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Partly sunny and milder
Mostly sunny and pleasant
Clouds breaking; much colder
of sunlight, then sets at
of moolight, then sets at
A mainly rain event is shaping up for midweek in the Washington, D.C., area. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.