-40° in Copenhgen NY
You can see the -30s to -40 pretty clearly across MN, WI, MI, ON, NY on IR satellite as the snow surfaces show up green on this image.
It’s more hang back mid level goodies as the upper trough approaches and eventually swings through Mon night. Probably high ratio dendritic aggregates (think clumps of dendrites that cling together). Usually it’s like a 3/4sm high end -SN but it accumulates really efficiently.