That third shot, WOW. Loving the clouds, I would love to witness such amazing sights in my lifetime.
The first shot is feeling a bit to GND'd, with the extremely dark mountains on the horizon, and the perfectly exposed grasses in the foregrounds. Maybe consider dropping that foreground exposure a bit, or making it a bit more moody, and brightening the dark mountains on the left and right a tiny bit? Not much, but I think a little would help...
#2 really does it for me. I love the composition ... it really makes the lenticular clouds feel big and special. The jagged peaks along the bottom also hold interest really well, compared to #3 where the foreground is a bit more of a dud. I particularly like the way the soft forms and lines of the clouds contrast so sharply against the rough and ragged peaks. Really nice!
