https://www.raindrop.farm/rainfall-totals/zipcode/52411

Last 24 hours, put in your zip code in upper right to get your rainfall

I think it's in the ball park if not perfect.

Others may have other maps.  This one seemed to be the best that I've located.

Others
https://www.iweathernet.com/total-rainfall-map-24-hours-to-72-hours
https://www.iweathernet.com/interactive-radar  click on a spot and it shows the amount of rainfall
LINK TO RIVER levels