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potential for a few mangled flakes part 3


earthlight

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Whoever said the 00z NAM is torching for NW NJ obviously didn't bother to look at the map. All of Northern NJ is between 32 and 34 F on the NAM.

When looking at the 12km zoom maps on Ewall, you have to look at the thin contours between the 32 F and 40 F line. They are all packed in near the NJ Coast. Nowhere in Northern NJ is at or above 34 F.

So verbatim the oz NAM seems to have 8-12" for most of N NJ?

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Perhaps... but that latent heat release will take a while to kick in... it would be better if we already had a good moisture flux pre-event. The radar is not looking terribly impressive right now.

The center pressure is 2-4mb weaker this run at 21z tomorrow and the 850mb heights are about 30dm higher... the model might make up for loss time beyond that period, but overall its a slightly weaker solution.

At 21z tomorrow the 0z has a surface low near 999mb, which is about 2mb weaker than at the same time in the previous run. But by 0z tomorrow, the slp difference is less than 1mb. Further, the rate of deepening is almost identical. And slight weakness in the system this run is well within the ensemble spread and clearly within the margin or error between simulation and reality. Any robbing of the moisture in the tropics I think is overstated. But of course future the last few runs could tell a different story. There are lots of factors influencing the strength and evolution of our would be storm, not just whats going on down near Florida. I think our system has plenty of moisture to work with. I also think the radar looks fine right now.

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some pretty good thundersnow signals showing up in the bufkits, its cool to put in EWR through BDR and see the snow line come east. Also, BDR gets an extended period of snow which helps their totals.

I said the same thing to John (Earth) 3 hours ago. Check out the omega in the snow growth zone.

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Yep... look at all those blobs of pinks and reds south of the low center... all that convection is preventing the best moisture influx into the area where cyclogenesis is occurring. This is why we see a weaker solution.

Do you think differences in model resolution causes these sort of differences between the GFS and NAM?

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