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Thanksgiving Week Nor'easter Discussion


Zelocita Weather

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Quite possible. It's not as dry as the op but it did shift east.

It looks like there will be a few wet, inland lows and several suppressed, slower, dual lows in the individuals.  Big spread continues.  As has been said for days, with multiple s/w's in the polar jet, the models will have lots of trouble pinpointing which s/w to key on.

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Looks like out sea is a growing possibility

Funny that you say that.  Several people on here (including myself) have favored that outcome for several days.  And yet I have been, in my mind, starting to hedge a little back towards an inland solution since last night.  Among the operationals, the GFS is on its own right now.  Although the intra model ensemble spread easily includes it. 

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remember a couple weeks ago when the Euro caved to the GFS ?

No comparison. You had all the ensembles OTS then, the GGEM OTS then. This time the Euro has the support of its ensembles, it has the GGEM and up until 12z today, even the GEFS ensembles were way west. The GFS is always the first one to the party, the first one to leave and the last one to come back.

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remember a couple weeks ago when the Euro caved to the GFS ?

I do, and I think it could happen again, then again, it's one of a number of models that would have to do so. I'm not sure that happens this time. While I was favoring the OTS solution, I'm now on the fence thinking this could go either way but leaning slightly now toward the amped solution/s. No confidence whatsoever now.

WX/PT

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No comparison. You had all the ensembles OTS then, the GGEM OTS then. This time the Euro has the support of its ensembles, it has the GGEM and up until 12z today, even the GEFS ensembles were way west. The GFS is always the first one to the party, the first one to leave and the last one to come back.

 

so your forecast is for 2-3 inches of rain and temps 50-60F

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No comparison. You had all the ensembles OTS then, the GGEM OTS then. This time the Euro has the support of its ensembles, it has the GGEM and up until 12z today, even the GEFS ensembles were way west. The GFS is always the first one to the party, the first one to leave and the last one to come back.

The Euro has done this on occasion too, let's be fair.

WX/PT

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The GFS is probably wrong this time, we have to remember even though it beat the Euro frequently last winter it was largely because we still had a La Nina feel to the pattern so its crushing northern stream overbearing often ended up playing right into the way things fell, with all the southern stream action we're seeing so far the last few weeks I'd be cautious about using the GFS this winter if it differs from other models inside Day 5-6.

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Looking at it id think the best chance for the NYC metro would be if the southern stream system slows down even more/ejects later and that kicker shortwave is a bit faster. as per the GFS, if anything is going to "catch" the southern stream it would be that second s/w.... A least if I'm reading this right

That's just if the GFS or a GFS like solution were to verify at least

 I agree with this. This is a newbie's perspective but the 12z GFS sped up the northern stream sw and slowed down the southern shortwave and it allowed high pressure to build in the NE. If there is any chance of snow in this case, then it would be because the second low slowed down enough for cold to build in into the Northeast. If the second low is slow enough, it would create enough separation and therefore more ridging for it to go up the coast into that new high pressure. Although with the other models including the Euro looking much different this might not matter. The GFS definitely looks like an outlier. Anyways we need the rain here desperately because its been so dry. Something to keep in mind for future runs.

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