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Sunny to partly cloudy
Variable clouds with a shower
Sun giving way to clouds
Mostly cloudy and milder
of sunlight, then sets at
of moolight, then sets at
While snow will be gone from the Boston area by Sunday, the chill will hang tough to end the 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.