Daily Postcard: Feather clouds drift across the sky Tuesday afternoon above White Rock. As the name cirrus  suggests, (which is Latin for ‘curl of hair’) cirrus clouds are thin, white, wispy strands of clouds that streak across the sky. Because cirrus clouds appear above 20,000 feet (6,096 m)—an altitude where low temperatures and low water vapor exist—they are made up of tiny ice crystals rather than water droplets. Source: ThoughtCo.com. Photo by Nancy Ann Hibbs