The image above shows the jet stream wind speed projection for Sunday evening. I drew in the black line to show the tilt of the storm system, which should be negatively-tilted for this event. The negative tilt matters in this situation, as negatively-tilted storms tend to produce more "intense" severe weather events than positively-tilted storm systems (which involve the storm pushing to the southwest). The jet stream should be absolutely screaming when this event begins, with the NAM forecast above maxing out above 110 knots. The active jet stream will lead to this event being maximized in the severity, in terms that whatever severe weather that occurs on Sunday should be of decent significance (i.e. damaging winds and possibly a tornado).
Here's my current diagnosis of the situation.