Ah I remember a trof that was going to pick up Katrina. It did-somewhere up north. We must all realize that as long as Irma turns north-even if it turns in Texas- they were RIGHT!
http://www.intellicast.com/Storm/Hurricane/CaribbeanSatellite.aspx?animate=true
There seems to be some kind of force/front keeping the outer band arms limited to a straight SW-NE line...