To my eye, there's a clear consensus on the CAMs that by 18z Sunday, accumulating snow starts for higher elevations/NW suburbs, and by 00z Monday everyone is snowing.
NAM is the most aggressive with the flip to accumulating snow. We've seen the opposite before, where the NAM tries to flip us to sleet and we all laugh, until it happens. Hopefully the NAM is getting the vertical profiles correct and we all win.
Based off the 18z suites thus far, mostly short term guidance, the changeover window for many is 15z in the far western suburbs to 19z for the I-95 corridor. Will be very interesting to see how this plays out tomorrow from a nowcasting standpoint.