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Discussion-OBS slippery plowable moderate to high impact snowstorm with many delays near I95 and inland btwn 10AM Sun 1/19-4AM Mon Jan 20. R/S line uncertain near and east of I95 - parts of LI may be limited snowfall of around 1"?


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12 minutes ago, EWR757 said:

The 12Z GFS has ~6" of snow for me in Somerset County, NJ beginning Sunday afternoon, about 0.49" water equiv.  The cold air advection begins Saturday evening and as of Sunday morning and beyond the atmosphere is below 0 C.   

I think elevation may play a significant role with precipitation type and accumulation, the GFS just 25 miles east at KEWR is above freezing in the lowest levels most of the event.

I don’t think elevation is a big factor here at all. 

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32 minutes ago, EWR757 said:

The 12Z GFS has ~6" of snow for me in Somerset County, NJ beginning Sunday afternoon, about 0.49" water equiv.  The cold air advection begins Saturday evening and as of Sunday morning and beyond the atmosphere is below 0 C.   

I think elevation may play a significant role with precipitation type and accumulation, the GFS just 25 miles east at KEWR is above freezing in the lowest levels most of the event.

?

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Said f*** it and made a map. For the most part, discounting RGEM/GGEM. I believe it is too strong/amped and will cave to the SE. If it doesn't, a lot of us are going to be unhappy. Pretty confident on a rain/mix at the start for the NJ Coastal Plain (more so here) and some for E Long Island too. Otherwise, I went with a blend of GFS, Ukie, and Euro. Think it comes a bit farther west and lightly stronger/juicer than the Ukie/Euro, but not to GFS/GEM amounts. Overall think it's a good 3 - 4 - 5 inch event for most of us, except for extreme south/east spots. Given the speed of this thing, I think the upper limit is 7, maybe 8 inches somewhere just NW of 287. Aside from the coast, ratios should be increasing as the storm progresses, highest farther NW, up to 15:1.

Feel free to roast, criticize, wring me by the neck, etc. 

Snow Map 1.19.25 - TW.PNG

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8 minutes ago, Allsnow said:

Snowy eps run. More chances coming after Sunday 

I'm going to go out on a limb and say that if we don't cash in with the storm towards the end of next week, our next chance won't come until mid February.

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1 hour ago, Rjay said:

 The differences between the cmc and euro/ukie are large. Gfs would be a compromise but it's a trash model. 

I lean way towards the euro/ukie combo than the Canadian combo but a blend of them is usually the way to go when there's such a split. It does seem like the cmc is an outlier but I don't think it can be discounted entirely either.

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/O.NEW.KOKX.WS.A.0001.250119T1700Z-250120T0900Z/

Northern Fairfield-Northern New Haven-Northern Middlesex-Western

Passaic-Eastern Passaic-Western Bergen-Eastern Bergen-Western

Essex-Western Union-Orange-Putnam-Rockland-Northern Westchester-

308 PM EST Fri Jan 17 2025

 

...WINTER STORM WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE SUNDAY NIGHT...

 

* WHAT...Heavy snow possible. Total snow accumulations between 5 and 8 inches possible.

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