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December Medium/Long Range Discussion


yoda
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5 hours ago, Ji said:

Did eps lose the blocking and ao?

 

5 hours ago, CAPE said:

The AO trends basically neutral and the NAO slightly positive by the end of the month. Btw that area of +heights on the means focused in the WA is not exactly the block we want.  50-50 high!

It is very encouraging that all 3 major ensembles temporarily spike the AO as two TPV lobes merge but all 3 immediately give it the boot and tank the AO again within a couple days.  The best news is we are well into the point where the last few years there was ample evidence the look up top was going to be trouble.  Especially last year when huge warning flags were there.  This year we have the opposite with every sign pointing to a favorable base state of the NAM.  

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4 minutes ago, psuhoffman said:

It is very encouraging that all 3 major ensembles temporarily spike the AO as two TPV lobes merge but all 3 immediately give it the boot and tank the AO again within a couple days.  The best news is we are well into the point where the last few years there was ample evidence the look up top was going to be trouble.  Especially last year when huge warning flags were there.  This year we have the opposite with every sign pointing to a favorable base state of the NAM.  

Yea by this time last year it was pretty evident that we were in store for a pretty sucko winter, even by Mid Atlantic standards.

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37 minutes ago, poolz1 said:

If we can just get some energy to hang back a bit for a x-mas miracle......

A fair number of the 12z GEFS members show decent snowfall on xmas eve/xmas morning.  Hard to capture it all in a single panel because of timing differences, but you can sort of see it here.  EC6381C2-287C-49A8-BCD9-B7C820D11A16.thumb.png.ac755c4eff31fe875a42613d0ab562a9.png

BF1EFB6F-1C97-4747-9679-763B96ACEC9F.png

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5 minutes ago, JakkelWx said:

How it started vs how it's going

1020091992_ao.sprd2(5).thumb.gif.4e9f9024b5da29bb098b9960a1bd762e.gif

Ensemble Mean AO Outlooks

 

 

Today's forecast has a greater spread out in time,  although I doubt we achieve some of the upper member's forecasts.

May very well consolidate in a more narrow channel, more so negative versus + or neutral, in a few days. That has happened twice in the last 11 days. 

 

315726440_ao.sprd2(12).thumb.gif.ca3dc53f4a3e6a5db57ab1acad9ea5d1.gif

 

 

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5 minutes ago, osfan24 said:

What I wouldn't do for some snow on Christmas, especially a major storm. And this year would be the perfect year to be snowed in on Christmas.

A true blessing for the weather weenies, and for many others, after a year of difficulty and sadness for many.   

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The models have all been bouncing around some sort of system on the 24th/25th/26th. CMC probably the closest to what we'd want so far. Needs a stronger/better placed 50/50 low and more blocking, though. The high as shown would probably disappoint us in the same ways the high with yesterday's storm did.

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48 minutes ago, frd said:

Ying and Yang...... wonder what happens in the East between December 25 th and January 7 th 2021.

 

 

  

 

Awesome! Now tell me why that dude is sittin' up there with a frowning emoji as if the blue ball of awfulness wasn't set up there all last winter...lol (and maybe even the winter before) Spread the wealth! :lol:

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