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March Med/Long Range Disco


WinterWxLuvr

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FWIW - 21z SREFs mean has the h5 energy in IA with nice slight ridge over the west centered over UT/E ID/W MT at 87 hrs

I don't suppose those are very useful at this range, but they are east with both features, the central vortex and the ne ull.

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I do want to say though... here's some evidence of how the Euro has kicked butt on this storm so far:

 

 

 

From 

SW/Central/SE VA Winter 2012-13 Thread

How the heck can something kick butt if the storm hasn't even happened yet? :rolleyes:

Just because it's been showing that kind of a scenario doesn't make it right!!!

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How the heck can something kick butt if the storm hasn't even happened yet? :rolleyes:

Just because it's been showing that kind of a scenario doesn't make it right!!!

Kenny, you've been around the boards longer than me I think. The snowiest solution is always right until proven otherwise. Right now the euro control is the frontrunner.

Extrapolated nam is up next and the gfs shortly after will only be tossed if it doesnt show what we want. Weenies have no rules or boundries. It's like permanently being 16.

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If it does turn out right (which I am thinking right now that it likely will) then it will have kicked major butt on the storm.

Do you have any reasoning? I'm not trying to be rude or anything - but a gut feeling doesn't mean much when it comes to the atmosphere. I still think there are multiple solutions on the table and it could easily be a whiff for us. 

This is where we get into trouble as a forum - we start trying to congratulate models before it's even within 3-days. 

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If it does turn out right (which I am thinking right now that it likely will) then it will have kicked major butt on the storm.

With a storm seemingly so sensitive to a whole range of factors, declaring a model likely to be right at 5 days is going to be met with strong criticism, as it should.

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Do you have any reasoning? I'm not trying to be rude or anything - but a gut feeling doesn't mean much when it comes to the atmosphere. I still think there are multiple solutions on the table and it could easily be a whiff for us.

This is where we get into trouble as a forum - we start trying to congratulate models before it's even within 3-days.

LOL, I think we said pretty much the same thing at the same time.

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This is random but I was talking to my parents about the potential storm and my dad always gives me a hard time about the weather and says things like, "just look out the window." etc etc. But this time, and remember he doesn't know much about the weather, he randomly says, "what's the EURO say? I'd go with that scenario." 

 

My jaw dropped and I was like, "Whaattt?" How the heck do you know about the EURO. He said they talk about the models all the time on tv. Guess I don't watch much tv anymore. haha.

 

So lock it in, my dad says the EURO wins. LOL! 

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Based on everything I've seen today, a miss is still more likely with a hit gaining points every 6 hours. The setup is tricky and fraught with peril. All jokes aside, all weenies need to accept that fact. More can go wrong that right and will remain that way until gametime if there even is a gametime. This isn't a ss vort with a block. Nothing will come "easy".

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Theres three different scenarios. The ULL has more latitude and just bowls its way east under the block like EURO, the shortwave heads a bit farther south, but gets phased by a piece of the northern branch like the 12z GFS, or the vort heads south but misses the phase like 18z GFS. 

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The differences between the position of the closed 500 low on the 18z GFS versus the 00z NAM is quite large. The NAM is in SE ND at 6z Wednesday while the GFS is in central Nebraska.

Edit: Also, comparing the 12z GFS to the 00z NAM, it's even more of a disparity with the 12z GFS being in Northeast Kansas.

What I am taking away from that is the trend is slower, which I would think "should" translate into letting the ULL over the Maine area to move/washout. I believe Bernie Rayno was hinting that slower was better in this case.

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The differences between the position of the closed 500 low on the 18z GFS versus the 00z NAM is quite large. The NAM is in SE ND at 6z Wednesday while the GFS is in central Nebraska.

Edit: Also, comparing the 12z GFS to the 00z NAM, it's even more of a disparity with the 12z GFS being in Northeast Kansas.

What I am taking away from that is the trend is slower, which I would think "should" translate into letting the ULL over the Maine area to move/washout. I believe Bernie Rayno was hinting that slower was better in this case.

but too slow is bad

I recall at least one, and pretty sure there were two, systems this year that slower was better but then it slowed too much and a GL low showed up on the scene

a tough 100 hrs to come on this one

I just hope it makes up its mind early on so I don't waste my time with it

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but too slow is bad

I recall at least one, and pretty sure there were two, systems this year that slower was better but then it slowed too much and a GL low showed up on the scene

a tough 100 hrs to come on this one

I just hope it makes up its mind early on so I don't waste my time with it

The NAM is slowing things down. Most people in the know here don't place any stock in the NAM at that range, but it does raise an interesting question. Does slower make an earlier phase more likely? I'm sure slower is probably better wrt the ne ull.

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Bored, my friend.  And anxious...

For sure...aren't we all!  If the 18Z GFS was at least in the ballpark of the 12Z solutions, we'd all be breathing a bit easier.  But that really threw a monkey wrench into things after such good agreement in all the 12Z models, and after the GFS itself trended toward what the Euro was showing.

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This times about a billion.  If we assimilated no observations into the 18z assimilation, it would show the EXACT same solution as 12z.  That's how it works, we don't start from scratch, we combined a model state with observations.  For 18z, we have a ton of observations, notably satellite-based, surface and aircraft based sensors (domenstic passenger and cargo planes from various vendors).

 

A 120-h forecast from 18z will almost always be better than a 126-h forecast from 12z.

 

Great info. Thanks for posting it! Is the model run with the same resolution on all model runs?

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