Cirrus spissatus - These clouds sit right at the top of the troposphere. A thick, dense cirrus layer that dominates much of the sky above, often formed by passing warm fronts or the remnants of a cumulonimbus incus.

Where are cirrus clouds found?

The thin, wispy clouds known as “cirrus” cover nearly a third of the globe and are found high in the atmosphere—5 to 10 miles above the surface.

What part of the atmosphere are cirrus clouds in?

The Natural Atmosphere

Ice clouds, also called cirrus clouds, are made up of ice crystals and start to form at altitudes of 5.5 km in temperate regions and of 6.5 km in tropical regions, making them the highest clouds in the troposphere.