Thick, puffy clouds roughly the size of a fist.

Large, puffy clouds that expand to larger than a fist, and can sometimes take up the whole sky. ("puffy blanket")

Puffy clouds that are smaller than a fist (around thumb-sized).

The smallest cumulus clouds, located highest in the atmosphere. Usually around fingernail size.

Storm cloud with lots of height! Very large cumulus clouds that often cause heavy but fast rainfall.

A blanket cloud! This cloud is low in the atmosphere, and covers the sky. This cloud is responsible for fog.

Clouds that cover the whole sky (like stratus). These are farther up in the atmosphere than normal stratus clouds, but not as far up as cirrostratus!

A very thin, see-through blanket cloud made of cirrus clouds. This cloud is high in the atmosphere. (note the subtle 22° halo in this picture!)

Causes rain for a long period of time, and can completely cover the sun. These clouds look like a dark blanket over the sky.

Thin, wispy clouds high in the atmosphere.

The trail of clouds left behind from a flying aircraft.

Forms when light passes through ice crystals and forms a circular shape around the sun.

Occurs in very thin clouds. Light can be seen in cloud formations that are close to the sun.

Rays of sunlight that break through the clouds and form streams of light that hit the ground.

Rays of sunlight that can be seen shooting up from the clouds (opposite crepuscular rays).

Occurs during rainfall and is in the opposite direction of the sun.

Light refracting through ice crystals- this can be seen as iridescence or bright light on either side of the sun.

A bright area of light surrounding the sun/moon, that is also surrounded by color.