(10:30PM - 1/22/22) A storm system is moving through the region tonight into Sunday. This storm system will bring a period of accumulating snow across portions of Northern and Central Illinois, tonight through early Sunday morning.
A weak and fast moving storm system moved from the Northern Plains today, and will move through the Midwest tonight, and then into the Mid-Appalachians Sunday morning. This storm system will bring a period of accumulating snow across portions of Northern and Central Illinois, tonight through early Sunday morning.
Model guidance has been trending northward with this storm system over the past 12-24 hours. Real time observations support that continued model trend, thus we have once again shifted the snowfall axis northward. Additionally, model guidance continues to show the potential for a corridor of higher snowfall totals near the Illinois/Wisconsin border, thus we have increased snowfall totals a bit for portions of far Northern Illinois.
An area of snow has spread into portions of Northern Illinois late this evening and early tonight. Snow is likely across Northern Illinois for a several our period of time tonight, before ending early Sunday morning. Snow intensity will generally vary from light to moderate for the duration of this event, with snowfall rates up to or in excess of 0.5" per hour at times.
Snowfall totals upwards of 1-3" are expected across much of Northern and portions of Central Illinois with this event, with totals upwards of 2-5" likely near the Illinois/Wisconsin border.
Below is the snowfall forecast for this event.