(11:30PM - 12/27/21) A storm system is expected to move through the region on Wednesday. This storm system will have to potential to produce a period of accumulating snow across Northern Illinois, Wednesday midday through early Wednesday night.
A storm system will develop in the Mid-Mississippi Valley Wednesday morning, then moving through the Ohio Valley into Wednesday night. This storm system will have the potential to produce a period of accumulating snow across Northern Illinois, Wednesday midday through early Wednesday night. There is still uncertainty and model disagreement regarding this potential. Stay tuned for future updates.
An area of snow is expected to develop across Iowa and Northern Missouri Wednesday morning. This area of snow will expand, and then moves northeastward across the north half of Illinois, midday Wednesday though early Wednesday night, before ending. It is possible there that there will be a corridor of mixed precipitation along the rain snow line as well. It is looking increasingly likely that there will be the potential for minor snowfall accumulation across a large portion of the northern half of the state with this event.