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February Winter Storm Prospects


WeatherX

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I believe this will eventually belly under and exit in the NE . I believe in the PNA

and dont think this runs to the lakes . Our problem this year has not been storms running to the lakes We`ve had several benchmark

storms this year that were just devoid of cold air ( more my concern , than a run to the lakes ) .If Jan storms were`t running over and over again to the lakes with a pos NAO and a weak PNA im gona bet the ridge axis winds up in the same place for this . And enough troughness shows up by weeks end to bring it under .

You need something to stop the low from cutting (a blocking high, 50-50 low, high heights over Greenland, etc). A +PNA alone doesn't do it, esp. if it's far west. If it's amplified it will cut SOMEWHERE, but if it's in the right spot it cuts just offshore and it's called a Nor'easter :P

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The ridge amplification out west is as early as day 3 on the euro. People need to stop worrying about this being a 10+ day fantasy. Also EURO has the low progress eastward under the confluence and provides an overruning setup. Nothing major. Strong ridge out west also continues and nice low dropping down out of Canada, which should bring the cold.

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I am a fan of all manner of anomalous weather (except extreme cold, bc that sucks), so if we see a major snowstorm after one of the longest periods of above-32 temps in NYC history for late Jan/early Feb, that would be something.

It would be interesting to see how plants around here respond, as small trees and bushes have begun to bloom in the city.

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You need something to stop the low from cutting (a blocking high, 50-50 low, high heights over Greenland, etc). A +PNA alone doesn't do it, esp. if it's far west. If it's amplified it will cut SOMEWHERE, but if it's in the right spot it cuts just offshore and it's called a Nor'easter :P

Gotta make up our minds , is the pattern still progressive ? The PNA still migrates so this doesnt get pinched off

there should be enough confluence IMO not to run to the lakes

The Euro supports a nuetral to neg NAO in this timeframe . some say its not in the perfect spot

and its probably not , but should be enough downstream progression to allow this not to cut .

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The weenieshave destroyed this thread the last few pages. Grow up.

The 12z euro not holding back the shortwave should be a red flag. It's going against it's own bias of holding back energy. Not sure what to make of it, but something has to give. GFS or euro.

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It would be quite rare for the Euro to give to the GFS. 90% of the time it is the other way around.

The weenieshave destroyed this thread the last few pages. Grow up.

The 12z euro not holding back the shortwave should be a red flag. It's going against it's own bias of holding back energy. Not sure what to make of it, but something has to give. GFS or euro.

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The weenieshave destroyed this thread the last few pages. Grow up.

The 12z euro not holding back the shortwave should be a red flag. It's going against it's own bias of holding back energy. Not sure what to make of it, but something has to give. GFS or euro.

yea very good point its NOT holding back the energy but the gfs and euro very well could have the wrong idea right now. something just doesnt seem right with some of these outcomes as the models roll out on new data these past few days. LOTS of inconsistency that were not even close to ironing out.

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The weenieshave destroyed this thread the last few pages. Grow up.

The 12z euro not holding back the shortwave should be a red flag. It's going against it's own bias of holding back energy. Not sure what to make of it, but something has to give. GFS or euro.

Euro has the storm but it phases too late, high pressure is too far northeast into Canada and the system is too warm overall.

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True, but the Euro does have the highest verification scores of any of the models for a reason.

You are right it does but every model vs 1 model has failed this year. it has to work out 1 of theses times hopefully this turns out to be it. Also looks as if phase 7 of the MJO does not take place till after the threat now. Phase 6 is not the worst but it is not the best and I guess could get the job done. Should be an interesting week

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Euro differs from gfs next week. The Euro has a nice ridge out west and the core of the trough invades the NE US accompanied by cold weather. The GFS was much flatter out west and more zonal. This allows the gfs to gather some moisture in the southern US and as soon as the ridge pumped a bit out west the trough orientation becomes favorable for the LP to take aim on the NE US. The hgts rise ahead of the lp and the trough takes on a more negative tilt. The euro solution begins to flatten a bit in the long run, but the look at H5 has many differences. The EURO would be more dependant on a strong northern stream shortwave to drop into the trough and in response cause the hgts to rise along the coast to get something going.

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Can explain furthur since no one has responded to your comments?

Rossi

There is a tight thermal gradient with a high to the north and upper level system to the south and west inducing SW flow aloft, no guarantee it would not be sleet or freezing rain possibly but with a reinforcing vort dropping out of Canada with additional cold air there is potential for something in that range.

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I wasn't siding with the euro or gfs.. Quite frankly, both have things going for its own solution.

The seasonal trend has been for the sw cutoffs which would argue for the gfs sake.

The euro not holding back energy and kicking it out faster goes against its own bias and is a Red flag to other guidance.

At this point, toss a coin.

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looks like we "may" get some consistency tonight? we'll see but this upcoming pattern for the next two weeks is exciting and can deliver something big

It may help somewhat, but I don't know if we'll get great agreement on anything til all the crucial disturbances come ashore in the west. at this point there remains a number of possibilities to what could occur, we could see anything from a total rain event to nothing to a crippling blizzard depending on how that system kicks out of the Plains.

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I wasn't siding with the euro or gfs.. Quite frankly, both have things going for its own solution.

The seasonal trend has been for the sw cutoffs which would argue for the gfs sake.

The euro not holding back energy and kicking it out faster goes against its own bias and is a Red flag to other guidance.

At this point, toss a coin.

The GFS solution is what makes me uneasy about this but the euro red flag well that right there complicates this.

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It may help somewhat, but I don't know if we'll get great agreement on anything til all the crucial disturbances come ashore in the west. at this point there remains a number of possibilities to what could occur, we could see anything from a total rain event to nothing to a crippling blizzard depending on how that system kicks out of the Plains.

yea when all the players are on the field we'll start to get some decent consistency then.....or hope

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02/23-02/25/08 showing up all over the CIPS analogs...this is combining all the various regions which is what you sort of have to do to make use of them. Interestingly enough the 2/26/08 storm which tracked too far NW for us but gave a big snow event to W and C NY formed out of a semi-similar setup but with less confluence in SE Canada and a more +NAO.

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