13,000 to 39,000 feet above sea level.
Cirrus clouds are at a high altitude.
Cirrus clouds are high-altitude clouds.
High, wispy clouds are generally categorized as cirrus clouds.
Cirrus clouds are thin, wispy clouds usually formed at high altitudes.
The most usual form of high-level clouds are thin and often wispy CIRRUS clouds. Cirrus clouds are usually found at heights greater than 20,000 feet. Cirrus clouds are composed of ice crystals that originate from the freezing of supercooled water droplets.
Noctilucent clouds are the highest and least understood. Cirrus and cirrostratus are the high-type clouds. Any high cloud will have the prefix "cirr".
cirrus clouds
Cirrus clouds.
Cirrus cloyds are clouds that are thin and wispy! They are found high in the sky.
cirrus
Cirrus Clouds!
cirrus