¥Other cloud types
¥Kelvin-Helmholtz - billowed clouds
that resemble breaking
waves and form in strong wind shear
¥Nacreous - thin, sometimes iridescent
clouds in stratosphere
(30 km height) (mother of pearl)
¥Noctilucent - thin clouds in upper
mesosphere (80 km
height), seen in polar twilight (night-light)