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Thanksgiving Weekend Weather (Wed-Sun)


ORH_wxman

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It's still kind of early...remember even in the Feb 2013 blizzard it was flat until about 48 hours out and then it started doing crap like jackpotting N NJ.

 

If the RGEM was right, The Euro would have made an epic bust as that would be quite a leap in the wrong direction

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It's just not the pattern for a bomb like that. At worst it's anafrontal type stuff IMO. Even that isn't high confidence. The euro op digs the s/w over the coastal Gulf of Mexico and then pumps up heights in the east so that it kind of phases with the trough to the north. The GFS isn't too far off, but the s/w is sort of cutoff from the trough to the north and cannot amplfy enough to develop a low.

Dug this up from yesterday. To help an amateur understand, what has changed since this post on the models/depicted pattern that is now allowing this thing to amplify into something more than "at worst...anafrontal type stuff"?
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Dug this up from yesterday. To help an amateur understand, what has changed since this post on the models/depicted pattern that is now allowing this thing to amplify into something more than "at worst...anafrontal type stuff"?

 

Well the ridging out west and the s/w interactions all changed. The s/w in MO was also stronger this go around too. Combine that and it's not a bomb, but a good coastal. It only takes a tweak here and a tweak there to cause a better solution. 

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The 2nd shortwave diving in almost acts as a kicker on this GFS run...this is sort of what I was describing before...if there isn't much interaction between the two and minimal phasing, then the progressive pattern sort of makes the 2nd shortwave act as a kicker rather than an amplifying agent.

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The 2nd shortwave diving in almost acts as a kicker on this GFS run...this is sort of what I was describing before...if there isn't much interaction between the two and minimal phasing, then the progressive pattern sort of makes the 2nd shortwave act as a kicker rather than an amplifying agent.

 

Yeah we lose the ridge amplitude a bit and that second s/w boots the first one. Also, the heights ahead of the first one weren't as sharp and you end up with a conbined less amped solution.

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Well the ridging out west and the s/w interactions all changed. The s/w in MO was also stronger this go around too. Combine that and it's not a bomb, but a good coastal. It only takes a tweak here and a tweak there to cause a better solution.

Thanks for the explanation. It's cool to see how even small tweaks in the setup lead to larger scale changes overall. It will be interesting to see this evolve.

Even if for the benefit of eastern areas, this did pass over ACK or the BM, wouldn't the NE flow off the Atlantic torch the BL for the CP? It is November afterall. Or does the fact that this isn't a wrapped up bomb help? I bet there would be a good coastal front to follow in that scenario.

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Thanks for the explanation. It's cool to see how even small tweaks in the setup lead to larger scale changes overall. It will be interesting to see this evolve.

Even if for the benefit of eastern areas, this did pass over ACK or the BM, wouldn't the NE flow off the Atlantic torch the BL for the CP? It is November afterall. Or does the fact that this isn't a wrapped up bomb help? I bet there would be a good coastal front to follow in that scenario.

 Of this takes a track SE of ACK, then the CF is pinned near BOS and you'll have no taint at all. Winds will be north where you are.

 

Also take note what Will said. If you get less of an interaction of the s/w in MO and the one over the SE,  that MO S/W will mess around with the winds and boot the first one further east. The progressive nature of the flow actually helps us in this way if you want snow here.

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Of this takes a track SE of ACK, then the CF is pinned near BOS and you'll have no taint at all. Winds will be north where you are.

Also take note what Will said. If you get less of an interaction of the s/w in MO and the one over the SE, that MO S/W will mess around with the winds and boot the first one further east. The progressive nature of the flow actually helps us in this way if you want snow here.

Thanks again. That all makes sense. However we manage to keep the wind more northerly helps tremendously so early in the season. Or being on the right side of the gradient in a swfe pattern.
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