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Partly sunny and nice
Sun through high clouds
of sunlight, then sets at
of moolight, then sets at
Just when it was starting to feel like the dog days of summer again, fresh cooler and less humid air will settle over the Boston area for 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.