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Jester January


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4 hours ago, ORH_wxman said:

Yeah the NAO itself is stochastic enough and variable enough in it's own episodes that it's hard to generalize. You can have a very strong block but if you don't have a very strong TPV pinned under it, then you aren't going to get as much suppression. So the block isn't the only variable in that case....the strength and size of the TPV plays a role. REplace a monster TPV with a much smaller TPV lobe pinned underneath, and now maybe the same block is perfect for Boston snowstorm instead of DC.

I do agree with @Typhoon Tip that we probably shouldn't take too much beyind D6-7 seriously at the moment (not that we ever should, but especially in this case) because that TPV/NAO coupling behavior is definitely notoriously bad on guidance. You have spokes of energy rotating around and other piece of energy diving down in the northern stream all interacting with it and it can change quickly.....hence why sometimes we'll see a monster bomb running due north near the BM on one run near 1/10 while the next set of runs might have nothing within 500 miles of that spot.

 

Correct, and the NAO is kid of derivative in many cases of preceding/upstream things occurring too.  Not saying it's useless by any stretch, just saying it gets entirely too much credit for 'X will happen' and that's largely due to the aughts.  We're aligned there.

 

Yeah I'm with you both. When you get these little rotating SW's and a mess of things going on above 60N, especially on things that haven't really been robustly sampled.  Type of setup where it's incredibly fickle.

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15 minutes ago, Typhoon Tip said:

this will probably not resonate with anyone but ... you don't want this.  trust me.  you don't. 

Ooooo, can you please give us a classic Tip novella on how exactly you think this would play out, ground truth. Joking aside, I’d love to hear your version of what would occur.

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i'm wondering if there's a historical catalogue of actual model runs ? 

 i suspect if there ever is/were, this is among the very most extraordinary, if not the goat, virtual prognostic from an operational/purposeful geophysical processing.   

closed sub-500 dm mid level heights by a couple of contours s, of nyc latitude, as a result of 90 deg neg tilting ?   really that's a scenario where any hyperbole is can't be dismissed as merely such. 

okay, i get it but responsible thinking is that most of civility can't heat their homes without electricity - either direct use, or a peripheral to thermal generation.  i suspect most in here have alternate options but ... mm maybe try for some empathy or at least acknowledgement as to how one purports themself.   just a suggestion -

it's about all i'm going to say on this.  the model run has limited chance for being realized as the wholesale synoptic manifold of parametrics, in time,  strains too much credibility.  if we take 1/2 of the ghosted solutions earlier, and average them against this one...that's likely closer to the reality - which would be a major if so..so no loss there.

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