Daily Postcard: Cirrus fibratus clouds are spotted wisping across the sky Saturday morning on the way down the hill from Los Alamos, near Pojoaque High School. Cirrus clouds often produce hair-like filaments—similar to the virga produced in liquid–water clouds—called fall streaks, and are made of heavier ice crystals that fall from the cloud. The sizes and shapes of fall streaks are determined by the wind shear. Photo by Nancy Ann Hibbs

Cirrus fibratus clouds spotted in the sky Saturday morning on the way down the hill from Los Alamos. Photo by Nancy Ann Hibbs