CHICAGO — While still very much in developmental stage, indications are a good portion of the Chicago area may well be in line for a significant accumulating snow beginning Saturday afternoon into early Sunday and then a second surge later Sunday into Monday. A short wave aloft looks to trigger a center of low pressure moving out of the northern Rockies through Iowa across northern Illinois.
The initial National Weather Service outlook graphic for projected snowfall from 6PM Saturday to 6PM Sunday has the Chicago area included in the southern portion of a 10 to 40% chance of 4-inches or more (see area inside 10% blue line on the highlighted map above). Additional snow may fall the following 24-hour period 6PM Sunday to 6PM Monday as the eastward-moving center of low pressure passes overhead.
Repeating this storm system is still in its formative stages, but individuals planning travel over the next few days into the first part of next week should closely monitor upcoming forecasts.