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NYC/PHL 1/25-27 potential Part III


NortheastPAWx

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Interesting. So what then do you think should be happening?

Mike, does the last run of the euro look right to you? The GFS is out in right field literally. The euro being closer to the coast brings the warmth in and undercuts the existing high. Your thoughts please?

I think that the track of the surface low will fall somewhere between the 12z GFS and 00z ECMWF. It will be interesting to see what the 12z ECMWF decides to do. It does seem like the storms have been trending closer to the coast this season and this is what concerns me. The large arctic high is forecast to be sliding eastward with time so with nothing really to anchor that cold source to our north or northeast, the flow becomes east to southeast so the milder air will be translated westward. There will probably be a well defined coastal front developing and that will tend to strengthen the thermal gradient. Will this be enough to pull the surface low farther west? Not real sure just yet. The signals are there though for a potentially large and significant Nor'easter but the track is a real nail-biter at this point.

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euro looks nothing like last night and is adctually pretty spot on to 12z gfs. Can the euro humping stop now? neither model is likely handling this correctly.

Time to start paying attention to that HP coming out of canada behind the current one. It seems to be taking a more prominent role.

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euro looks nothing like last night and is adctually pretty spot on to 12z gfs. Can the euro humping stop now? neither model is likely handling this correctly.

Time to start paying attention to that HP coming out of canada behind the current one. It seems to be taking a more prominent role.

The incoming HP is probably the key player here. If it is too late, too much warm air will have a chance to flood into the system but if it drops far enough se and is able to supply enough cold air to be wrapped into the low, many of us even at the coast could still get a good dump of snow.

WX/PT

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I think that the track of the surface low will fall somewhere between the 12z GFS and 00z ECMWF. It will be interesting to see what the 12z ECMWF decides to do. It does seem like the storms have been trending closer to the coast this season and this is what concerns me. The large arctic high is forecast to be sliding eastward with time so with nothing really to anchor that cold source to our north or northeast, the flow becomes east to southeast so the milder air will be translated westward. There will probably be a well defined coastal front developing and that will tend to strengthen the thermal gradient. Will this be enough to pull the surface low farther west? Not real sure just yet. The signals are there though for a potentially large and significant Nor'easter but the track is a real nail-biter at this point.

Well put; Agreed 100%. Lots of potential for significant precip, but the lack of anchored cold air will be a problem regardless for the coast. Further inland could have temp issues as well depending on how far west the low tracks. We have a large enough spread yet in the forecasts for a lot to happen.

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seems like the models are all pretty much agreeing on the fact that the H pressure is going to be a non-factor for keeping the cold locked in, it's an all or nothing scenario in regards to threading the needle with the low track and unfortunately they usually don't work out (at least for the coastal plain)

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euro looks to be about to .5 to .6 for nyc and is probably wet snow. 850's are cold, 540 line is probably on top at the warmest. Surface is above freezing but euro can struggle with surface temps. nothing like any of its other runs. Surface cools down with precip still going.

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euro looks to be about to .5 to .6 for nyc and is probably wet snow. 850's are cold, 540 line is probably on top at the warmest. Surface is above freezing but euro can struggle with surface temps. nothing like any of its other runs,.

Does it bring that supporting high pressure in, keeping the 850s cold?

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The way I see it is with blocking, timing is less of an issue because a strong block will maintain confluence and a 50/50 low in place. But without blocking, timing is everything. Kind of like with tropical systems that threaten the east coast. They have to arrive at the right moment or they go OTS, if the storm is a little bit slower or the high moves in faster, than we'll have more options than just 100% rain.

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euro holds onto the first high longer as it moves up, not totally off the coast, and the new HP is coming in fast which looks to prevent the slp from coming inland or up the coastal plain. Its scary how it looks like the dgex last night but less wrapped up.

Probably as close as it can come to the coast and still give the coastal plain snow.

Again, time to really start watching that new HP that the gefs show and now the euro, it could be the game changer here.

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