18K views · 194 reactions | UFO clouds? Wave clouds? Hole punch clouds? We explain the science behind these 7 rare clouds (and their real names!) | Met Office | Facebook

Rare wave-shaped clouds appeared off the coast of New Jersey recently. These are known as Kelvin-Helmholtz wave clouds and are formed similarly to ocean waves, where high winds blow over the water, sculpting the flat water into wave formations. In the atmosphere, which acts similarly to a fluid, this happens between two layers of different air densities. | AccuWeather