Lake-effect snows finally winding down over northwest Indiana – sub-zero wind chills return

Update 10:30PM CST…

The lake-effect snow showers have worked their way east out of Lake and Porter Counties in Indiana and will gradually diminish as the night goes on. However, with over a half-foot of snow in some areas during the past 24 hours,  roads will still be icy and traffic slow around the south end of Lake Michigan traveling  into northeastern Indiana and north into southwest Lower Michigan.

Temperatures are falling off across the Chicago area and by early Wednesday morning subzero wind chills in the -10 to -20-degree range will be prevalent, especially in locations well inland of Lake Michigan.

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Update 12:15PM CST…

The Winter Weather Advisory for Lake and Cook Counties in Illinois has expired. Snow showers will gradually diminish and rotate out of these counties into northwest Indiana this afternoon. A Winter Weather Advisory continues for Lake and Porter Counties in northwest Indiana where snow showers should continue into tonight with additional accumulations of 2 to 6-inches possible in areas closest to lake Michigan. 

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CHICAGO — Winter Weather Advisories (purple-shaded areas on the highlighted map) in effect, as Lake and Cook Counties in Illinois may experience an additional 1 to 3-inch snowfall this Tuesday morning with the snow rotating southeast into Lake County Indiana and continuing this afternoon and evening.

A Winter Storm Watch (dark-green-shaded area on the highlighted map) for 6-inches or more snow remains in effect for Porter County, Indiana, east and north into Lower Michigan today and tonight into Wednesday morning. Travel will be slow with roads/highways close-in around the lake snow-covered and slick.

Convergence over southern Lake Michigan associated with slowly departing low pressure will continue to generate lake-effect snow showers around the south end of Lake Michigan for the next 24 to 36 hours (see Regional weather radar depiction map below). The counter-clockwise rotating area of snow will slowly pull off to the east, accumulations probably ending early this afternoon in northeast Illinois and later in northwest Indiana tonight.

Sub-zero wind chills will exist area-wide this morning with single-digit temperatures combining with a west to northwest winds to create wind chills generally ranging from zero to -10-degrees close-in and from -10 to -20-degrees in areas farther away from Lake Michigan where cloud cover is thinner. Note the Wind Chill Advisory (light-blue-shaded areas) calling for -15 to -25-degree wind chills this morning in west-central and central Illinois and central Indiana.

Regional weather radar...

 

Wind chills...