Experienced weather-watchers might be able to help me out here - is this a Cumulus Congestus tower? It just kept on getting taller and taller until the whole thing fell apart. I wish now that I'd taken a wider, more general shot to show this tower was the only one like it visible in the sky at the time. [Meganisi, Greece. Canon 1300D converted to 720nm Infrared with a Voigtländer 90mm Lanthar].
Undulatus Asperitas clouds above Pissonas area on Evia island Greece. I saw this type of clouds for the first time, although in my area often similar impressive atmospheric phenomena are created, especially in the spring and autumn. The clouds remained on the sky for a few minutes only and then dissolved. The photo was taken on May 6th 2018 at 17:48 local time.