I was so busy the day before that I didn't even look at anything. Magically, the 12Z data was available at exactly 12Z and after looking at it DEEPLY for 5 minutes, I've decided to get on the road (the chase vehicle was already packed) and I'm on my way to Hebron, Nebraska. Should be there (at the rate I drive) by 1830Z. Will have a look at 18Z data when I get there.
Like the left exit region, the clearing and the vort max that should be rotating through later on.
Better call SCOTT HAMMEL and see if he wants to come with before he heads down to Amarillo....
EDIT: Just saw Danny posted the 18Z update... will have a look at that shortly.