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Pattern December Dud 👀

Even tries to hold on longer to the ridging poking into Greenland

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Noticing the Aleutian trough starts to slowly back away to the west on the euro ensemble as it loses the upstream westerly momentum kick from this week’s +EAMT and planetary vort advection. We probably see another wave break over the NW territories or Alaska (-EPO) at some point
 
The Euro storm looks very much like the 2 December ‘58 analog storms. Northern stream wave drops down into the Southern Plains with cold trough established in the east

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19581211 shown as top analog date

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We always struggle with having a consolidated SE Canada move out and leaving behind some energy to phase with the southern energy. In the past few years, we've matched the general pattern, but I've noticed that there always seem to be little vortex pieces that get stuck, and we can never entirely fix them as models progress. The 1958 storm does an excellent job of consolidating the energy (see attached). The 12z Euro is a bit of a mess. I hope we can fix this look, and it's good that we have something being spit out

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Only way I can really see this pattern breaking down or resetting is a return of the -PNA some time in mid to late December or so if the Aleutian trough backs really far away into Eurasia. Starting to have some doubts that happens tho. Problem with the -PNA here in the long run is the MJO will be encroaching on the west pacific and the +AAM in the tropics should resist too much retraction.
 
Only way I can really see this pattern breaking down or resetting is a return of the -PNA some time in mid to late December or so if the Aleutian trough backs really far away into Eurasia. Starting to have some doubts that happens tho. Problem with the -PNA here in the long run is the MJO will be encroaching on the west pacific and the +AAM in the tropics should resist too much retraction.
If that happens then it will be a December to Remember
 
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