KIND's Aviation discussion describes the challenges for their forecast quite well..
The challenges begin when it comes to the degree of warming aloft
with the system and ultimately the impacts that will have on
precip type...especially Saturday morning. There continues to be a
zone where mixed precipitation looks likely near and just south
of I-70. Model soundings though bear out the challenges in precip
type as temperatures near freezing exist between 2500 and 4500 ft
for several hours near and after daybreak Saturday. Any
fluctuation of a few tenths of a degree either way could be the
difference between mainly snow and a mixture of snow...freezing
rain...sleet or even rain.