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A shower possible
Warmer; a shower in the a.m.
Sunshine; breezy, colder
Partly sunny and colder
Partly sunny and not as cold
The temperature roller-coaster ride will continue through St. Patrick's Day for the Boston 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.