found between the warm and cold fronts in a depression, although this is often hidden by lower clouds. Towering altocumulus, known as altocumulus castellanus, frequently signals the development of thunderstorms later in the day, as it shows instability and convection in the middle levels of the troposphere.

The local scenery on the ground is as follows.

Credit: Wikipedia

Reference: Luca Parmitano’s Tweet
See earthview photo gallery: LiVEARTH