Slammed In The Snow Box...

Here's a different look at NEXRAD radar - this is a dual polarization product.  It uses radar to estimate how much liquid precip has fallen in the last hour.  It gets updated every 5 minutes, when the NWS radar completes it's volume scan.  Where it comes in handy for us here is that it can give us a pretty darn good guesstimate of where the most intense activity is occurring, especially in a diffuse radar return.  You can see that in this snap shot I have marked up the track of the intense snow, and circled the core of it all (yellow shading).

Jackson and South Central Michigan, don't worry, our time will come for the heavy stuff later on this afternoon and evening.  Now bear in mind while you look at these features that the whole thing will also have an eastward direction of travel.  This smaller mesoscale feature of the core of the storm continues to move in the direction indicated as it heads east.