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Regarding the potential winterstorm of February 5-7


winterymix

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The Southern Stream seems to come alive with abandon.

In the h500 images below, antecedence on February 5, there are

conflicting geometric renditions of shortwaves (GFS vs. EURO) but the major pieces are in much

the same place on both models.  The persistent ridge in the west is helpful.

Cold air is abundant and moisture is abundant.

Arguing against the storm are:

a.  this is a east-based NAO or more like (+)NAO.

b.  the hemispheric pattern is not really what Wes tells us to look for in analog

4" and 8" DC snows.  It is not a classic pattern for a snowstorm.

c.  Will there be enough vorticity at upper levels to induce a storm at the surface,

the pattern seems more zonal than meridional?

 

 

Still, the GFS looks nice at the surface.

 

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