The Chicago National Weather Service Forecast Office has issued a Winter Storm watch for potentially heavy snow across the Chicago area beginning later Tuesday afternoon – continuing overnight ending Wednesday forenoon. A total of 5 to 9 inches of snow could occur along and south of Interstate-80 with 2 to 6 inches to the north. The evening commute could be impacted Tuesday evening with the start of the snowfall and the morning commute Wednesday morning could be complicated by remnant snow as well as some blowing and drifting.
Low pressure moving out of the southern plains northeast up and just south of the Ohio River Valley is expected to spread snow as far north as our area Tuesday into Wednesday. Note on the National Hazards map below the extent of the Winter Storm Watch area (shaded in blue – running west to east through Illinois all the way to western Pennsylvania. Winter Storm Warnings and Advisories are already in effect today and tonight for portions of Kansas, Oklahoma and Missouri.
National Hazards Map