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March 24-25 Winter Storm Threat


Mitchel Volk

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Seeing the 18z GFS,GEFS and now the Navgem close to the coast and further north than the Euro tends me to believe that the Euro will come north.

It may come north but we still have a long while of trending and model runs and whatnot to go through before we have a good idea of what this is doing

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Very sloppy looking on tonight's gfs, it eventually has a coastal but it's later than before. The gfs loves to plow through blocks as we get into the extended ranges, but this block is too strong to plow through so it eventually makes a transfer.

 

I will strongly favor the Euro over the gfs with this event as it has the accuracy advantage for this time period. 

 

Also has a sneaky little event on the 21st, wonder if this can trend more favorably. 

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Very sloppy looking on tonight's gfs, it eventually has a coastal but it's later than before. The gfs loves to plow through blocks as we get into the extended ranges, but this block is too strong to plow through so it eventually makes a transfer.

 

I will strongly favor the Euro over the gfs with this event as it has the accuracy advantage for this time period. 

 

Also has a sneaky little event on the 21st, wonder if this can trend more favorably. 

Yea that little event could be pretty significant if it can form closer tot he coast

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Bowling ball...not too dissimilar to the older runs of the GFS or GGEM. It's definitely dampening by the time it gets to the east coast though...underneath the blocking.

 

weird seeing this with so much energy left behind, the euro still likes that second system it seems

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The 6z GFS has a pretty different solution for our area than the 00z run, just looking at the surface charts. This should be more favorable for our area.

Yea completely different look. Tells you the models don't have an idea yet. Looks like it skims us this run

- Looks similar to euro ensembles

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Record march blocking....check

MJO phase 8....................check

Closed low.......................check

Active STJ........................check

ecmwfNA_200_spd_144.gif

Starting to get more exciting as we move forward each model cycle. I think the really encouraging thing is the very good model agreement at this range for a significant low traversing somewhere off the East Coast, despite the varying evolutions aloft.

The main thing I am concerned about at this range is an early cutoff and occlusion of the shortwave trough over the Plains. Some guidance has been hinting at the southeast ridge heights connecting with the block shifting south over Canada, while the shortwave of interest is still back to the west. This slows everything down and allows the upper level low to really occlude before shifting east with much less impressive dynamics.

Hopefully the shortwave can eject far enough south to tap into the active STJ but not cut off. I've said this a few times but I think we're cruising towards dealing with a sharp cutoff on the NW side of this system as well.

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Starting to get more exciting as we move forward each model cycle. I think the really encouraging thing is the very good model agreement at this range for a significant low traversing somewhere off the East Coast, despite the varying evolutions aloft.

The main thing I am concerned about at this range is an early cutoff and occlusion of the shortwave trough over the Plains. Some guidance has been hinting at the southeast ridge heights connecting with the block shifting south over Canada, while the shortwave of interest is still back to the west. This slows everything down and allows the upper level low to really occlude before shifting east with much less impressive dynamics.

Hopefully the shortwave can eject far enough south to tap into the active STJ but not cut off. I've said this a few times but I think we're cruising towards dealing with a sharp cutoff on the NW side of this system as well.

 

Yeah, it will be interesting to watch the specific evolution and eventual impacts for our region. The best we can say right now

is this is as good a set up that you are going to see for a potential East Coast snowstorm post March 20th. Hard to tell where that

northern cutoff will set up so far out or which areas in the East will see the best snows.

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Starting to get more exciting as we move forward each model cycle. I think the really encouraging thing is the very good model agreement at this range for a significant low traversing somewhere off the East Coast, despite the varying evolutions aloft.

The main thing I am concerned about at this range is an early cutoff and occlusion of the shortwave trough over the Plains. Some guidance has been hinting at the southeast ridge heights connecting with the block shifting south over Canada, while the shortwave of interest is still back to the west. This slows everything down and allows the upper level low to really occlude before shifting east with much less impressive dynamics.

Hopefully the shortwave can eject far enough south to tap into the active STJ but not cut off. I've said this a few times but I think we're cruising towards dealing with a sharp cutoff on the NW side of this system as well.

 

Kind of a concerned about this too. The GFS and Euro ensembles, they've backed off the idea of Canadian block connecting/merging West Coast Ridge, for this threat. That supports the idea of cut-off over Central Plains:

 

353cphj.jpg

 

 

2v2xrb8.jpg

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