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A thunderstorm in the area
A couple of thunderstorms
Humid with clouds and sun
of sunlight, then sets at
of moolight, then sets at
Thunderstorms and showers will persist in the Chicago area throughout the holiday weekend, bringing the risk of disrupting outdoor activities and weekend plans. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.