Whew, thank goodness. The half-day hangup line had been right over me in Butler on models for the past 1.5 days, I was growing concerned.
Realistically though, the models are all gridded, so we won't have 1km-by-1km outputs until we get closer to the event. 3km, 12km, 30km are all large grids that leave out a lot of details so that line definitely has some wavering that can't be displayed on the NAM or GFS.
Edit: "Wavering" = Uncertainty