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Minor snowfall sunday 12/14/25 1-4” possible


WeatherGeek2025
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2 minutes ago, RU848789 said:

Love the "New and Improved" NAM, lol, i.e., the RRFS, which will be replacing both NAMs sometime next year (supposedly).  

sn10_acc-imp.us_state_ne_s.png

Looking at the soundings, looks like a deep layer of saturation that should support decent snow growth. If we play everything right, maybe close to a warning event especially just east of my area. Port Jefferson to around Riverhead is usually good in these. 

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31 minutes ago, RU848789 said:

Love the "New and Improved" NAM, lol, i.e., the RRFS, which will be replacing both NAMs sometime next year (supposedly).  

sn10_acc-imp.us_state_ne_s.png

It’s been reliably the most robust of the guidance for this upcoming event. Really living up to its predecessor. 

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  • BxEngine changed the title to Minor snowfall sunday 12/14/25 1-4” possible
1 hour ago, jm1220 said:

Looking at the soundings, looks like a deep layer of saturation that should support decent snow growth. If we play everything right, maybe close to a warning event especially just east of my area. Port Jefferson to around Riverhead is usually good in these. 

On both NAMs, at least at the height of the storm for areas snowing decently, omega (lift) values are in the robust -10 to -15 ubar/sec in the saturated DGZ, so we should see good supersaturation occur and decent dendrite growth for ratios above 10:1.  It's why my guesstimate is for ~4" at my house vs. the 3.3" forecast by the NWS.  

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6 minutes ago, RU848789 said:

On both NAMs, at least at the height of the storm for areas snowing decently, omega (lift) values are in the robust -10 to -15 ubar/sec in the saturated DGZ, so we should see good supersaturation occur and decent dendrite growth for ratios above 10:1.  It's why my guesstimate is for ~4" at my house vs. the 3.3" forecast by the NWS.  

Here at the coast we’re starting at or slightly above freezing which is of course the thorn in most of our setups. It’ll cool quickly though. Hopefully the robust models win out, there could definitely be some good banding for a while that could drop an inch an hour or so. 

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6 minutes ago, North and West said:


The spacing, graphics, and grammar on this site raise the rush of epileptic seizures.


.

When I lived in Central PA we had numerous setups like this where snow just skipped over the middle third of the state because of downslope, and it always sucked. 

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18z Euro AI showing pretty similar trend to what we've seen all day from it. I think its the best model for this one. Just under 3" for my area, I think with good ratios we could easily get to the 3/3.5" range.

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