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Towering cloud associated with thunderstorms and extreme weather, can extend high into the atmosphere with an anvil-like top, often producing heavy rain, thunder, lightning, hail, and tornadoes.

High altitude clouds, thin and wispy appearance, indicating fair weather but can suggest an approaching storm if they thicken into a veil.

Low altitude clouds, puffy and cotton-like, with flat bases and significant vertical development, associated with fair weather, but can grow into larger storm clouds.

Low, lumpy cloud layers with blue sky often visible between individual cloudlets, can form rows, patches, or rounds, not usually associated with significant weather, but can produce light precipitation.

Dark, gray cloud layer that is usually observed covering the sky across a wide area. This cloud type is thick, often blocking out the sun, and is associated with continuous rain or snow.

Mid-altitude clouds, lead to overcast skies, often forming ahead of storms with continuous rain or snow, thinner than nimbostratus, allowing the sun or moon to appear as if through frosted glass.

High, thin clouds covering the sky, commonly leading to a halo effect around the sun or moon, indicate moisture and a warm front that may precede overcast skies and storm systems.

Mid-level clouds, appear as gray or white patches often composed of globular masses or rolls, associated with fair or unsettled weather, may indicate thunderstorms if they gather on a warm, humid morning.

High altitude cloud characterized by small, white patches, ripples, or waves, indicates atmospheric instability at high altitudes, and can suggest the approach of a cyclone.