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March 6-8th Ocean Storm Discussion Part II


free_man

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If the GFS caves substantially to the euro that would be a horrible fail for a D3 solution. The gfs even figured sandy out by 72 hours.

 

Yeah no way around it, Euro or GFS is going down hard. 

 

I think every run has been drastically different over the Midwest. At one point the NAM pounded Flint.

 

That's the rub.  The NAM to me is heading towards the GFS over New England (to some degree) but it doesn't matter if the developing ULL is in a different spot too.  That's what usually happens, the GFS will do very well in one aspedt but fumble the ball elsewhere to compensate.  That's how the Euro so often steals the show, it may be a little bit off everywhere but not usually terrible in any single feature respect.

 

The stumbling block IMO is the block, and what goes on over us.

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Well NAM caved to the GFS/UK idea of the old spin rotating over New England.  It had been lock step with the Euro up until the 6z last night as was the RGEM.  Both broke from the Euro and tugged the old system through New England.  The 12z NAM carries that idea.  DT was up in arms over this feature last night as a phantom, but it's legit.

 

Not as extreme as the GFS by any means, but it's there, and will play a role.  Note compared to the 0z NAM that agreed with the Euro the other center is also shifted considerably further ENE out of the way.  (SE of NS)

 

nam_namer_036_500_vort_ht.gif

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It boggles my mind the ensembles have a virtual bliz 72 hours out.

 

Yeah, other than perhaps a 25 mi margin for error the 06z GFS stayed course ... which is really interesting because 10 out of the 12 00z GFS ensemble members were nearly identical to the operational run.  

 
Seeing so many GFS members on board ... it's not like the operational version is a rogue solution, when the majority of its cousins are on the same page. 

What all that means is that there is either something more systemically wrong with the entire genome (for lack of better word) of the GFS construct, or the Euro will have to eventually concede.  

 
Fwiw, the 12Z NAM's might be a trend in that direction.. 
 
What a wacky year of modeling - each model gets a chance at glory?  ...Before returning to suckdom ??  We really need this storm to work out in the GFS' favor so that it can be an even money winter.     
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NAM looks like a scraper for the most part...gets some solid qpf into eastern SNE, but the real brunt of the dynamics remain on the Cape or offshore. It would be a nice pasting for the Cap eif it wasn't so warm.

 

The trend is more important here -   particularly in that 54-84 range.   That was a pretty substantial leap NW at 500mb; interesting that the surface solution was only slightly NW, but another run with that much 500mb repositioning and that sfc resolution would concede and then you got more impact bodily into eastern zones.   It's that close...  

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The trend is more important here -   particularly in that 54-84 range.   That was a pretty substantial leap NW at 500mb; interesting that the surface solution was only slightly NW, but another run with that much 500mb repositioning and that sfc resolution would concede and then you got more impact bodily into eastern zones.   It's that close...  

 

 

Yeah the NAM is close to something a lot bigger...but I really couldn't care less what the NAM shows at this point. Maybe it will actually figure out a system outside of 48 hours at some point, but until it does, there's little reason to take it seriously.

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I think it makes some sense that coming up against the block, the closed 5H low turns quite negative in orientation and eventually gets some snow into SNE. Probably a weaker low might just get squished under and slink OTS east southeast off HAT as earlier runs showed. We'll have to see how far southeast it dive bombs before beginning it's pivot toward negativity.

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Yeah the NAM is close to something a lot bigger...but I really couldn't care less what the NAM shows at this point. Maybe it will actually figure out a system outside of 48 hours at some point, but until it does, there's little reason to take it seriously.

 

 

LOL,  word!   

 

...I guess the point is, if it were trending the other direction, that would be less encouraging.    But yeah, as is the model is not a very good synoptic tool for anything beyond about 20 minutes it seems.  lol

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