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Sunshine and pleasantly warm
Very warm with sunshine
A couple of p.m. t-storms
of sunlight, then sets at
of moolight, then sets at
Monday is shaping up to be Philadelphia's warmest day so far this year, kicking off a week that will be dominated by summer warmth. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.