Models have converged on a similar scenario this weekend into next week. It appears there will be widespread 1-3" of rain under the deformation zone with some areas receiving 4-6". Every model shows this now. Unfortunately, there is still a possibility of a major screw zone. This morning's Euro does exactly that for southeast Iowa. The Euro is very strong and stalls the low right over me or just west. Southeast Iowa gets major dry-slotted while a ton of rain falls to the nw.
The UK, on the other hand, has eastern Iowa near the western edge of the heavy stuff. The Canadian has 1-3" from Nebraska through Michigan. An average of the current models would be fine, but that Euro scares me.