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December pattern/forecast thread


weathafella

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3 minutes ago, OceanStWx said:

Is this in general, in this event, do you have anything to back that up?

What I mean is if you are looking a snowmaps..for example .. the Rgem just just shows a general outline without showing specific terrain in terms of resolution accuracy. Compare the 12z Rgem with the 3km NAM snow maps..Not that it's performance is better. We don't know if it is or isn't. 

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that looks like decent "sw flow event" there on the last several cycles of the operational gfs ...now day 5.5 from 12z this morning.  

its been quite consistent with a taking some weak/moderate intensity cyclone through the BUF route with enough boundary layer resistance to the east of new england to prevent warm sector penetration ... leaving the region in an ib burst that probably ends as light drizzle/freezing drizzle.  

total speed of system translation in a screaming anomalous neptunian flow is probably actually helping that because it's shut off and backside lock down about as fast as it swaths through. 

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