As far as attaching goes, perfect mate! Subject and composition are great. Have a go at cranking your contrast right up and down to see what you can get definition-wise in cloud structure, I usually find myself tricking the camera into taking low exposure shots (expose for the highlights, ie the brightest things in the image) then brightening the image later - or vice versa depending on whether I want the foreground dark or part of the subject.
However, this thread is only for practice and as Dave pointed out in the inital post this post (and any others) are..erm..disposable? If you fancy ID'ing those subjects and popping them into the Photographic Weather Reference Library for posterity? The work you've put in would definitely be appreciated.
BTW appreciated the intros to those images, looking forward to more in the future Martin! :) [y]