TWC

Ion’s upper-level energy, which brought snow to the Rockies on Saturday, will pivot eastward into the nation’s midsection through early Sunday. As a result, low pressure will begin to develop over the Southern Plains and then head towards the eastern Great Lakes by Sunday night.

This will lead to the development of widespread accumulating snow from Missouri to Illinois, Indiana, Ohio and southern Lower Michigan Saturday night through Sunday. The National Weather Service has issued winter storm warnings for portions of these states.

The snow will be heavy at times and will be accompanied by increasing winds, which will lead to low visibility and very poor travel conditions Sunday.

(MORE: Winter Storm Alerts | Interstate Forecast)

As our forecast map to the right shows, we will see a wide area of 5 to 8 inches from eastern Missouri to Illinois, Indiana, northern and western Ohio and southern Lower Michigan. Embedded in this swath will be a corridor of heavier snow where some locations could see up to 12 inches. This includes St. Louis, Champaign, Ill., Indianapolis, Toledo, Ohio, Cleveland and Detroit.

Chicago will see an initial band of snow along the Arctic cold front through Saturday night. Additional accumulating snow is expected through Sunday, resulting in storm totals of 5 inches or more in parts of the metro area.

(FORECAST: Chicago | St. Louis | Indianapolis | Toledo, Ohio | Detroit)

In parts of Kentucky, northern Arkansas, Tennessee, West Virginia, southwestern Pennsylvania and southern Ohio, there will likely be a transition from rain to snow Sunday into Sunday evening. Overall, snow accumulations will be lighter in most of these states.

This changeover from rain to snow or a wintry mix could extend as far south as portions of northern Mississippi, northern Alabama and northern Georgia late Sunday into Sunday night. Although accumulations will be light, slick travel conditions are possible given that the arriving blast of cold air will likely freeze any moisture on the roads.

Ion will also begin to impact the Northeast on Sunday, but with a different outcome from what we just saw with Winter Storm Hercules.

Sunday - Monday: Ion Slides Through the Northeast

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