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January 11-12 Snowstorm Disco


Baroclinic Zone

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This thing is already under modeled. The coastal is being under-forecasted, and the latest pressure falls are up the coast. The low is already W of any model. The way it is already exploding is impressive. The real fireworks don't begin for another 4-6 hours until the dynamic trop reaches the coast. This could very well hug the coast with the 06Z NAM verifying.

Agreed, very interesting

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The 06Z NAm may very well verify on track if the trends continue.

Fan freakin' tastic. Fits in perfectly with the NW bump of the band/heaviest snow discussed this afternoon.

Look at that area from north DE to south/central NJ and southeast PA, wow. Coming our way.

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I think it seems pretty close tot he NAM and models like WRF-NMM. So far so good...I don't see any surprises or anything yet.

The latest pressure fall analysis has the greatest falls along the coastline well NW of the current low. 18Z NAM takes this NE, pressure fall analysis will have this developing NW.

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Here's the 6h 18z GFS, 1012, pretty much exactly where the SPC drew it, it's maybe 1/2 a MB weak as the 1014 is pushed out more by the SPC. Omega looked to line up well with what we saw on the radar etc at 0z.

NAM wasn't bad either...GFS probably should have been 5-10 miles west. GFS did a pretty good job of pinpointing less than stellar returns of DE where the NAM was going to town.

18zgfs1000440mbRh700mbOmega006.gif

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New 23z RUC Murders W CT and W MA with 2-5" per hour mega band around hours 13-15 (at 10:1 ratios)

Out of its range... but still....

That makes me feel pretty good...as the RUC is almost always too wrapped up west at that time range. I think a band might initially try and setup out there but its going to go to town a little further east.

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I've been trying to figure out what the f*** the MRG site is all about. What's going on with the trails being closed or am I on an old page?

--

Far as closer to the coast stuff goes...oregon inlet marina is about 1012.7, that's essentially exactly what both the 18z GFS and NAM had per these maps

http://tempest.aos.w..._cpres_h006.gif

http://tempest.aos.w..._cprese_h06.gif

If anything the NAM was a mb too strong....but inconsequential crap when we're talking about 1012-1013 at this stage, means nothing.

Ever been there? The trail count will probably go up to 100% shortly. The Birdland section serviced by the double is the part of the area with the less severe terrain (although there is still some nosebleed steep stuff in there as well). That section is far less prone to wind scouring than the Summit serviced by the Single. The vast majority of the terrain off the Single is very steep and at the Summit, with the very light dry snow they've been getting, susceptible to scouring. I'll be there Thursday and if the Single isn't running (though I expect it will be) we'll just skin up to access the goods in the steep trees. Best skiing in the East (sorry powderfreak). As for the not being tucked in to the coast as far as I can tell you're alone on that, so far.

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The latest pressure fall analysis has the greatest falls along the coastline well NW of the current low. 18Z NAM takes this NE, pressure fall analysis will have this developing NW.

Pressure falls look east of the Delmarva and then extending nw with the parent low, where they should be. Lows don't necessarily have to gravitate to the strongest pressure falls. All the models had this scraping the coast near 00z, but then the baroclinic zone slowly moves east, as the storm develops and moves north. I do agree NYC could get interesting, but it will be a close call!

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Yeah but how is it being under modeled at this hour? The pressure is right around where it was forecast by every single model.

Perhaps you didn't see some of the buoys earlier, but at 18Z there were reports of 1012, and at 21 Z 1013. 0Z it is off coast--and no buoys are available now where the low is progged to be. Best I can see now is 1012 but the low already passed through.

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Pressure falls look east of the Delmarva and then extending nw with the parent low, where the should be. Lows don't necessarily have to gravitate to the strongest pressure falls. All the models had this scraping the coast near 00z, but then the baroclinic zone slowly moves east, as the storm develops and moves north. I do agree NYC could get interesting, but it will be a close call!

Yeah it will be interesting watching this develop. NAM takes it NE hereafter--but trends suggest NW if those pressure falls hold steady. DT ejects around 04-06z and the real cyclogenesis develops. If it is still hugging the coast it is all over.

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Some of the folks in other regions were for some reason calling storm cancel on this a few hours ago even though all obs had the coastal far more developed and farther W. Then Henry Margusity opened his big mouth and said some nonsense about the OV low pushing the coastal farther E. Silliness--and pathetic meteorology.

Oh yes, this caused quite the uproar for the AccuWx forums, facebook, what have you. Joke.

That makes me feel pretty good...as the RUC is almost always too wrapped up west at that time range. I think a band might initially try and setup out there but its going to go to town a little further east.

For once, I absolutely love where I am for a storm.

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Yeah it will be interesting watching this develop. NAM takes it NE hereafter--but trends suggest NW if those pressure falls hold steady. DT ejects around 04-06z and the real cyclogenesis develops. If it is still hugging the coast it is all over.

Are you from around here?

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