What's behind this warm December... and will it last?

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Meteorologist Chris Sowers discusses our unusually warm December weather. (WPVI)

The coat racks remain full as people venture outside in t-shirts as these unseasonably warm temperatures continue.

But why is it so warm outside, and what does this mean for the rest of the winter?

Meteorologist Chris Sowers take a look at what's happening now, and what you can expect... including the early word for the week of Christmas!
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