DVN isn't impressed:
The 12Z model suite has shown more phasing than past runs with the
upcoming system. The QPF has shifted north, resulting in models
producing typical advisory levels of snow over the CWA and the
rest of northern IL. However, no model run has really indicated a
closed mid level circulation in this phasing, thus the
precipitation should be mainly driven by WAA and not be long
lasting or heavy in the cold side of the system (not a persistent
def zone). While I am on board with increasing pops to likely for
this event, we may not have a cold boundary layer over our region,
and that could greatly limit any snow accumulation until the
Arctic front arrives Wednesday night, and once again, unless
there`s reason to draw moisture back over the cold air, that
process should shut down the widespread rain/snow. Snow showers
may develop with low level lapse rates peaking in the gusty Arctic
transition.