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On the doorstep of winter....it's coming! Pattern with banter


weathafella

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But noticably deeper trough and vortmax now deep into the south. Yesterday this looked like a relatively weak wave. Today it looks pretty potent. The recent trend is toward a much more significant east coast storm on the GFS. Mostly rain for now in terms of actual weather impact, but if the modeling continues the amplifying trend, it's going to have a tendency to redevelop a surface low further southeast after the initial Ohio Valley low weakens. That could turn things much more wintry, esp if there ends up being less ridging ahead of the trough.

6z gfs was stronger than the 12z.

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6z gfs was stronger than the 12z.

Well stronger in terms of the eventual cyclogenesis, yes... Slightly more potent vortmax, and a mid-level flow structure that led to an earlier tilting of the trough. But 12z is nearly as potent and clearly further south. In fact the vortmax gets almost to the Gulf coast at 162hr!

The exact evolution will change dozens of times in the coming days. But the trend over the past 4 runs of the GFS is significant. If somebody has the ability to animate the runs, it's pretty stark. The amplitude of the longwave trough that develops has gotten larger and sharper. This introduces the possibility of a strong low center as opposed to the previous idea of a relatively weak, moisture laden wave. If we get lucky with the evolution and timing, a coastal low is not impossible. The 12z GFS never develops a good mid-level circulation, unlike the previous run, which had more precipication back into the cold side.

I think this setup favors interior areas (noting the downstream flow), esp NNE, but with large changes run to run, it seems the possible range of options is wide.

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That GFS run beyond 240 hours will have NZucker tossing and turning in his sleep tonight.

LOL, I think we'll have a gradient issue nearby as the PAC jet tries to battle back, but tough to say what impact it has here specifically. Hopefully P1 and 2 do their magic and pop a ridge out west like what's hinted at.

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Well stronger in terms of the eventual cyclogenesis, yes... Slightly more potent vortmax, and a mid-level flow structure that led to an earlier tilting of the trough. But 12z is nearly as potent and clearly further south. In fact the vortmax gets almost to the Gulf coast at 162hr!

The exact evolution will change dozens of times in the coming days. But the trend over the past 4 runs of the GFS is significant. If somebody has the ability to animate the runs, it's pretty stark. The amplitude of the longwave trough that develops has gotten larger and sharper. This introduces the possibility of a strong low center as opposed to the previous idea of a relatively weak, moisture laden wave. If we get lucky with the evolution and timing, a coastal low is not impossible. The 12z GFS never develops a good mid-level circulation, unlike the previous run, which had more precipication back into the cold side.

I think this setup favors interior areas (noting the downstream flow), esp NNE, but with large changes run to run, it seems the possible range of options is wide.

Its tough for me to envision the trough axis being far enough east at the time it goes negative to give us a mostly frozen coastal storm for New England...though its not impossible. If we can get the confluence to our northeast stronger in subsequent model runs then we may have a shot at that. I still think our best chance at frozen is having more of an overrunning wave.

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Couple of decent GEFS members, but most are cutters with timing differences.

Yeah prob like 2/3rds of the members have Stowe employees wondering where all the snow gun hoses went....a few are messy type events with probably some CAD icing/sleet....and then a few full blown snowstorm type solutions as well.

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The 12z GEFS look quite a bit cooler than the Operational. Wish I had the frames in between these two for the storm.

The primary low starts to decay at hour 156

And it pops a coastal at hour 168. Individual ensemble members should definitely be interesting to see.

The mean suggests a major storm is at least on the table. That's a pretty good look for 6 days out. There is frontside overrunning and coastal wraparound potential to keep an eye on, which helps ease the boredom of this recent stretch of weather.

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Yeah prob like 2/3rds of the members have Stowe employees wondering where all the snow gun hoses went....a few are messy type events with probably some CAD icing/sleet....and then a few full blown snowstorm type solutions as well.

There's something with these statements that I can't stop laughing about.

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Its tough for me to envision the trough axis being far enough east at the time it goes negative to give us a mostly frozen coastal storm for New England...though its not impossible. If we can get the confluence to our northeast stronger in subsequent model runs then we may have a shot at that. I still think our best chance at frozen is having more of an overrunning wave.

I agree with you. I think NNY and NNE are in a much better position. And I wouldn't be surprised to see a cutter go through or west of there. That's what the largescale features suggest to me. As always, the devil is in the details.

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I burn pellets. Unfortunately no pellets fell in my yard during sandy. Splitting trees up that small,is time consuming

LOL Lots of tiny logs.

Well stronger in terms of the eventual cyclogenesis, yes... Slightly more potent vortmax, and a mid-level flow structure that led to an earlier tilting of the trough. But 12z is nearly as potent and clearly further south. In fact the vortmax gets almost to the Gulf coast at 162hr!

The exact evolution will change dozens of times in the coming days. But the trend over the past 4 runs of the GFS is significant. If somebody has the ability to animate the runs, it's pretty stark. The amplitude of the longwave trough that develops has gotten larger and sharper. This introduces the possibility of a strong low center as opposed to the previous idea of a relatively weak, moisture laden wave. If we get lucky with the evolution and timing, a coastal low is not impossible. The 12z GFS never develops a good mid-level circulation, unlike the previous run, which had more precipication back into the cold side.

I think this setup favors interior areas (noting the downstream flow), esp NNE, but with large changes run to run, it seems the possible range of options is wide.

I agree to a point. One thing though is that I don't think it's possible to talk about the GFStrends--unless you're speaking specificially of the amplitude of the trough. That might be true. But I don't think the bouncing around of the placement of the trough can be defined as a trend. Unless of course, one defines the trend of the GFS to be incosistent. smile.png

Regardless, I'm fairly pleased by this run. Might get a little something on the front end.

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There's something with these statements that I can't stop laughing about.

I think they are hilarious too...I'm more worried about the folks that work at Mt Tolland Resort though ;)

But I got my freak out done in early November and look how that turned out? Up here we are having the best November skiing since I started here even if it is man made...just having -1 to -2 for the month makes a world of difference this time of year in snowmaking.

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