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January 2015 Pattern Discussion


CapturedNature

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I'm not sold on a real -NAO yet...that is a transient ridge that drops the index number for a few days.

 

Perhaps post-Jan 25th we get more of a real block setting up over Iceland and potentially into Greenland, but right now, the signal is weak.

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I'm not sold on a real -NAO yet...that is a transient ridge that drops the index number for a few days.

 

Perhaps post-Jan 25th we get more of a real block setting up over Iceland and potentially into Greenland, but right now, the signal is weak.

best part being there is a definite signal and its has gotten stronger which is a good sign, could be the 25th on but I think by the 23rd . but time will tell.

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Yea, I'd hold off on spiking the football in relation to any neg NAO/AO this sesaon.

no spiking but nice modeling confirmation of my thinking when others obviously thought no chance at all. Like I told Dan no kudos yet but we are getting better signals every day, somethings going to pop here for us. 

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no spiking but nice modeling confirmation of my thinking when others obviously thought no chance at all. Like I told Dan no kudos yet but we are getting better signals every day, somethings going to pop here for us. 

Well, I assumed a sarcastic tone because I was looking for some piece of evidence other than the SAI/SCE. I wasn't implying that it would never happen.....but needs to be a pretty convincing case for it the face of the overall tenor of this season.

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If the ensembles are right, the overall look is on the -AO side I think, but as far as the -NAO..I don't see it yet. However as Will said, there are signs of maybe something east based. There are still signs that some splitting may occur at 50mb, but I do not see anything close to concrete evidence yet.

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There are some very good signals going forward for you guys in SNE and eastern New England... you're coming into your climo snowiest time of the season where its easiest to get it to snow, there's definitely been an uptick in storminess progged in the long range on the models in the past couple days, there's great cold nearby in NNE and southern Quebec/Ontario, etc.

 

I know its not that easy, but you aren't going to be getting shut out forever so the odds are for something to work out favorably after we get through the next week.  I could definitely see a few fringe jobs up here (which would be completely fine, as its time to share the love) but I stand by thinking February will be a good month for you guys.  It may not be epic, but at this point, I'm sure a few 3-6" events would feel pretty epic.  Plus the chance for a 12-spot type storm.

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I was specifically referring to Dr Cohen's blog not the SAI. It appears to me anyways that the EPO isn't going anywhere, PNA will be our buddy, the SE ridge is getting booted, AO is going negative and transient NAOs happen.  All very important signs to a chance for snowstorms to evolve. I would highly favor Miller Bs over Miller As or a combination hybrid rather than a pure Miller A. Perhaps our best chances to get snow seem to be on our doorstop. We snow

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How about today's Euro Ensembles. Total weather porn D10-D15! 

 

 

The guidance has been looking better as we get closer to this which is a positive sign. The pattern back in early January got a bit worse as we got closer...it was still cold, but the PV became overbearing and the SE ridge got stronger as we approached verififcation time. Meat grinder.

 

 

This one looks to have some more legs to it in terms of storm chances.

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GEFS are good too, but the EC ensembles are more favorable with the east-based -NAO in the long range post-1/25. GEFS revert back to a solidly +NAO look.

 

The key is the more stretched look to the PV I think in Canada...it allows some room to operate...lack fo a SE ridge helps too of course in allowing for that southern extrension of lower heights.

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The trough axis is further west and stretched like Will said. Not that perfect circular look at has earlier this month. I thought that was the ensemble mean being smoothed out and s/w details couldn't be determined, but it was right. Sheared out garbage it was. If anything, having a trough axis like what today's 12z run has, sort of goes against the opposite of what we have seen. That's a pattern that brings cstl huggers too. Anyways, that's speculation at this point. Nobody wants a dry pattern.

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Are you sure?

I mean, we could see an abrupt shift. What sort of feature would be responsible for delaying the SAI implied pattern? I recall Cohen mention a persistent low pressure somewhere in the "BK seas" area last several weeks messing with development and persistence of a blocking pattern formation. Would love to see this feature weaken

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I mean, we could see an abrupt shift. What sort of feature would be responsible for delaying the SAI implied pattern? I recall Cohen mention a persistent low pressure somewhere in the "BK seas" area last several weeks messing with development and persistence of a blocking pattern formation. Would love to see this feature weaken

It seems to me that we have a decent shot starting in these next few weeks. If that fails, it may be time to fold.

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