cirrus

Wind shear can occur in wispy cirrus clouds or even in clear air near thunderstorms, as differences in temperature and pressure create powerful currents of fast-moving air.

Sun halos are optical illusions created when ice crystals form in the correct shape in the upper atmosphere, usually accompanying thin, wispy cirrus clouds.

Those harmless-looking vapor trails sometimes spread out to form thin cirrus clouds.

Soot triggers the formation of contrails and 'contrail cirrus', which are line-shaped clouds produced by aircraft engine exhaust.

The remaining, thinner cirrus clouds would allow more long-wave radiation emanating from Earth to escape to space.