Rare cloud formations you’ve probably never noticed

Most of us know cirrus, cumulus -- the "big three" clouds dominate that our weather apps. But the atmosphere is capable of far more theatrical displays. From waves that look like the ocean to shimmering lights in the edge of space, these rare formations are the "Easter eggs" of the sky. (Source: Photo by wikimedia commons )

Asperitas Clouds: Asperitas clouds create dramatic, rough looking skies. They appear like rippling waves viewed from below. This cloud type was officially recognised only in 2017. (Source: Photo by wikimedia commons )

Fallstreak Holes: Also called hole punch clouds, these appear as circular gaps in cloud layers. They form when ice crystals suddenly fall out of the cloud. The result looks strangely artificial. (Source: Photo by wikimedia commons )

Kelvin Helmholtz Clouds: Named after a wave pattern, these clouds resemble breaking ocean waves. They form when wind speeds differ between layers of air. Their appearance is brief and rare. (Source: Photo by wikimedia commons )

Lenticular Clouds: Lenticular clouds look like smooth, stacked lenses or flying saucers. They form over mountains when stable air flows across peaks. These clouds are often mistaken for UFOs. (Source: Photo by wikimedia commons )

Mammatus Clouds: Mammatus clouds form as pouch like structures hanging beneath larger clouds. They are often seen after intense thunderstorms. Their unusual shape makes them instantly recognisable. (Source: Photo by wikimedia commons )

Noctilucent Clouds: These clouds appear high in the atmosphere and glow after sunset. They are made of ice crystals and are visible during twilight. Noctilucent clouds are among the highest clouds on Earth. (Source: Photo by wikimedia commons )