Image #1 The most effective image for me.
Image #2 Next best. Sorry, the cropping bothers me. It feels like there is too much image on the right side. Unfortunately, the natural crop point is smack dab in the middle of a nice cloud formation but I feel the sun needs to be in the centre for this one.
Image #3 Interesting subject. I think this one would be improved by cropping out the top 1/3 of the sky. I think it actually dimisses the effectiveness of the rest of the sky. IMHO
Overall... interesting subject material. Not badly executed overall.
Looking forward to more!