This community is for pictures and videos of clouds, weather and all sorts of atmospheric phenomena.
Some good links for identifying stuff:
The International Cloud Atlas is a great resource on observing the sky and the weather. The definitive authority on cloud classification.
Atoptics is a more thorough resource on atmospheric optical phenomena.
Rules:
1. Keep it real. Editing images to bring out existing colours and features is allowed. More artistic edits should be marked with [edited] in the title.
2. Mark your original content with [OC] in the title.
The cloud itself was mostly Altocumulus stratiformis with some lenticular elements embedded. This was in southern Finland last December.
I increased saturation a bit and adjusted the colour temperature in post to filter out most of the overbearing yellow of the sunlight. The original picture:
