These fascinating undulatus asperatus clouds appeared over Mount Triglav, Slovenia on April 7, 2016.
Look at the unbelievable beauty of these strange clouds – some even show iridescence by photographer Simon Petric. Mesmerizing!
Undulatus asperatus is a cloud formation, proposed in 2009 as a separate cloud classification by the founder of the Cloud Appreciation Society.
If successful it will be the first cloud formation added since cirrus intortus in 1951 to the International Cloud Atlas of the World Meteorological Organization.
The name translates approximately as “roughness”. Although they appear dark and storm-like, they tend to dissipate without a storm forming.
The ominous-looking clouds have been particularly common in the Plains states of the United States, often during the morning or midday hours following convective thunderstorm activity.
And now watch the awesome video:
This is one of the most impressive asperatus event I’ve ever seen in pictures and video. Just awesome!