Thursday, December 2, 2010

Typical La Nina Winter in our Area

The arrival of cold temperatures coincides well with a typical Central NC and VA La Nina winter.  Shorter wavelengths in the Jet Stream pattern allow features which normally would correlate well to warm to temporarily favor cold conditions.

Please forgive the terrible art work.  As winter deepens and waves of circulation broaden average temperatures rise above average resulting in long stretches of mild and dry weather,  Shortly after mid January a natural surge of Atmospheric Angular Momentum creates a condition which pushes the cold winter weather region into the east.  Once that bout of real winter is over then a thaw dominates until Valentines Day.
The best chance for a Winter Storm is shortly after Jan 15

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