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Threat Jan 25-28th time fram. Possible Miller A


IsentropicLift

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Hopefully more like December 2000 aka Millenium Blizzard-- the bold part really reminds me of that. Storm tracked over Central LI and Western LI stayed all snow :thumbsup::snowman::gun_bandana:

That's NOT nice Alex. We did horribly in that one. I'd much rather the March '93 scenario.

( I just noticed the map, look how they spelled Philadelphia! :lol:)

12302000.jpg

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That 6z GFS run smells of a dynamic heavy wet snow for EWR and all the NW suburbs..not buying surface temperatures at 132 hours.

Through experience and what I have picked up on this and previous boards, the highs are not in good spots to bring cold air into this storm. Things can change, but current timing on the models is not good (cold air exiting stage right and another batch of cold air too far left). Some snow pre & post main storm is possible, but a lot of rain as currently depicted imho.

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HPC wrote about the GFS means and how it is that models bias in the means...

Yes and we all know how reliable the HPC has been this winter :thumbsup: Not really lol.

Both ensemble suites being east should be saying something-- especially the euro ensembles, which have done quite well this winter.

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That's NOT nice Alex. We did horribly in that one. I'd much rather the March '93 scenario.

( I just noticed the map, look how they spelled Philadelphia! :lol:)

12302000.jpg

Haha who wrote that?!

I'd rather see a PD2 scenario where we all get buried -- the sweet spot for the Millenium storm was NJ lol

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Haha who wrote that?!

I'm guessing State College as it's from their website.

You're probably somewhere out by Carbon County right? That's where my sister lives and she's been saying what a weird winter it's been out there.

Actually Schuylkill which got nothing from that event.

I'd rather see a PD2 scenario where we all get buried -- the sweet spot for the Millenium storm was NJ lol

That sounds good. That way we all enjoy a big snowfall. I'm liking that most models portray a rather large event next week. Of course we all know they'll change, but the signal is there for the potential for something good.

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Through experience and what I have picked up on this and previous boards, the highs are not in good spots to bring cold air into this storm. Things can change, but current timing on the models is not good (cold air exiting stage right and another batch of cold air too far left). Some snow pre & post main storm is possible, but a lot of rain as currently depicted imho.

The location of the high doesn't matter if you're looking at the 6z GFS verbatim...850s are below 0C here, surface temps are 32/33, and 1" QPF falls in 6 hours...that's a snow bomb for sure...I'm not immediately on the coastal plain but in the hills of Central Westchester. NYC is probably like 60% snow 40% mix...You've got a 528dm closed low over the area so there's incredible dynamics that are forcing cold air into the system, very similar to what happened in VT/Upstate NY in the 4/15/2007 storm when we got buried with 6-12".

By the way, both the GFS and ECM Ensembles have the storm occurring faster while the high is in better position over Upstate NY/New England, with the low being further east on the vast majority of the ensembles. So those are a more traditional Nor'easter than the OP runs, and more accurate at this range.

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Strongly agree...could be a huge blizzard here.

The worst thing that probably happens is we get +SN-->RN/IP-->SN as the system exits and bombs. Too much cold air in place for an all rain event unless the track really shifts west to the Apps.

Im going to laugh if we all get 20" and like 30% of it isnt snow-- who honestly cares, 20" of snow is 20" of snow lol.

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Strongly agree...could be a huge blizzard here.

The worst thing that probably happens is we get +SN-->RN/IP-->SN as the system exits and bombs. Too much cold air in place for an all rain event unless the track really shifts west to the Apps.

?? I'm not following you guys. If the high escapes, and the low is that strong, a screaming east wind at the surface will change us to rain in a heartbeat. The high drifitng offshore alone means we dont have a -NAO/ 50/50 in place, hence this is not a HECS setup for NYC proper

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?...i see 2 that do, both cutters.

Sorry I had to zoom in with all those lines packed closely together. Im going by where the 0 (yellow) line is, the ones which have issues are COO1 AND POO2, and it seems like its only at hr 132. There are quite a few close shaves however (two more-- COO0 and POO4).

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?? I'm not following you guys. If the high escapes, and the low is that strong, a screaming east wind at the surface will change us to rain in a heartbeat. The high drifitng offshore alone means we dont have a -NAO/ 50/50 in place, hence this is not a HECS setup for NYC proper

I think theyre talking about the likelihood of that run verifying verbatim vs what the ensembles have, which is quicker and further east.

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?? I'm not following you guys. If the high escapes, and the low is that strong, a screaming east wind at the surface will change us to rain in a heartbeat. The high drifitng offshore alone means we dont have a -NAO/ 50/50 in place, hence this is not a HECS setup for NYC proper

I'm talking about what the 6z GFS shows...the 32 line is just north of NYC even with strong easterly flow, 850s mostly stay below 0C. Where I live in Westchester, we'd stay all snow with dynamics. We're talking about an H5 low with three closed contours at 138, so that's an incredibly deep system that can cool you dynamically in a heartbeat. The -NAO is east-based but it's still a decent block combined with the huge +PNA ridge out west. This run verbatim is probably a MECS for NYC and a HECS for the suburbs.

Remember, strong east winds aren't as big a deal as usual. Coastal SSTs are around 35F due to the unusually cold winter, and they'll go down a few ticks with the arctic outbreak this weekend. Much of the Hudson River and parts of LI Sound should be frozen by Tuesday. This isn't an ordinary winter so thinking in general terms about the bad effects of east winds isn't relevant.

Also, the 0z ECM ENS and 6z GFS ENS are well east of the OP runs, suggesting the discussion is moot. A coastal track would certainly be favored considering the seasonal trend and good blocking.

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I think theyre talking about the likelihood of that run verifying verbatim vs what the ensembles have, which is quicker and further east.

The ensemble mean is further east Im assuming because its a mix of the stormy solutions which are rainy and the suppressed ones? I mean, the NAO is raging postive and the confluence goes bye bye. I cant picture this not changing to all rain for us

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I'm talking about what the 6z GFS shows...the 32 line is just north of NYC even with strong easterly flow, 850s mostly stay below 0C. Where I live in Westchester, we'd stay all snow with dynamics. We're talking about an H5 low with three closed contours at 138, so that's an incredibly deep system that can cool you dynamically in a heartbeat. The -NAO is east-based but it's still a decent block combined with the huge +PNA ridge out west. This run verbatim is probably a MECS for NYC and a HECS for the suburbs.

Remember, strong east winds aren't as big a deal as usual. Coastal SSTs are around 35F due to the unusually cold winter, and they'll go down a few ticks with the arctic outbreak this weekend. Much of the Hudson River and parts of LI Sound should be frozen by Tuesday. This isn't an ordinary winter so thinking in general terms about the bad effects of east winds isn't relevant.

Also, the 0z ECM ENS and 6z GFS ENS are well east of the OP runs, suggesting the discussion is moot. A coastal track would certainly be favored considering the seasonal trend and good blocking.

Ok you further north could always work out. I guess I was being a little coastal NJ/NYc proper- centric

40-50º ocean temps arent too far offshore remember. A strong easterly fetch will bring that air inland

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I'm talking about what the 6z GFS shows...the 32 line is just north of NYC even with strong easterly flow, 850s mostly stay below 0C. Where I live in Westchester, we'd stay all snow with dynamics. We're talking about an H5 low with three closed contours at 138, so that's an incredibly deep system that can cool you dynamically in a heartbeat. The -NAO is east-based but it's still a decent block combined with the huge +PNA ridge out west. This run verbatim is probably a MECS for NYC and a HECS for the suburbs.

Remember, strong east winds aren't as big a deal as usual. Coastal SSTs are around 35F due to the unusually cold winter, and they'll go down a few ticks with the arctic outbreak this weekend. Much of the Hudson River and parts of LI Sound should be frozen by Tuesday. This isn't an ordinary winter so thinking in general terms about the bad effects of east winds isn't relevant.

Also, the 0z ECM ENS and 6z GFS ENS are well east of the OP runs, suggesting the discussion is moot. A coastal track would certainly be favored considering the seasonal trend and good blocking.

Some really good points, Nate. Also, let's keep in mind that the Millenium storm featured similar SST and that storm was also a hugger that stayed all snow. While the gradient to the west and east wont be as sharp, thankfully, it could be the same kind of scenario with snow right up to or very close to the path of the low.

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The ensemble mean is further east Im assuming because its a mix of the stormy solutions which are rainy and the suppressed ones? I mean, the NAO is raging postive and the confluence goes bye bye. I cant picture this not changing to all rain for us

I thought you (or maybe it was someone else) said that the NAO goes negative for awhile next week?

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The ensemble mean is further east Im assuming because its a mix of the stormy solutions which are rainy and the suppressed ones? I mean, the NAO is raging postive and the confluence goes bye bye. I cant picture this not changing to all rain for us

The NAO is not positive for this storm...you can see on CPC it is weakly negative:

You can see the east-based block here with all the strong south winds at H5 east of Greenland:

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