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Nice with clouds and sunshine
A p.m. t-storm in the area
Partly sunny and more humid
Periods of sun with a shower
Following the thunderstorms of early in the week, the Nation's Capital will see cooler and less humid air midweek. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.