Looking over the the meteograms with kcae as the target, noticed over the last few runs of the american models; we end up right on the edge during the heart of precipitation... even the nam wants around 32F...
Being right on the edge at 32F tends to not end up in major ice accumulation, especially in heavy precipitation due to latent heating (heat given off as water forms a solid in this case). The mean temperature is around 35F (but this could be skewed by the most warm model GFS)
KCAE alluded to a changeover to rain even in the central Midlands in their latest forecast discussion.
Good signs that the surface is warming up on the NAM around here, but we are still days away.