4 more basic types of clouds

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‘Cirrus - Like their name suggests (which is Latin for "curl of hair"), cirrus are thin, white, wispy strands of clouds that streak across the sky. Because cirrus clouds appear above 20,000 feet (6,096 m)—an altitude where low temperatures and low water vapor exist—they are made up of tiny ice crystals rather than water droplets.  Cirrus typically occur in fair weather. They can also form out ahead of warm fronts and large-scale storms like nor'easters and tropical cyclones, so seeing them can also indicate storms may be coming. NASA's Earthdata site quotes a proverb that sailors learned to warn them of coming rainy weather, “Mares’ tails (cirrus) and mackerel scales (altocumulus) make lofty ships to carry low sails.”

Cirrocumulus - Cirrocumulus clouds are small, white patches of clouds often arranged in rows that live at high altitudes and are made of ice crystals. Called "cloudlets," the individual cloud mounds of cirrocumulus are much smaller than that of altocumulus and stratocumulus and often look like grains. Cirrocumulus clouds are rare and relatively short-lived, but you'll see them in winter or when it's cold but fair.

Cirrostratus - Cirrostratus clouds are transparent, whitish clouds that veil or cover nearly the entire sky. A dead giveaway to distinguishing cirrostratus is to look for a "halo" (a ring or circle of light) around the sun or moon. The halo is formed by the refraction of the light on the ice crystals in the clouds, similarly to how sundogs form but in an entire circle rather than just on either side of the sun.  Cirrostratus indicate that a large amount of moisture is present in the upper atmosphere. They're also generally associated with approaching warm fronts.

Cumulonimbus - Cumulonimbus clouds are one of the few clouds that span the low, middle, and high layers. They resemble the cumulus clouds from which they grow, except they rise into towers with bulging upper portions that look like cauliflower. Cumulonimbus cloud tops are usually always flattened in the shape of an anvil or plume. Their bottoms are often hazy and dark. Cumulonimbus clouds are thunderstorm clouds, so if you see one you can be sure there's a nearby threat of severe weather (short but heavy periods of rainfall, hail, and possibly even tornadoes).‘ (Source) 

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Let’s continue - How Much Does a Cloud Weigh?

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