1. Altocumulus (Ac): These clouds are characterized by white or gray patches of rounded masses that appear in sheets or layers. They are often described as "cotton-ball" or "sheep-like" in appearance.
2. Altostratus (As): These clouds appear as a gray or bluish sheet that covers the entire sky. They can be thin enough to allow the sun to shine through, creating a "halo" effect.
While these two types of clouds are common between 20,000 and 6,500 feet, keep in mind that cloud heights can vary depending on location and weather conditions.
