Lenticular cloud above the volcano Kamen | Photo : Korotnev AV, taken in Ust-Kamchatsky District, Kamchatka Krai, Russia. Lenticular clouds were always my favorite. Easy to identify, and remember their name because they look like a lens!
https://flic.kr/p/nubWE | Ocean Storm | A lovely afternoon storm rolling in off the east coast of Florida. There was no post processing done on this - it actually looked much more spectacular in person.