Rainfall has been plentiful across southern Indiana and central Kentucky so far in 2013. The graphics below indicate rainfall accumulations through the year for Louisville, Lexington, and then Bowling Green. In each plot, the green line represents rain as it accumulated through this year. The blue line is how it accumulated during the wettest year-to-date on record (for Louisville that was 2011), whereas the red line is for the driest year-to-date on record. The brown line represents a "normal" year.
Over the course of this week models are coming in line with a frontal boundary stalling somewhere near the Ohio Valley Wednesday to Friday. Moisture feeding in from the Gulf of Mexico looks to bring soaking rains into the region. The graphic below is the Weather Prediction Center's forecast for 7-day rainfall totals, highlighting that feed of moisture along and ahead of the front.