The 30min Rotation Track is useful for a recent history of storm motion and evaluating the historical shear values in the recent half hour. Two other velocity couplets seen farther south of the main tornado in the bottom right Vel window show small tracks in the left window, but shear values are much lower overall. In this case, the 60-min rotation track is a little less useful due to another line of storms moving in from the west. The window is more cluttered, making it harder to single out the exact location of a rotating storm vs a recent storm that has already passed out of the area.