The cold air is firmly in place and this will set the stage for a late season winter storm to affect parts of the Midwest and Great Lakes late in the weekend. Low pressure developing east of the Rockies tonight and Saturday will travel east through Oklahoma and Arkansas Saturday and into southern Illinois and Indiana by Sunday. This current storm track would keep the heaviest accumulating snow through Kansas, Nebraska, Missouri, southern Iowa, central Illinois and central Indiana where over half a foot of snow could fall by Sunday night. Winter Storm Watches have already been issued in advance of the storm. Further north, the snow accumulations would begin to taper with possibly a few inches falling in northern Illinois and southern Wisconsin. It's important to note that a slight shift north in the storm track is possible and if that were to occur it would mainly affect the counties just south of Rockford. The storm track likely won't shift too far north due to the negative phase of the NAO (North Atlantic Oscillation) which has kept the cold in place these past several days. Either way, you'll want to keep an eye on the forecast for this weekend should a track shift occur or if you have any travel plans downstate.
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