All cloud types
“Wispy ice crystals painting the digital sky”
Formation
Ice crystals in jet stream winds
Weather signal
Fair weather, change in 8-10 hrs
Technical specs
Altitude20,000-40,000 ft
AppearanceThin, wispy, hair-like streaks
Fun factCan form 'Virga' - precipitation that evaporates before reaching the ground.
common
Etymology
Latin for 'curl of hair' or 'fringe'