Cirriform

Science / Weather / Cirriform: Clouds composed of small particles, mostly ice crystals. Because the particles are fairly widely dispersed, this usually results in relative transparency and whiteness, often producing a halo phenomena not observed in other clouds forms. These clouds generally have bases above 20,000 feet in the mid-latitudes, and are classified as high clouds. They include all varieties of cirrus, cirrocumulus, and cirrostratus clouds.

Parhelion

Science / Weather / Parhelion: The scientific name for sun dogs. Either of two colored luminous spots that appear at roughly 22 degrees on both sides of the sun at the same elevation. They are caused by the refraction of sunlight p MORE

Sun Dog

Science / Weather / Sun Dog: Either of two colored luminous spots that appear at roughly 22° on both sides of the sun at the same elevation. They are caused by the refraction of sunlight passing through ice crystals. They are mo MORE

High Clouds

Science / Weather / High Clouds: A term used to signify cirriform clouds that are composed of ice crystals and generally have bases above 20,000 feet. The main types of high clouds are cirrus,cirrocumulus, and cirrostratus. This alti MORE

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