Milwaukee county doubled turnout of Waukesha in 2012. Something like 500,000 to 250,000. This was overall turnout.
https://en.m.wikipedia.org/wiki/United_States_presidential_election_in_Wisconsin,_2012
This year just for advance voting, Milwaukee is at 128,000 and Waukesha is at 88,000. This might indeed be favorable for tomorrow.
Need some Wisconsin people to weigh in.