First of all, this is what the sky looked like when I left work. Pretty amazing.
(click for wallpaper size)
But then, driving into Madison, things got weird. Look at this wall of clouds it looked like I was driving into. I've never seen anything like it. I didn't get any real good pictures driving beneath it while I was in Madison. It appeared to be a group of fast moving clouds (going south, maybe?) that were only about 20 or 30 feet above the ground. Bizarre.