The storm system that is going to bring snow to most of my area overnight is continuing to come together. The surface low in Missouri will center itself near Peoria, Illinois around daybreak. Snow, moderate to occasionally heavy will fall until mid-morning Wednesday.
Here's the latest snowfall forecast from the 18z EURO. These are based on a 10:1 ratio. These will be higher as you go northwest into Iowa.
A larger perspective centered on the Great Lakes.
Here's the latest warnings and advisories for my area.