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January Medium/Long Range: A snowy January ahead?


mappy
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  On 1/13/2025 at 4:21 PM, Heisy said:

CMC and icon are still in the same camp of dragging the shortwave really far W and slower. Not saying they’re wrong, but idk. This is way different for Day 5-6.

The GFS is more aligned with the EPS and Euro progression fwiw

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CMC looks like it may be good for middle of next week

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  On 1/13/2025 at 4:20 PM, psuhoffman said:
And before anyone screams about "Kuchera" I checked...the ratios are realistic.  Actually slightly less than 10-1 along 95 and about 13-1 in the higher elevation areas further from the rain/snow line.  This seems very reasonable.  

CMC progression is still completely different. Sometimes it does stuff like this outside day 5-6, but man that’s pretty stark difference. CMC probably leads to a much larger event if that energy comes E after the N/S races ahead

It would be a few days after the 20th though


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  On 1/13/2025 at 4:27 PM, Heisy said:


CMC progression is still completely different. Sometimes it does stuff like this outside day 5-6, but man that’s pretty stark difference. CMC probably leads to a much larger event if that energy comes E after the N/S races ahead

It would be a few days after the 20th though


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Yesterday this tendency (and duality of options) showed up in the EPS snow plots.  There were smaller hits around Jan 20 and larger ones around the 21-22 for the members that had a slower more amplified solution with that wave.  

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  On 1/13/2025 at 4:28 PM, Shad said:

snowing new orleans, florida panhandle to NC at 207, lol

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There have been very few permutations among all the ensembles and op runs that have a hit from both the 20th and 22nd threats...They are linked.  If more energy comes out with the wave on the 20th the 22nd is likely weaker and south.  If more energy holds back at the tail of the trough, the 22nd becomes a more amplified wave and a threat but the 20th is likely nothing.   It's likely one or the other.  There is a narrow thread the needle balance of energy that could lead to two hits but its not the most likely outcome.  

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