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Fort Smith/Fayetteville News | 5newsonline KFSM 5NEWS | Get the local news and weather where you live from 5NEWS. Covering Fort Smith, Fayetteville, Bentonville, and all of Northwest Arkansas and the River Valley.

Kelvin-Helmholtz wave clouds explained

These clouds resemble waves breaking on an ocean surface, but what exactly are they? How are they formed?