Runs like this and sometimes storms like this are often (but not always) products of patterns we'll have in place the next 2 weeks. If people are interested, below is a graphic showing the Euro AI model's ensemble of 50 runs for Central Park from this afternoon at 12Z made with small variations in model initial and boundary conditions in order to gauge the sensitivity of the model to these variations (this is done because the data inputs are always incomplete and imperfect, so there is always variance on those model inputs).
In this run one can see a huge amount of pink (cumulative snow above 10") after about 1/24, with the biggest jumps centered around 1/25-126 and 1/28-30, which one can see more easily in the "mean" figure at the bottom of the graphic. It's worth noting that 8 of those 50 runs show >20" for the 15-day period, while 35 of 50 show >6" cumulatively (with ~80-90% of that snow coming after 1/24), which is impressive, as there are usually a lot of runs that have no snow, bringing the mean down. All of this indicates the potential for significant snowfall around these dates, which also coincides with us seeing the operational versions of the major global models (Euro, CMC, GFS and now their AI counterparts, with the Euro AI being the best so the Euro AIFS ensembles, in this graphic is the best ensemble model), as one can see by the Euro AIFS snowfall graphic you posted for 1/25 (it was similar at 12Z and other models have been too, at times).
In addition, the Euro AIFS ensemble, below, showing the mean of the 50 runs is 10"+ is almost unheard of for a 15-day projection (a typical ensemble run might have 2-4" of snow for a 15-day period in January) and we're seeing that with the other ensemble means for the other models. And while having an extremely high ensemble snowfall mean is no guarantee that there will be a major snowstorm during that time (they are pretty rare and certainty simply doesn't exist in forecasting this far out), it is true that most of the major to historic snowstorms of the past 20 or so years were preceded by somewhat similar patterns as now that were showing anomalously high snowfall projections.
It's worth perusing the linked page from AmericanWx with way more on this stuff (including graphics showing most of the model ensemble mean snowfalls for the next 15 days are 8-12") and looking at the post by brooklynwx, a great young meteorologist (3rd post on that page), where he says: "This is probably the best shot at repeating a Feb 2021 type stretch in quite some time. hopefully we can cash in… we have high end overrunning potential around the 25th and then a more prototypical big coastal chance (on 1/28) as the -NAO decays and the PNA rises." FYI, I got 35" of snow in Feb-21.
https://www.americanwx.com/bb/topic/62470-january-2026-obs-and-discussion/page/60/
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