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March 24-25 Winter Storm Threat


Mitchel Volk

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GEFS is pretty nice, must be some really good hits in there

 

I'm sure there are...but I wouldn't put much stock into them until we get closer. They are notoriously bad with the north end of sharp cutoffs and gradients. I know several good forecasters who were really burned in Feb 2010 when the GEFS were consistently north of all of the global models with the cutoff -- they can be way too expansive with precipitation shields in that regard. 

 

Just a word of caution as we move forward...it definitely is still encouraging to see them more amped up. We're starting to lose the total whiff solutions at this point. 

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Energy looks more consolidated on the euro, with slightly higher heights out ahead of it

 

So far it looks slightly farther southeast with the vort max and more consolidated...but the confluence over New England is a hair farther south which is the main player at work in compressing the height field. We will see if it backs off in the next few frames. 

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So far it looks slightly farther southeast with the vort max and more consolidated...but the confluence over New England is a hair farther south which is the main player at work in compressing the height field. We will see if it backs off in the next few frames. 

 

between 66-78, the height field out ahead of it just gets squashed 

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This run still looks nothing like the more amped up models...it closes off the vort max and upper level low very far west. The height field deamplifies ahead of it and the entire thing elongates. By the time it hits the TN valley is it not amplifying like some of the other guidance..it's actually elongating and being compressed underneath the block and upper level low. 

 

Our chances of getting a big storm are very low if the Euro's depiction is correct. 

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It's hard to argue against the Euro in this range, amazing that even in a favorable pattern with historic blocking we still miss out.

I guess the blocking was too strong yet again while with the event before the blocking came in too late.

 

You're talking like it already happened. For a 96hr prog the euro aint too bad

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It's hard to argue against the Euro in this range, amazing that even in a favorable pattern with historic blocking we still miss out.

I guess the blocking was too strong yet again while with the event before the blocking came in too late.

 

 

I wouldn't Write it off yet.. Especially When GGEM has been Locked in to big storm for a couple days now and other Models are also hinting at that.  I would Hedge my bets until at least Sat night before throwing in the towel.

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The overall presentation actually improved a bit from 12z, but it still wasn't enough. The confluence was initially further south, and there was a lot more of that vorticity that ran ahead of the main vort (which seems suspect), and that acted to compress the height field, making the storm more suppressed initially. But then the main ULL piece moved out of the way a lot quicker, so the storm tried to make a comeback and was able to generate more height rises. The 500mb low actually ended up looking healthier at 96 hours on 00z than 108 on 12z...closed off at 500mb to our southeast instead of an open wave. 

 

Barely any precip reaches us verbatim, though. 

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I know the Euro is arguably the best model, but I feel like it has been off with almost every storm since the one in the beginning of Feb

It's still the best model, I'd rather it show a blizzard while other models show a miss than the other way around.

I can understand its not perfect especially with smaller scale systems but its usually on point with much larger storms.

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It's still the best model, I'd rather it show a blizzard while other models show a miss than the other way around.

I can understand its not perfect especially with smaller scale systems but its usually on point with much larger storms.

 

 

Euro being suppressed tonight is a problem....and a legit one. There's a reason its the best model...its because it handles complex blocking scenarios like this one very well (relatively speaking). Other models dont. That doesn't mean this run is correct though. We still have time to bring this north, but its running quite short.

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Euro being suppressed tonight is a problem....and a legit one. There's a reason its the best model...its because it handles complex blocking scenarios like this one very well (relatively speaking). Other models dont. That doesn't mean this run is correct though. We still have time to bring this north, but its running quite short.

 

The fact that it didn't really improve with any of the major players on the field tonight is a bit disconcerting. I was hoping to see it tick northward with the confluent flow and vorticity over New England around hour 60 like the GFS, NAM and Canadian have been doing for a few cycles.

 

The main vort closing off and becoming a huge cutoff low over the TN Valley makes things a lot worse also. 

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Euro being suppressed tonight is a problem....and a legit one. There's a reason its the best model...its because it handles complex blocking scenarios like this one very well (relatively speaking). Other models dont. That doesn't mean this run is correct though. We still have time to bring this north, but its running quite short.

I agree I would rather have it on my side, but it really hasn't been constant with this storm over the last 5 day and has been the SE outlier(but has come much further north over the last 2-3 days). Also it was way suppressed for days with the the inverted trough storm even though the coastal missed us by only 75 miles

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hate to sound like I'm rationalizing,but 12z euro runs are always way better at picking up/starting "trends"

 

 

i think that's what in general makes the euro good,

 

but it's also why i never get to excited or disappointed if it's similar to it's 12z run especially when it disagrees with the other models...i remember plenty of times where euro at 0z has been the last beacon of hope only for it to back down to other models at 12

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The fact that it didn't really improve with any of the major players on the field tonight is a bit disconcerting. I was hoping to see it tick northward with the confluent flow and vorticity over New England around hour 60 like the GFS, NAM and Canadian have been doing for a few cycles.

 

The main vort closing off and becoming a huge cutoff low over the TN Valley makes things a lot worse also. 

 

 

But look at the positioning/influence of the main ULL at later frames. Compare 84 hours at 00z with 96 hours at 12z. The ULL isn't pressing nearly as much on the height field. This is why after initially looking worse than 12z, the surface low actually ticks ever so slightly north of 12z with a much better presentation of the main storm itself at 96 hours at 00z vs 108 hours on 12z (at 500mb). 

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But look at the positioning/influence of the main ULL at later frames. Compare 84 hours at 00z with 96 hours at 12z. The ULL isn't pressing nearly as much on the height field. This is why after initially looking worse than 12z, the surface low actually ticks ever so slightly north of 12z with a much better presentation of the main storm itself at 96 hours at 00z vs 108 hours on 12z (at 500mb). 

 

 

Yes this is why the Euro made a late comeback in the 84-96 timeframe....but its still not very comforting that it did not make another move north out west....it made a huge move out west at 12z...and actually backed off at 00z...it made a late charge on 00z because it weakened the confluence over Quebec and NNE. But that is only a mild consolation right now.

 

There is still time for this trend better, but the 12z run has more pressure on it than Mariano Rivera did vs Luis Gonzalez in 2001. Lets hope that the outcome was more like Mariano Rivera's playoff record than my example on the 12z run. But I'm pretty discouraged by the trends in the midwest....but I will say that the blocking trends to the northeast were at least decent.

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