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Feb 8th-9th Potential Significant Coastal Storm


dryslot

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QPF worries. Peeps to the NW need to remember there should be some good mid level deformation banding.

 

Yeah and this thing is not going to have a shredded dryslot like Boxing day...unless guidance totally changes.

The biggest worry is still having this storm escape east.

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QPF worries. Peeps to the NW need to remember there should be some good mid level deformation banding.

 

I'm not sure. The frontal zone could end up sloped more vertically, and the mid level deformation zone further southeast, just contributing to the epic banding over eastern New England.

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Saw that it looked way south

It's not really way south.  It just deepens the coastal low sooner and more aggressively than most other guidance.  That would likely mean more coastal related QPF a little further NW and potentially an earlier capture.  But it's just speculation.  It could ultimately evolve similar to the GFS or Euro, just deeper.  Really not much different than everything else, except the NAM.

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Ah ok, so a bit lower but still great. Wonder how the EURO is going to trend..

The Euro has had good continuity, so it probably won't change much. It's possible that the GFS is trending toward the Euro and probably went a bit too far in lowering qpf across parts of eastern New England. The 0z runs should be interesting.

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How do we know if the storm peaked on the RGEM since it runs to hr 48?

When upper level divergence is no longer greater than low level convergence (pressure/mass of air above stops decreasing and potentially starts increasing, hence stagnant or rising surface pressure).  Or graphically, when the upper level low is close to or stacked on top of the surface low.  At 48hr on the RGEM the low has not peaked.  It would intensify rapidly for several more hours until the northern stream trof catches up to it.

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It's not really way south.  It just deepens the coastal low sooner and more aggressively than most other guidance.  That would likely mean more coastal related QPF a little further NW and potentially an earlier capture.  But it's just speculation.  It could ultimately evolve similar to the GFS or Euro, just deeper.  Really not much different than everything else, except the NAM.

 

 

Yeah, Well that would not bode as well up here if it captures and closes off further south, I would need it to make it at least to 41/68

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Who looks to be in the best position with regards to the mid level lows?  

 

 

Euro had a massive deformation signal for the foothills area on the 00z run, I didn't get a chance to peek too much at the 12z because we were really into it with the collaboration and phone calls. The potential for banding is really off the charts.

 

And that snow totals map I came up with today was a bear. I mean it's hard to come up with something that doesn't look clownish, with the modeled QPF out there. That's probably a 80ish percent QPF to snow using a SREF/ECMWF blend to get the original QPF grid.

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Yeah the jackpot fetish is starting to rear its ugly head about now. We need another couple model runs to really worry about that. This still can wiggle quite a bit and its obviously a delicate setup. Hell, we nearly lost the storm to the east on the 12z Euro before the late capture.

 

Well, of course everyone wants to jackpot. And, there will be shifts between now and game time to be sure.  But, I think it's safe to say that the biggest winners (note the word "biggest") will be somewhere  from the worceater hills east.  Perhaps SE of there toward Bob?

 

QPF worries. Peeps to the NW need to remember there should be some good mid level deformation banding.

 

Please oh please.  Though Sam's comments about that being more SE than usual is a big cuation flag there.

 

Either way--fun times in store.  Meanwhile, 34k on my way to PHL.  Only one flight left.

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Euro had a massive deformation signal for the foothills area on the 00z run, I didn't get a chance to peek too much at the 12z because we were really into it with the collaboration and phone calls. The potential for banding is really off the charts.

 

And that snow totals map I came up with today was a bear. I mean it's hard to come up with something that doesn't look clownish, with the modeled QPF out there. That's probably a 80ish percent QPF to snow using a SREF/ECMWF blend to get the original QPF grid.

Interesting to hear a little about how the sausage got made. Sorry if you've already been asked this, but do you think blizzard watches/warnings could be in the cards for the SW ME coast? Seems plausible to my novice eye based on QPF, wind potential and anticipated duration.

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Yeah, Well that would not bode as well up here if it captures and closes off further south, I would need it to make it at least to 41/68

Yeah a late capture or NAM like solution would probably be best for you up there.  But then again, some of the SREF members that go wild with a tucked in low still crush you.  I think no matter what you are in a good spot.  There is probably a lot more margin for error for your location than many other places.  Just about every piece of guidance I've seen gives you at least 1" liquid and most are 1-2".  And you are a lot colder so there might be a fluff factor depending on the snowgrowth zone lift.

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