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  On 12/29/2020 at 8:58 PM, ORH_wxman said:

Underdog that it will end up a big storm, but can't rule it out. Marginal airmass (though at least it appears better than 12/5 as modeled) and a lot of shortwaves in the flow don't allow for much margin.

 

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I was poking fun at Ray's definition of major, but what you said makes sense.

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  On 12/29/2020 at 9:59 PM, WinterWolf said:

Is this going to cause a “True Split” of the Polar Vortex?  Or is this just another situation where it takes some big jabs and then reconsolidates? 

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it is very very unlikely to reconsolidate it is taking massive hits. 

 

Sudden stratospheric warming is underway! Here's a selection of radiosonde ascents from Russia & Mongolia at 12Z today, which captured the warming in the mid-stratosphere. http://weather.uwyo.edu/upperair/sounding.html
 

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If the ECMWF is correct, we have good conditions for a SSW with downward impact! European blocking is the best precursor for a NAO- response (see https://doi.org/10.5194/wcd-1-373-2020 with and L. Papritz), and it's predicted for the first week of January! https://apps.ecmwf.int/webapps/opencharts/products/extended-regime-probabilities?forecast_from=latest
 

Fh13B0nG?format=png&name=small

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  On 12/29/2020 at 10:04 PM, WinterWolf said:

So this might be the real deal as far as a real split goes this time then...?  Hopefully if it does split, we get some of the affects on our side of the pole/globe also? 

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Yes it looks like it for real this now. Two weeks after a SSW peaks (in the Siberian cases, only)

 

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This information and model is from Met Michael Ventrice on Twitter. He is also doesn't have a weenie bias. He calls it how he sees it. 

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  On 12/29/2020 at 10:43 PM, ORH_wxman said:

He might have been issuing a forecast for the Davis Strait or northern Quebec. 

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Hey just wanted to let ya know I plan on moving to Worcester next fall. Depends on work of course, but the next 10 months will be solely working on that goal. Excited! You guys will never get rid of me then, sorry.

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  On 12/29/2020 at 10:08 PM, leo2000 said:

Yes it looks like it for real this now. Two weeks after a SSW peaks (in the Siberian cases, only)

 

Image

 

 

This information and model is from Met Michael Ventrice on Twitter. He is also doesn't have a weenie bias. He calls it how he sees it. 

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I think there is something to the big Ural/Barents Sea high and Aleutian low. That’s seems to really help get the displacement and/or split. Not sure it’s ever splits, but whatever. 
Anyways, from what I saw...very very unusual to have this in a Niña. We’ll see what happens. 

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