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Mostly cloudy and colder
Mostly sunny and very cold
Some sun, then clouds
of sunlight, then sets at
of moolight, then sets at
Boston will lie on the northern edge of a 1,500-mile swath of snow, slippery roads and travel disruptions for a time on Thursday. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.