The only way that storm doesn’t cut in that pattern is if the pattern is fluid and transient. There’s been a few storms over the years (never KUs because of the speed) that have run over 40-70 in a setup such as that. They usually occur right at the start of the cold outbreak which as we know is rare. In general when you see a pattern shift, even a brief one the snow event usually occurs several days or more in. Then immediately after the storm the ridge out west breaks down again it moves into the plains and we go right back to warm. If that ridge holds there for 7-10 days behind the storm and the pattern isn’t transient that thing cuts most of the time