How much rain we get still up for debate. No matter what, bring an umbrella to the High School football games Friday night. The NAM and GFS (two of our favorite american models) have half an inch to an inch of rain (max). The Euro is slower with a full fledged rainstorm and 1"-2"! (See below).
I'm more inclined to agree with the Euro at this point due to the slow nature of cut off lows. The storm will be "cut off" from the jet stream so it's not in any hurry to move out. On Thursday the storm will spin over the upper midwest. By Friday the storm crawls over the Great Lakes region. And it will take until Saturday before the low kicks up into eastern Canada.Right now the HPC seems to be in agreement with 1"-2" rainfall estimates for Friday.