Cirriform Clouds

Cirriform Clouds are composed of small particles which are mostly ice crystals. The particles are fairly widely dispersed, so the clouds are relatively transparent and white in appearance. Cirriform Clouds generally have bases above 20,000 feet in the Gulf area, and are classified as high clouds. They include all varieties of cirrus, cirrocumulus, and cirrostratus clouds.
Concept Mapping Toolkit
Insitute for Human and Machine Cognition
The University of West Florida