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January 26-27 Storm Threat - II


Baroclinic Zone

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GFS is not involving the n stream nearly to the extent of the EURO.

Maybe just timing differences....looks pretty good to me at hr 72.

Both.

The whole evoloution of the trough is just slower ont he GFS because it isn't as amplified.....H5 catches it s of sne on the EURO and s of NS on the GFS.

Like I said, all I need to see is the EURO hold serve at 12z.

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Much better system on the 12z GFS for us down here in SE areas.

As Phil said sure sign it's heading to the canal in the end!

Bounce seems to be a major struggle models are having in trying to figure out how it comes together. We have some strong runs with ideal tracks that are remarkably warm....which seems odd. In any case, Euro, GGEM and Ukie should be interesting.

I think extreme/inland is going away/may go away after this run. Track window has been the BM before including the ensembles only to end up way NW.

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1000-500mb gradient looks pretty poor to me, in terms of a lack of upper-level cold air

do u see this as a red flag?

Well it's always good to have a nice thermal gradient. The low prior to it's arrival, over the GL warms the mid levels. Both models seemed to throw back quite a bit of QPF on the nw side of the low. The problem was that much of it was not nw of the 0C 850 line, but I think dynamics would compensate a bit. Loop the 850 temps on the GFS and look how they crash to the east..off the NJ coast. The low will be over the warm gulf waters, so it should have copious amounts of moisture. The hope is that it comes nw enough to dump this moisture over sne.

In theory, it's good to have an arctic source of air nearby with a nice high, but it doesn't have to work like that. I think the red flag with this is the nrn stream and how it interacts. The problem I also see is that it almost is a threading the needle type thing. In other words, if we lose confluence, this will want to turn the corner and push right into sne. On the other hand, the nrn stream could flex its muscle and kick it further ots. Fortunately, the ensembles have been consistent with threading the needle for days, but we must remember that we are 4 days out.

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Well it's always good to have a nice thermal gradient. The low prior to it's arrival, over the GL warms the mid levels. Both models seemed to throw back quite a bit of QPF on the nw side of the low. The problem was that much of it was not nw of the 0C 850 line, but I think dynamics would compensate a bit. Loop the 850 temps on the GFS and look how they crash to the east..off the NJ coast. The low will be over the warm gulf waters, so it should have copious amounts of moisture. The hope is that it comes nw enough to dump this moisture over sne.

In theory, it's good to have an arctic source of air nearby with a nice high, but it doesn't have to work like that. I think the red flag with this is the nrn stream and how it interacts. The problem I also see is that it almost is a threading the needle type thing. In other words, if we lose confluence, this will want to turn the corner and push right into sne. On the other hand, the nrn stream could flex its muscle and kick it further ots. Fortunately, the ensembles have been consistent with threading the needle for days, but we must remember that we are 4 days out.

cool, thanks

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Also has a really fast flow up north

Yea, that is what I noticed early on....the reason the "evoloution of the trough" is slower is because the N stream energy phases in later due to it running out more ahead of the s stream.

N stream completes phase s of sne on the EURO, which is what the interior wants, but it completes the phase s of NS on the GFS....which is what you want.

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I've gone back and forth on their value with this event. I always like to lean on them...

But if the amped up solution (I.e. The euro) is in the works...I worry they will be too far se and too cold.

I agree....I think there value here is more with regard to leaning against the faster N stream idea, not so much that the lc will actually track there....I'd say betwn there and your BY.

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Ok and is that realistic? what's your thoughts?

My thoughts are wait for the 12z Euro. It's been very consistent thus far. If the Euro holds, throw out everything else -- perfectly serious.

Some other thoughts include: There are a plethora of ways for this to be a non-event for New England, and only a couple ways for this to be a significant snow storm.

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