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Why is this winter's cold so persistent?

Name: Why is this winter's cold so persistent?
Uploaded: 2014-01-23T18:33:00-0500
Duration: 1 min 26 s
Description: The arctic oscillation is in a negative phase, allowing the jet stream to take a big dip across the eastern U.S. Meteorologist Eric Fisher of Boston CBS station WBZ reports on when it will begin to warm up.

The arctic oscillation is in a negative phase, allowing the jet stream to take a big dip across the eastern U.S. Meteorologist Eric Fisher of Boston CBS station WBZ reports on when it will begin to warm up.