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Ending out December with a Potential Pattern Change


CoastalWx

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Ponder this: If we can pull off that 12/30 storm it's almost a dead ringer going forward to 1993-94 with the brief relaxation/cutter followed by massive reload and cold and snow. I'm not saying I expect this verbatim but it is kind of uncanny...

Didn't we have a bit of help from the remains of Pinatubo that winter? And wasn't that winter dead-on with 2013-4? I.e. polar vortex with raging +NAO?
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I recall talk on Cohen's blog about a quasi stationary LP (somewhere in Asia) that was mucking up the -NAO potential (about 3 weeks ago) is this still a current feature (if anyone knows what I am referencing)

Yeah in NW Asia. This is why you can't always run with some sort of index in October and treat it as gospel. It also is only meant to explain the AO and not NAO. I did think odds would favor a pretty good negative AO and maybe that happens alater tHis month, but it's clear it won't be as negative predicted by Eurasian snow cover.

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The gfs now clips eastern areas with a storm on the 1st as well. Seems like we are going to have chances.

Para has a nice cutter on the 3/4th.

Thats the risk with the pattern. Reminds me of last year a bit

I wish we could ban the word "pattern" from the board discourse.  I think it leads to lots of misconceptions.  People want to lump weather into a handful of recognizable and repetitive categories.  But that's just not how it works.

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From HM on Twit, take it with a large grain of salt considering that they've been terrible in weeks 3-4 this winter.

 

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New ECMWF weeklies are a blowtorch Jan 12-25. Merry xmas

I don't know if I'd call it a blowtorch, but it's an above normal look with a strengthening SE ridge and nothing to keep cold locked in.

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I wish we could ban the word "pattern" from the board discourse. I think it leads to lots of misconceptions. People want to lump weather into a handful of recognizable and repetitive categories. But that's just not how it works.

actually that is how it works when looking at a generalized overview of the world

If you are looking at your back yard of course a similar 5h setup can yield different results. Research had shown that teleconnections yield similar physical results. No argument

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From HM on Twit, take it with a large grain of salt considering that they've been terrible in weeks 3-4 this winter.

 

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New ECMWF weeklies are a blowtorch Jan 12-25. Merry xmas

I don't know if I'd call it a blowtorch, but it's an above normal look with a strengthening SE ridge and nothing to keep cold locked in.

Check out Mike Ventrice's feed ( I am not sure if I can re-post his maps).  Not so much a blow torch...RATHER a COAST-TO-COAST OPEN-HEARTH BLAST FURNACE!

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Check out Mike Ventrice's feed ( I am not sure if I can re-post his maps).  Not so much a blow torch...RATHER a COAST-TO-COAST OPEN-HEARTH BLAST FURNACE!

 

I mean anything is possible but I'm a little skeptical of those kind of anomalous positive departures showing up in W Central Canada in mid-January.  

Just sayin'.

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From HM on Twit, take it with a large grain of salt considering that they've been terrible in weeks 3-4 this winter.

 

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New ECMWF weeklies are a blowtorch Jan 12-25. Merry xmas

I don't know if I'd call it a blowtorch, but it's an above normal look with a strengthening SE ridge and nothing to keep cold locked in.

 

Well anyone with a brain will see that the end of the euro ensemble and then the forecast for the avg 850 temp 7 days later is the opposite. Something that drastic simply won't happen.

I'm not saying I buy it(and in fact don't), but we've certainly seen quick flips before and I don't think that's a valid reason to toss them. However, this

 

So the heights go from above to below to

Above In AK. Yeah ok. Classic weeklies. Meanwhile the week 1 and 2 forecasts have trended over 200 meters higher in AK compared to Monday's forecast. Good luck dry jumping those forecasts.

Makes sense. LR guidance now in pretty good agreement on a cold first third of January with a -EPO pattern and chances, I think by the 5th-10th or so we'll see where this pattern will take us, what it looks like going forward, and what the strat has done by that point and that should give us a decent idea of where we're heading for the rest of the month.

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