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November/December Medium/Long Range Disco


WinterWxLuvr
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Just now, stormtracker said:

I may have spoken too soon.  :huh:

Yeah, GFS is a hit. Ignore the bad thermal profiles. But it’s sort of a wonky 500 evolution. Still more panels to see, but the main southern shortwave sort of gets consumed by this bigger northern wave?

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3 minutes ago, yoda said:

its track is over the Delmarva though

 

4 minutes ago, WxUSAF said:

Yeah, GFS is a hit. Ignore the bad thermal profiles. But it’s sort of a wonky 500 evolution. Still more panels to see, but the main southern shortwave sort of gets consumed by this bigger northern wave?

 

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21 minutes ago, Bob Chill said:

Cmc is doing a weird follow up wave/coastal. The storm in focus is a slider solution. Which is totally fine for now.

 

11 minutes ago, WxUSAF said:

Yeah, GFS is a hit. Ignore the bad thermal profiles. But it’s sort of a wonky 500 evolution. Still more panels to see, but the main southern shortwave sort of gets consumed by this bigger northern wave?

Obviously the whole evolution could change since we are still at really long range here but right now most of the guidance is suggesting that kind of interaction.  The initial stj wave is way out ahead of the upper level support diving into the trough from the northern stream.  Given the flow, if that stj system is on its own and doesn't interact at all its likely to be a southern slider.  But...most of the guidance is now suggesting some sort of convoluted interaction where perhaps there is a front runner that escapes then a second piece partially phases.   I guess the interaction is good because without it that southern system is likely squashed but it introduces possible temperature problems if the track isnt perfect given the prolonged southerly flow as the upper level trough approaches.  

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4 minutes ago, psuhoffman said:

 

Obviously the whole evolution could change since we are still at really long range here but right now most of the guidance is suggesting that kind of interaction.  The initial stj wave is way out ahead of the upper level support diving into the trough from the northern stream.  Given the flow, if that stj system is on its own and doesn't interact at all its likely to be a southern slider.  But...most of the guidance is now suggesting some sort of convoluted interaction where perhaps there is a front runner that escapes then a second piece partially phases.   I guess the interaction is good because without it that southern system is likely squashed but it introduces possible temperature problems if the track isnt perfect given the prolonged southerly flow as the upper level trough approaches.  

So...what would we need to see to get a "perfect" track?...HP in a particular place? Timing? (Sounds like a rollercoaster week ahead if we're talking about that kind of evolution!)

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9 minutes ago, Maestrobjwa said:

So...what would we need to see to get a "perfect" track?...HP in a particular place? Timing? (Sounds like a rollercoaster week ahead if we're talking about that kind of evolution!)

There's really nothing specific to track yet. Too far away in time. If you look at the ens guidance the solutions are still all over the place. Each ens and op solution is equal odds. We're still prob 5 days away from narrowing down highs/lows/evolution enough to discuss specific placements of features. Right now we could get all rain, all snow, both, or none. Nobody can give any specifics as to which one is more right than wrong yet. 

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57 minutes ago, WxUSAF said:

Yeah, GFS is a hit. Ignore the bad thermal profiles. But it’s sort of a wonky 500 evolution. Still more panels to see, but the main southern shortwave sort of gets consumed by this bigger northern wave?

Ways out there but the warmish thermals have some credibility as we now have more of a tucked look on many pieces of guidance and this early with a warmish ocean still a tucked low probably wont cut it for i95 but this is all cloud talk as there is quite a ways to go. But this is the reason we are going to need NAO ridging this year. In many Nino patterns the tendency is cut or tucked. Without the nao ridging what we saw on the cmc, and the gfs family makes perfect sense. But again plenty of time and at least we have something to track again this early in the season.

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29 minutes ago, Maestrobjwa said:

So...what would we need to see to get a "perfect" track?...HP in a particular place? Timing? (Sounds like a rollercoaster week ahead if we're talking about that kind of evolution!)

Bob is 100% right, this could still evolve into several different scenarios.  Way too early to say.  But how COULD this work for us?  Well the easiest thing to root for would be a stronger more consolidated initial system that can get the job done while the cold source is still there.  Even then we would need a good track and high and all that jazz but getting a big slug of gulf moisture thrown at us with cold in place is a pretty simple way to score around here.  If things remain kind of disconnected between the initial stj system and the upper level trough then we need the h5 track to be good and the secondary low to form in the right spot and track up the coast not inland.  Get the h5 low over us and we will be ok in that scenario...but have it stall out to our west like the 12z GFS and GGEM show and we will have temperature problems even with a good surface track from a prolonged southerly flow at mid levels.  Those are the 2 simplest ways to get er done so to speak...  

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