Good chance for increasingly cold conditions throughout ...

Dec 18, 2009 · It appears that the coldest air will arrive after day 10. Also of interest from the CPC include the Analog years that are showing up with similar December upper air patterns and indices. They include: December 12-22, 2005, December 3-13, 2002, December 7-31, 1995, December 19-31, 1985, late December 1977, and late December 1963. ................
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