I say this every year, but I don't grade til April. Its minimal, but March/April does have a slight impact on my grade. It will likely be in A-/B+ territory, and certainly no lower than a B+
I love the endless cold/snowcover as you know, so it was really an excellent winter. No huge storms (biggest mby 6.2", biggest DTW 6.1") and an almost comical no white Christmas (considering the continuous snowcover that began in late November) are the only real mars on the grade. I wouldve liked to kept the snowpack into March but deep winter started unusually early, so wont dock for that.
I never count this into grades, but it seemed locally that the models had an atrocious winter performance. There were both rugpulls and last minute surprises.
AWSSI still has Detroit in an "extreme" winter. A mild March would likely knock it down to "severe" but no further.
https://mrcc.purdue.edu/research/AWSSI/chart?stn=DTWthr
You can definitely see it was an eastern sub winter. Some random cities rankings to date:
Mild- International Falls
Moderate- Minneapolis, Des Moines, Quad Cities, Rockford
Average- Chicago, Milwaukee, Green Bay, Alpena
Severe- Sault Ste Marie, Saginaw, Grand Rapids, Fort Wayne, Toledo, Indianapolis
Extreme- Detroit, Flint, Columbus, Dayton, Cleveland