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Pleasant and warmer
Sunny and very warm
Partly sunny and very warm
A p.m. t-storm in spots
of sunlight, then sets at
of moolight, then sets at
Following spotty showers and thunderstorms at midweek, warmth is set to return to the Philadelphia area by this weekend. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.