From the National Weather Service. A potent low pressure system will move out of the Great Plains and across the Midwest at the end of this week. The low will traverse Illinois overnight Friday and early Saturday, and we are confident that this low will produce ample precipitation and that temperatures will be cool enough in Wisconsin for snow. The only question is where will the low track. Our current forecasted low track, shown below, puts southern Wisconsin in a prime location for significant snowfall accumulations as the low moves across central Illinois. Currently, we are forecasting 3-5″ of snow across the area.