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January 2 - 3 Winter Storm Potential


NEG NAO

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NAM is about where you want it, its undoubtedly going to be way more amped than the GFS/Euro will be at this range so you at least know there will be less of a primary influence or should be on both of those models.

 

the weaker primary is so important and getting that low to develop and bomb out from hatteras would be ideal. I guess 0z I going to be a nail biter tonight. maybe be as exciting as the eagles/cowboys game :lmao:

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This run still looks disjointed and the confluent shortwave on the south side of the PV is still lifting out faster than the prior runs. 

 

Nothing arguing, to me, that the primary low won't drive just as far north as the prior NAM run which when extrapolated onto the DGEX scheme was quite warm. 

 

That said, the changes in many regards are quite significant on the NAM so far (shocker there, I know). Speaks to the uncertainty of the setup as a whole. 

each model run has been more unfavorable than the predecessor....models seem to be figuring out what is going on.....is next....

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each model run has been more unfavorable than the predecessor....models seem to be figuring out what is going on.....is next....

 

This latest NAM run was more favorable. With the important shortwave stuck in a split flow near Yukon and Alaska where there's less data available than can fit on a floppy disk...I'm not grabbing the towel just yet.

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I don't think anyone has really thrown in the towel here yet. Let's not lie to ourselves....we will still be checking the model runs and the forum to see if there are any crazy changes to the outcome. Yes, I think our chances for anything over a few inches are about 1 in 10, but it is still possible. Stranger things have happened 4 days out from a storm....we've gone from a projected 0 inches to a foot and we've gone from 25 inches to 2. Let's see

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This latest NAM run was more favorable. With the important shortwave stuck in a split flow near Yukon and Alaska where there's less data available than can fit on a floppy disk...I'm not grabbing the towel just yet.

We still got two & a half days of model watching before you throw in the towel.

 

:snowwindow:

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This latest NAM run was more favorable. With the important shortwave stuck in a split flow near Yukon and Alaska where there's less data available than can fit on a floppy disk...I'm not grabbing the towel just yet.

said this earlier, data in Canada Is pretty damn sparse. we've seen a model snafu due to that before the boxing day blizzard. ( not saying it will be like that just making comparison john )

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H5 looks much better this nam run. 850 nb low still a major concern

it still doesnt seem to be digging enough....even on the real good looking runs the trough slides east instead of ramping/wrapping up north...

 

the confluence doesnt look great.

 

The vortex/quasi 50/50 needs to be further SE

 

Granted this doesnt look horrible - the ridge out west looks to be in a good spot

nam_namer_084_500_vort_ht.gif

 

but it needs help 

 

Maybe if the vortex had a few more closed contours?

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One significant positive that few have pointed out...we have essentially stopped the trend of strengthening the midwest primary. That is a huge step in the right direction. Per H5, GFS is not developing the SLP far enough south. For sure, all of the models are having some difficulty with the energy transfer and the incoming vort. Probably still not worth throwing in the towel for NYC. For the DC-PHL corridor, I think it's time to throw the towel in. This could still be one of these situations where there is a very tight gradient and those furthest east could get hit pretty hard. I like the idea of eastern half of LI getting a good accumulation.

 

yep still rather sloppy…looks similar to 18z….

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One significant positive that few have pointed out...we have essentially stopped the trend of strengthening the midwest primary. That is a huge step in the right direction. Per H5, GFS is not developing the SLP far enough south. For sure, all of the models are having some difficulty with the energy transfer and the incoming vort. Probably still not worth throwing in the towel for NYC. For the DC-PHL corridor, I think it's time to throw the towel in. This could still be one of these situations where there is a very tight gradient and those furthest east could get hit pretty hard. I like the idea of eastern half of LI getting a good accumulation. 

A lighter version of Nemo from 2/8/2013 ?  Does NYC dust it off with a broom, while Suffolk snowblows and gets snowbanks and mall piles ?  While Philly and DC get brown lawns.  If it doesn't snow stick season is 4-5 months of ugly hell outside when cloudy.  Tolerable looking when full sun w/ blue sky.  It is amazing the beauty outside during leaf out in late April early May. Can not come fast enough...  Getting the sun above 35 degree elevation at noon is very start of the death of winter in my book. 40 degrees well on the way, and the look and quality of the lighting and shadows is huge from late December.  I think the huge telephone pole lost about 3/4 of an inch of shadow since last week.  It is starting :)  Real sun angle posts are 8-10 weeks away already.

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One significant positive that few have pointed out...we have essentially stopped the trend of strengthening the midwest primary. That is a huge step in the right direction. Per H5, GFS is not developing the SLP far enough south. For sure, all of the models are having some difficulty with the energy transfer and the incoming vort. Probably still not worth throwing in the towel for NYC. For the DC-PHL corridor, I think it's time to throw the towel in. This could still be one of these situations where there is a very tight gradient and those furthest east could get hit pretty hard. I like the idea of eastern half of LI getting a good accumulation.

Could be very much like the 2-8 storm last winter (I refuse to call it Nemo). The storm really started over NYC and got worse east and NE of there. Not to say the accumulations will be the same, but it would be a quick ramp up where the mid level centers on the new coastal storm get organized. Miller B's almost never happen for DC and for Philly are sometimes significantly more rare than for here-2/8 last year gave most of them quite little. Hopefully the models are going to start reversing on the north trend with the H500 energy and will transfer at least soon enough for us to get a good swipe.

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