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December 2021 Medium/Long Range Discussion Thread


North Balti Zen
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11 minutes ago, BristowWx said:

If it wasn’t for the Atl I bet we’d have a pig SER.  Small victories I guess 

Yes the advertised -NAO does flatten the SE ridge. You can notice the flatter height lines and weaker +height anomalies over the east as we move towards the 20th on the means. Not the ideal look for our area, but sets up a possible gradient pattern, and with cold lurking in west-central Canada and some decent timing, a wintry storm isn't out of the question by the end of the month.

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32 minutes ago, CAPE said:

-PNA too ofc. Need that Pac ridge to shift east some, or the favorable Atlantic may mostly be wasted.

If the NAO ridge continues to retrograde west something will eventually cut underneath into the east and flip the pattern. That epo NAO combo is the kind of pattern that can lead to coast to coast cold. It’s the rare time we ”could” survive a -pna. 

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