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January 2012 Storm Threats and Discussion


PhineasC

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lol

Doesn't make me anymore right or wrong.

But I do think there are things to monitor finally starting with Monday. I only gave a heads up about Monday yesterday because I didn't trust the suppressed solutions and since the air was marginally cold enough it could produce -SN.

Keep up the great work, HM. I'm just messing with ya :wub:

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I think the issue with the Jan 13-14 setup has more to do with the southern stream low that the GFS wants to bring out and phase while the ECMWF wants to leave in the E PAC (exact opposite of their 12z runs yesterday). The temporary heights lowered in E Canada will actually simulate a 50-50 low that is moving north as a s/w is amplifying.

The cold air issue is more for Monday than the next one. I didn't check closely yet (outside of 2m and h85), but is the 12z ECMWF snow in Maryland on Mon AM?

I think the euro is interesting beyond day 10 and is the best look that it has had this winter though I don't expect it to look the same on the next run. More cold shots give us more potential though we still are going to need really exact timing.

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Keep up the great work, HM. I'm just messing with ya :wub:

I know. Thanks...

I think the euro is interesting beyond day 10 and is the best look that it has had this winter though I don't expect it to look the same on the next run. More cold shots give us more potential though we still are going to need really exact timing.

Agreed 100%. By the way, I enjoyed the article.

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Thanks, Most ot the GFS ensembles are more in its corner than the euros concerning the 168hr threat. It will be interesting to see what the euro ensembles do.

Agreed about the GFS ensembles. While there were a handful of members who backed the southern low west like the euro, most agreed with the op.

The 12z extended UKMET also brings it out but more sluggishly and dampened:

http://www.meteo.psu.edu/~gadomski/UKHEMI_12z/ukloop.html

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GFS in a week.

:popcorn:

Also, the EC showing a fast flip to a neg NAO on day 7. Haven't I read on here that that sometimes is a period of potential snow storms, just as the flip is taking place. Or is this just wishful remembering on my part?

Re the GFS. I think maybe we can squeeze out a smaller event. The setup is not the best. Still PAC jet and air mass with nothing to slow the flow except some quasi 50-50 low so the features have to interact properly. We still need timing. In no way am I punting the potential to get something but I am more interested in the period after we get the -EPO ridge and we get real air entering the Conus.

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GFS in a week.

:popcorn:

Also, the EC showing a fast flip to a neg NAO on day 7. Haven't I read on here that that sometimes is a period of potential snow storms, just as the flip is taking place. Or is this just wishful remembering on my part?

I think it is usually when the NAO is rebounding not tanking. But I may be wrong.

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For the first time this winter,the GFS is finally showing a true -NAO block

at 336-384 hours

We won't need one next weekend (slightly after if the ECMWF is right) if the PV is properly in place to mimic what a 50-50 low / -NAO would do.

The southern s/w coming out is the first big obstacle. If that comes eastward, then suddenly we aren't dealing with the ECMWF solution / Miller B type system Jan 13-14.

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We won't need one next weekend (slightly after if the ECMWF is right) if the PV is properly in place to mimic what a 50-50 low / -NAO would do.

The southern s/w coming out is the first big obstacle. If that comes eastward, then suddenly we aren't dealing with the ECMWF solution / Miller B type system Jan 13-14.

what are the chances?....as Wes mentioned there is no blocking, so the vortex is flying northeast.....It's cool that we have a chance at something....I'm just hoping for a minor event

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what are the chances?....as Wes mentioned there is no blocking, so the vortex is flying northeast.....It's cool that we have a chance at something....I'm just hoping for a minor event

Without the "real setup" (classic -NAO pattern) I would make the chances lower than normal. First of all, I am not even sure the southern s/w kicks out yet or how long it will take. But yes, the PV will be quickly moving; however, the southward displacement is all thanks to the PNA ridge and the southern low it phases with. If either of these things go wrong and the PV isn't displaced...then the game is over.

So yeah this has a lot of things that have to fall in line, but this is better than the situation we were in earlier.

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He winterwxlover,how much is ""slightly.wet""???

Slight. 0.1 to 0.25 range. But I don't think it's too common to see "really wet" on the ensemble mean from a week out. Some of our more knowledgeable folks might weigh in on the validity of that last statement.

That's the good news. The bad, to me, would be that the wet members are warmer and "wester" and the cold members are drier. The mix of the two is what is making the mean look halfway decent. The other bit of good news, IMO, is that quite a few show a system coming out of the southeast, and I think that's always worth watching.

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Re the GFS. I think maybe we can squeeze out a smaller event. The setup is not the best. Still PAC jet and air mass with nothing to slow the flow except some quasi 50-50 low so the features have to interact properly. We still need timing. In no way am I punting the potential to get something but I am more interested in the period after we get the -EPO ridge and we get real air entering the Conus.

Yeah, not really thinking anything big, or, really much of anything. I hope you're right about the following time frame. The EC look at 12z was really starting to pick up at about day 7.

This warmth hasn't really bothered me, until this time. Tuesday, with good cold and a little snow, some interest in the medium range in the models, got me thinking that we had climbed a step or two, but these two warm days have left me a little down about things. It is still fairly early though, so who knows.

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