Roanoke Tornado
One of the composition characteristics shown in some of these photos that I enjoy tremendously is the juxtaposition of the weather phenomenon with the mundane, day-to-day. Specifically, I love the tornado moving near the backyard filled with old metal lawn chairs. There's just something about the extraordinary in close proximity to the ordinary that really makes an interesting wx shot (or any photo, for that matter).
Usually these are taken by non-chasers, looking out windows or out back porches. I did see a couple of pictures by an Indiana chaser from earlier this year of a tornado in the background and a graveyard in the foreground. Nice shot(s).