These clouds are a combination of the cirrus clouds and the cumulus clouds higher in the sky.
cirrocumulus
These clouds are thin, wispy, and feathery looking and usually indicate that a weather change will follow.
cirrus
These dark, dense, and low clouds almost always signal rain or thundershowers.
nimbus
These clouds are mostly seen in summer and are thick, fluffy and white like cotton. They are a sign of lovely hot weather.
cumulus
These flat clouds form near the Earth's surface (so they are very low) and cover a large portion of the sky. They signal stormy weather and also cause fog.
stratus
Long white trails left behind by airplanes are actually high cirrus clouds called ________.
contrails
The sky is usually a dark color when these clouds are present because they are full of moisture.