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The Allsnow Blizzard of 2026


Rjay
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3 minutes ago, SnowGoose69 said:

Yeah but if we are 30 gusting 45-50 I don’t think it’ll be that high 

I think the winds will break up the dendrites and slightly temper accumulations but I don't think this is going to be a wet paste type of snow that clings to everything such that it will bring down trees and power lines.  Not going to be champagne powder either.

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Just now, Winterweatherlover said:

Anyone worried about rain should see how that rain/snow line crashes rapidly even as the low barely moves. This storm is very dynamic! 

This isn't a rain snow line storm. It's where's the phase and mid level low tracks/how soon do they close off. And so far they're all trending more favorable every run. 

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3 hours ago, SACRUS said:

 

2/21 00z Summary

Total QPF NYC / Total 10:1 Snow NYC

SREF:  1.5 / 14.1
NAM: 2.3 / 22.3
ICON: 1.8 / 16.7
RGEM: 1.0 / 9.2
GFS: 1.9 / 19.1
GFS AI AIGFS: 1.6 / 16
GGEM: 1.4 / 13.5
UKMET: 1.0 / 11

 

Updated with UKMET

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1 minute ago, SnoSki14 said:

I don't buy the lighter precip with an intensifying storm. That seems to be a big difference between the snowier models vs the less snowy ones

Ukie is always wonky for some reason with its precip output

In the January storm it kept having that snow hole over nyc

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Agreed.  We here can imagine the possibilities without risk of being ridiculed for all eternity like he would be if he called for 30" and we ended up with 4.
Upton's unprecedented High End / Low End disparity of 24-30" at one end and 0.5" at the other is off putting to me.  I don't think I've seen even an 8" forecast storm with a 0.5" low end.  Whatever is driving that would spook me from putting any huge numbers up too.  You call for 15" and you get 25", no one will remember.  You call for 25" and get 0.5" , no one will forget, ever.
A few important aspects to keep in mind:
- There is no human intervention in that dataset. The underlying NWS NDFD forecast is applied to the WPC super ensemble data and does adjust the statistical spectrum a bit, but this is done automatically.

- There may be time lagging affecting the low end members of the super ensemble, with various inputs possibly being earlier model cycles.

- The above being said, given the extreme top end of the spectrum which we can see with the GFS (and many GEFS members) and NAM, those top end 90th percentile amounts are physically plausible, and again, automatically derived (with a ratio applied I believe).

- There is certainly a good deal less spread now than earlier today, but you'll still have some ensemble members that have much lower QPF at this range (and some of these may be from earlier cycles, as noted above). For this reason, the 10th percentile low end amount undeniably seems ridiculous given the extreme top end amounts, but in this case, the 10th percentile is not completely unreasonable. As spread decreases, that will most certainly come up on subsequent runs.

Sent from my SM-S936U using Tapatalk

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10 minutes ago, jm1220 said:

That storm on the Long Beach boardwalk was the best winter storm experience I’ve ever had. Wind with intensity even though the heaviest was over NJ. Thunder snow on 12/30/00 second best. My mom passed away recently so I can’t stay at her house for this but my place is fine. 

So sorry about the loss of your mom.

WX/PT

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2 minutes ago, SnoSki14 said:

I don't buy the lighter precip with an intensifying storm. That seems to be a big difference between the snowier models vs the less snowy ones

Yea it’s not like the lower qpf models are showing huge totals south but less here they aren’t showing 2 inch liquid anywhere which is hard to buy in this setup.

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3 hours ago, SACRUS said:

 

2/21 00z Summary

Total QPF NYC / Total 10:1 Snow NYC

SREF:  1.5 / 14.1
NAM: 2.3 / 22.3
ICON: 1.8 / 16.7
RGEM: 1.0 / 9.2
GFS: 1.9 / 19.1
GFS AI AIGFS: 1.6 / 16
GGEM: 1.4 / 13.5
UKMET: 1.0 / 11
GEFS: 2.1 / 20.5


Updated with the GEFS mean QPF / snow 10:1

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