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Partly to mostly cloudy
Some sun, then clouds; warm
Cloudy, a little rain; cooler
of sunlight, then sets at
of moolight, then sets at
More seasonable conditions will return to the Pittsburgh area this weekend, following late-October warmth through Friday. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.