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December 9, 2017 - Storm Discussion (Breaking the seal on the season for many)


Baroclinic Zone

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9 minutes ago, TauntonBlizzard2013 said:

I think your fine... this run still looks basically 100% fine for folks west of the canal.

I feel pretty good here 

Cold levels @ 925 definitely providing a bit of wiggle room west of the canal. Just saying it will get more precarious with any additional shifting. 

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1 minute ago, CoastalWx said:

That's what I am guess too. Will be interesting.

It's like -3C at 950mb...gonna be hard to taint with that. It tries to tickle above -2C for a brief time....but again, 950 is pretty low...gonna need at least 0C there to taint IMHO. I think this system is moving too fast to really bring a lot of taint away from the Cape...maybe for a couple hours on extreme south shore...we'll see. I suppose this could go apesh**....but I'd want to see more evidence for that.

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Just now, ORH_wxman said:

It's like -3C at 950mb...gonna be hard to taint with that. It tries to tickle above -2C for a brief time....but again, 950 is pretty low...gonna need at least 0C there to taint IMHO. I think this system is moving too fast to really bring a lot of taint away from the Cape...maybe for a couple hours on extreme south shore...we'll see. I suppose this could go apesh**....but I'd want to see more evidence for that.

Yeah the GFS is pretty cold. That's usually what I look for. -2c or so at 950. Sometimes this longitude sticks out just enough...but not always. For now, it looks pretty good even here I think. 

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7 minutes ago, ORH_wxman said:

That's a really nice GFS run for many. It's amping up nicely increasing the ML fronto....but at the same time, speed is helping keeping this thing from going up the CT River. It's moving right along.

Definitely time to start thinking about convection in the GoM. 

Are we going to keep it more N/S and induce the southerly LLJ, or will it be more shunted east. Right now models are favoring N/S, hence latent heat building up the ridge and allowing westward nudges. Also increasing that f-gen you mention, as the mid level warm front isn't going too far north with that northern stream shortwave barreling through.

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