Veil of Cirrostratus

Cirrostratus over Cedar Falls on April 23, 2019

A sheet of ice in the form of cirrostratus covered part of the sky. A sharp edge to the cloud is a common sight with this cloud type. Cirrostratus always allow the disk of the Sun or Moon to be visible (although not in this photo because the Sun was out of position). If a cloud looks similar to this but blocks the disk of the Sun it is classified as altostratus - a mid-level cloud found between 6,000 and 18,000 feet above the ground.