The light to steady snowfall from Friday morning added up to 0.2" in Rockford, bringing our seasonal total to 5.4". This is still around 10" shy of the seasonal average through today's date, however.
Additional snow will come down through the night in the form of scattered flurries and light snow showers. Within the broad area of scattered snow showers, we may see some pockets of brief downbursts. Within those areas, expect quick drops in visibility along with a coating of snow on untreated surfaces. Such snow showers and flurries could linger through 4/5AM.
Our next round of accumulating snowfall looks to arrive late Saturday evening through Sunday morning. The highest area of forcing will be to the North along the track of the low-pressure center, while a trailing cold front will provide the forcing locally. Light to steady snow may be possible from 11PM Saturday night through early Sunday afternoon.
All told, the two rounds of snow tonight and tomorrow night could provide an additional 1-2" of accumulation for most in the Stateline, highest amounts to the North closer to the track of the low-pressure center. Below is an example from one computer model of how much snow we could see.
Our next rush of Arctic air will arrive early next week with a strong push of cold air advection Sunday night into Monday. This could bring a period of gusty winds along with the bitter cold, dropping wind chills well below zero at times Monday into Tuesday.
Forecast temperatures early in the week are in the teens with overnight lows in the single digits and even near zero Monday and Tuesday nights. Wind chills Monday and Tuesday will be near or well below zero at times. Wednesday will start the warming process, with overnight lows only dropping 5-10° from Wednesday's high. Thursday will feature highs back in the upper 20s.
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