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Fall 2023 Medium/Long Range Discussion


Chicago Storm
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Haven't had much time to discuss it, but as hinted to in a response to a post from Josh post about two weeks ago, after Thanksgiving was a period to watch for wintry conditions...and that is indeed what we have seen unfold.

This wintry period is a product of a potent -NAO and Alaskan ridge pairing, which dislodged a PV lobe, sending it south and anchoring around the Hudson. Albeit brief, this is a fairly significant pattern shift than has been seen this new season thus far.

ecmwf-ensemble-avg-nhemi-z500_anom-1000000.thumb.png.718643814c5e43e3d83bbacf1b962e43.png

We have another significant pattern shift already in the process of unfolding. Will have more on that tomorrow...

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