Cc compared with Ac

(Section 2.3.2.6.3)

Cirrocumulus is distinguished from Altocumulus by:

• Most elements being very small (an apparent width of less than 1° when observed at an angle of more than 30° above the horizon)
• Not having any shading
• No halo (uncommon in Altocumulus and usually only a partial halo when of a circular nature)