Cirrus

Cirrus clouds are thin, wispy clouds that form high in the atmosphere as their water vapor freezes into ice crystals. Cirrus is one of the principal types of clouds.

Cirrus clouds moving from the southwest indicate falling temperature; moving from the northwest they indicate the probability of rising temperature.

He looked at the sky and saw the white cumulus built like friendly piles of ice cream and high above where the thin feathers of the cirrus against the high September sky.

The blue sky is glossy and fat with heat, a few thin cirri sheared to blown strands like hair at the rims.