[Faline]

Asperitas, formerly proposed under the name undulatus asperatus, was added to the World Meteorological Organization's International Cloud Atlas on March 23, 2017. It was classified as a supplementary cloud feature rather than a new cloud type, marking the atlas's first addition since 1951. It appears as a rough, turbulent underside with pronounced wave-like structures.

The cloud formations represented include Kelvin-Helmholtz waves, cirrus radiatus, shelf clouds classified as arcus, mammatus, Morning Glory roll clouds, lenticular clouds, a cumulonimbus incus or anvil, noctilucent clouds, asperitas and polar stratospheric clouds. Kelvin-Helmholtz waves form where layers of air moving at different speeds shear past one another. The collection spans several locations and dates rather than documenting a single weather event.

[Viking64]

Cool pics!! Interesting thread.

[collaredgirl65]

Beautiful pictures. I have seen the shelf clouds alot. Rolling in over the Lake, following the front across.

[kellyhound]

like the ufo and shelf clouds.
Never saw them myself.

[Sharon]

Amazing, beautiful thread! I used to stare at clouds and you end up seeing all manner of shapes in them. Very cool.

[VaBusa]

Truly amazing photos! I'd love to see some of these in person...just beautiful

[Faline]

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[davidcopafeel]

Polar Stratospheric Clouds AKA Blue waffle clouds

[Bastet]

Clouds are awesome, like paintings in the sky

[Sharon]

Believe it or not, it’s the lenticular cloud. Due to their amazing shape, lenticular clouds are often mistaken for UFOs.

No wonder