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Mostly sunny and milder
Cloudy to partly sunny
Cooler with rain tapering off
of sunlight, then sets at
of moolight, then sets at
Unseasonably cold conditions will hold in the Pittsburgh area through this weekend, before temperatures moderate early next week. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.