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December pattern discussion, part II


Typhoon Tip

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I posted this in the other thread but rightfully so that one is getting less attention at this point ...

 

there might be a period/burst of light snow on Boxing day, but that is unrelated to a new wave that has emerged in the fast overall flow translation since this thread began...  

 

The last several GFS cycles have sharpened up this feature, now having even a slight negative orientation with strong mid-level wind max cutting over or just under our latitude(s), centered on hour 60.   It's greatest currently modeled limitation is the lack of antecedent baroclinicity in the region from the OV to the upper MA, as the current best axis for that is being evacuated seaward; the ambiance won't have recovered in time (at least it doesn't appear that it could).  The 12z Euro also has a very energetic mid-level evolution with this same feature, and the RH fields of all products suggests some saturability of the column, so one would think with that much dynamics cutting over-head we'd get a pulse or too of UVM and at least some shredded banding.   

 

Not a big deal, but adding some air affects to the holiday

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Yestwrday the talk was one mild day and then it's off to epic ness. Now there's 55 degree high dew soueaster thrown in

 

 

There was no talk of a warm rainstorm. Not one comment about that. It's nbd but let's not act like that was talked about as going to happen

 

Most of us assume people look at the models at the very least and the red tag stuff is just value added discussion.

Also depends on how you define epic. Will it get cold? Absolutely. Will the cold be wire to wire with no chance of a bad storm track when the PV wobbles? Absolutely not. 

 

Hopefully santa brings you some reading comprehension skills :) 

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