(1:30PM Sat Jan 7th) Precipitation in the from of snow/sleet/freezing rain/rain has been overspreading the state this morning, associated with the storm system moving through the region.
This morning there was a period of snow showers that brought a dusting of snow to portions of Northern Illinois. In the wake of that activity, the main area of precip has spread into portions of Western and Northern Illinois this morning and early afternoon, with many areas reporting sleet or freezing rain. Some locations near the Illinois/Iowa/Missouri border area have already received up to 0.10″ of ice accumulation.
This main precip axis is expected to spread across the entire state this afternoon and into tonight. With cold surface temperatures and warm temps aloft, a mix of snow/sleet/freezing rain is expected to be the main combination for the duration of the event across Northern and much of Central Illinois. Further south, after initial freezing rain concerns, precip will change to plain rain across Southern Illinois with warming temps. Precip will end from west to east tonight across Northern and Central Illinois, with precip lingering across Southern Illinois into Monday morning.
Final snow/sleet accumulations will be a dusting to under 1″ for much of Northern and Central Illinois. There’s an outside chance portions of Eastern Illinois could receive a bit more should a longer period of snow occur. Additionally, ice accumulation will be a big concern. Much of Northern and Central Illinois expected to see a glaze to 0.10″ of ice accrual, with potions of West-Central Illinois receiving up to 0.25″ of ice accrual. The combination of precp types, especially the freezing rain, will cause travel issues.