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And we're off - first threat for a few mangled flakes


earthlight

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Euro is still well east of where we want it. With no closed 500 the surface low slips east of the BM which means no CCB and light to moderate rain with whatever falls.

The trough doesn't go negative enough to push to low further up the coast.

It has to be perfect or else no one has a prayer for this storm. The CCB has to develop properly and overhead, with strong lift and dynamics to transport cold air down. Anything less is just rain everywhere but on some hilltops.

50 or 75 miles is very easy to bridge at this range though. The trend from 12z overall looks positive.

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I was a bit surprised about the propogation of the 500 mb pattern.. It actually looked rather sharp and then the trof sort of just propogated east, which in turn pushed the development and everything else east.

H5 over the great leaks opened up, low slips east.

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The shortwave in question never closes off, takes on a nice negative tilt though before it shoots ene

yes, the players are all there, like always, its the finer details.

Better sampling tonight and tomorrow will help.

This one isn't over yet to see our first flakes and accumulations to the north.

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Pretty pumped after the 12z suite. Keeping expectations realistic as to the time of year, we have plenty of time 84 hours out to see the models show more favorable solutions, especially given what the gfs ensembles did and how close the euro is to having a more explosive system closer to the coast.

Would like to see the Ukmet at 84 hours, stupid model output! :arrowhead:

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It will also help to have that PV lift north of NNE and allow the height field to buckle.

Yeah the earlier runs of the Euro actually had a very favorable buckle/ridge building in as the trough amplified over the Central US and the PV lifted north. We have lost that a bit in the latest runs.

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It will also help to have that PV lift north of NNE and allow the height field to buckle.

we have seen the models hold onto those sub-pv's too long over NNE. Given how the block is breaking down and isn't overly strong, no reason it can't lift out a little sooner.

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as I said earlier, we are 4th and inches. Considering the amount of time we have left, plenty of reason to stay interested in this one.

The 12z Thursday runs should get us close to the 60 hr window for the low approaching our latitude along with better sampling of both streams.

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The 12z Thursday runs should get us close to the 60 hr window for the low approaching our latitude along with better sampling of both streams.

yea, the disturbances associated with it are still well offshore.. this is a pretty progressive pattern too. We've all seen how poorly some of the models have handled energy coming into the Pacific NW and southern Canada.. Often times, the disturbances are stronger than originally progged

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yea, the disturbances associated with it are still well offshore.. this is a pretty progressive pattern too. We've all seen how poorly some of the models have handled energy coming into the Pacific NW and southern Canada.. Often times, the disturbances are stronger than originally progged

The Nina progressivism of the flow is adding all the more chaos as well to make it almost impossible to make educated long term guesses here. Obviously 12/26/10 was dead for a couple of days before magically being resurrected 2 days prior.

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Although things look to be playing out similar to winter when models slowly catch on to amplification, I still think the upper air pattern and ampliciation is just a bit flat. When looking at the mid level height field on the models, it's just not quite there in terms of what you want to see if you're hoping to tuck a strong low pressure in near the coast.

Also, when comparing the 12z GFS to the 00z GFS during the period of the best height falls and trough amplification, the 00z run was actually much more robust. The ensembles being closer to the coast offer some hope.

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Although things look to be playing out similar to winter when models slowly catch on to amplification, I still think the upper air pattern and ampliciation is just a bit flat. When looking at the mid level height field on the models, it's just not quite there in terms of what you want to see if you're hoping to tuck a strong low pressure in near the coast.

Also, when comparing the 12z GFS to the 00z GFS during the period of the best height falls and trough amplification, the 00z run was actually much more robust. The ensembles being closer to the coast offer some hope.

yea.. a closed off system at 500 mb would be the ultimate dream.. that seems to be far off, at least at this point.

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