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Times of clouds and sun
Sun and areas of low clouds
Plenty of sunshine, but cold
of sunlight, then sets at
of moolight, then sets at
While blustery winds will usher in colder air on Christmas Day, milder air will then quickly return to Pittsburgh on 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.