Two sites I use from time to time and have been about as accurate as anyone are saying central Iowa is going to get buried in snow (12-18") about a week from now.
Weather discussion from NWS:
"There is a pattern change in the offing however. After the last aforementioned weak
front, our recent extended period of northwest
flow will cease leading to short wave ridging Monday, and eventually a transition to southwest
flow as a western
CONUS trough matures. This will lead to the warmest temperatures we`ve seen for awhile, with highs into the 30s or 40s depending on location. The warm up won`t last long however with the long wave
trough progression eventually pushing a
front through the Midwest again. This will return colder air, mainly beyond the valid period into next week, but also return precip chances as kinematic and thermodynamic forcing both increase. Details on timing and NW to SE
baroclinic zone position are unclear, but deterministic and
ensemble solutions all suggest precip of some form returning sometime in the late Mon to Wed window."
I don't pretend to understand all that, but it sounds like a solid "maybe".