Clouds

0-6,500 ft, Low uniform layer resembling fog but not resting on the ground. May produce drizzle.

0-6,500 ft - amorphous layer of dark gray clouds. On of the primary precipitation producing clouds.

6,500-20,000 ft, Stratified veil of clouds that is generally thin and may produce very light precipitation. When thin, the sun or moon may still be visible as a "bright spot" but no halos are produced. 

6,500-20,000 ft White to gray clouds, often made up of separate globules; " Sheepback" clouds.

Above 20,000 ft - Thin, delicate, fibrous, ice-crystal clouds. Sometimes appear as hooked called "mares tails".

Above 20,000 ft. Thin sheet of white, ice-crystal clouds that may give the sky a milky look. Sometimes produce halos around the sun and moon. 

Above 20,000 ft. Thin, white, ice-crystal clouds. In the from of ripples or waves, or globular masses all in a row. May produce a "mackerel Sky". Least common of high clouds.

0-6,500 ft. Dense, billowy clouds often characterized by flat bases. May occur as isolated clouds or closely packed.

Lens-shaped clouds, are common in rugged or mountainous topographies.

0-6,500 ft. Towering cloud, sometimes spreading out on top to form an "Anvil head" Associated with heavy rainfall, thunder, lighting, hail, and tornadoes.