They’re known as asperitas clouds, which can also resemble rippling ocean waves, according to the National Weather Service. They seem to appear in conditions when the atmosphere is unstable.

Scientists have discovered that ocean waves may become far more extreme and complex than previously imagined. The new study, published in Nature today, reveals that under specific conditions, where ...

Waves — generation and types. Waves provide about half the energy to do work at the coast. Ocean waves are generated by wind blowing over the ocean surface. The stronger the wind, the longer it ...