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Partly sunny and colder
Sunny, but frigid
Partly sunny and not as cold
of sunlight, then sets at
of moolight, then sets at
While frigid conditions will encompass the Chicago area over the next couple of days, the weekend will offer a break from the bitter cold. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.