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Next week's major storm and beyond


OKpowdah

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Did you just see powderfreaks picture? I don't give a rats a** about NNE and their snow.. if it was November, then yea, great, get those guys off to a good start.. its wildcard weekend. I could care less if the ski slope bunnies are dissapointed with their precious ski season this year. All I care about is my back yard.

5 minutes until the KING initializes

You've sunk so low...

The 18Z GFS?

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I could possibly envision a brief pop in the PNA and destruction of teh SE ridge as the pattern gets set up around D10 with a relatively tranqiul period followed by a developing/better gradient pattern. Sort of a mesh of GFS and Euro ens.

That may mean we have to wait for storminess once the cold settles in. A -PNA regime like the Euro Ens may mean somewhat unimpressive cold (seasonable to just below) but something a bit more favorable for snow.

I could see that as well.

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usedtobe, on 03 January 2012 - 03:07 PM, said:

The is the 1st time this season that I've started to get interested in the pattern if the models are right in the re-amplfication of the pattern on day 10. I don't see any snow chances south of 40 before then but think sometime around the 14-16 jan period could be interesting if we get a big storm that tries to put some higher heights over greenland for a few days. The forecast pattern certainly looks a little better than it has and the polar vortex does appear to be weakening.

HM

There is no doubt about it that the major anomalies in place driving the +AO are reversing mid-month. The first warming in the stratosphere allowed for the Siberian warm anomaly to move into the North Pole (already happening). This feature displaces a PV to 45N/160E which goes on to change the N PAC.

The QBO, state of the AAM, solar state and tropical forcing are all switching now.

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Raleigh's line graphs of the major indices.

http://raleighwx.ame...linegraphs.html

Appears that the EC ensembles have a mean slight -NAO, slight -AO, slight/moderate -EPO, and a solidly -PNA in the long range.

That weak east based -NAO peaked around d9-10 on the EC ens I believe with the ridging breaking down after that through d15.
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Raleigh's line graphs of the major indices.

http://raleighwx.ame...linegraphs.html

Appears that the EC ensembles have a mean slight -NAO, slight -AO, slight/moderate -EPO, and a solidly -PNA in the long range.

The -NAO on the EC ensembles is that North Atlantic ridge that temporarily tries to get some high heights into southern Greenland and the southern Davis straight, but it moves out in the time frame after D10.

I would think the EPO would go even more negative on those graphs if we could see D11-15. But either way, clearly you can see the changes already happening inside of D11-15.

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The -NAO on the EC ensembles is that North Atlantic ridge that temporarily tries to get some high heights into southern Greenland and the southern Davis straight, but it moves out in the time frame after D10.

I would think the EPO would go even more negative on those graphs if we could see D11-15. But either way, clearly you can see the changes already happening inside of D11-15.

Does it still keep high anomalies over the Iceland area? It looks like it could be some type of weak east based -NAO.

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Yup, It does not matter until we are inside 96 hrs

I'd be shocked if anyone got significant snow out of that storm. The pattern stinks for it. It might give a few sloppy inches for far NW NE near powerderfreak mountains, but I do not see a huge wet snow bomb...we'd need that ULL to move south of the region in a more easterly fashion and it does not look like the pattern wants to support that...it wants to move more NNE on the east side of that trough in the lakes/midwest.

Its far enough out we could always pray for a miracle, but the longwave pattern looks pretty brutal.

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Weeklies caved a little. They have some ridging into parts of NRN AK and the North Pole, but cold anomalies in sw Canada give rise to weak ridging in the east. They did weaken those + anomalies by a good amount on week 3.

We're due for Kevin to tell us week 3 and week 4 are trash.
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Gotta hand it to Sam. He called for a warm start and talked 1993-94 type of pattern. It may happen but a month past his expected date. Still a damned good forecast from months lead time.

haha thanks! I still bungled the December forecast pretty horribly. But the stratospheric warming was nearly on schedule, and January is looking decent at the moment

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Weeklies caved a little. They have some ridging into parts of NRN AK and the North Pole, but cold anomalies in sw Canada give rise to weak ridging in the east. They did weaken those + anomalies by a good amount on week 3.

How are their 2m temps? The reason I ask 2m is because we often are maybe -6 at H85 but damned cold at the surface in gradient overrunning patterns. TYIA.

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