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A couple of showers of rain or snow
Cloudy with snow showers
Mostly cloudy, a snow shower
Colder with a snow shower
Mostly cloudy and very cold
As the first of several waves of arctic air sweep southeastward across the Midwest, just enough snow will occur to cause slippery travel over a broad area into Monday. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.