It's a warm front lifting north, but the flow begins to turn and accelerate a bit Saturday morning and eventually pushes it southwest. So maybe semantics, but I wouldn't say it's just a warm front lifting north.
Just looking at the EPS, ridge retros a tad west into the Plains which could allow for warm front to stall nearby or just west, but still looks AN. Usually when that happens you get a pulse or two of good WAA.
Heights look to be AN for awhile. Obviously at the surface AN heights don’t mean a whole lot if we are wedged, but that’s a good sign of mild weather even if you get just a little sun and are inland.