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December 26-27 Storm Threat


Baroclinic Zone

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Someone mentioned in the NYC thread that even though there was an error in the 12z initialization... that has nothing to do with the 18z initialization

I don't know about that.

One thing always say is beware of gulf lows. They can be explosive (see baroclnic instability post in the main thread). That said, I have a hard time with these solutions. If the 18z gfs holds serve, it will open my eye a little more, but it may not be until after 00z before we figure out everything. I just need more support for such an insane solution. You have the euro and ensembles at 60-72 hrs out with a solution east of the BM. That is tough to beat and would be a bad fail if this went onto CHH. While these lows can be explosive, it looks like the NAM tapped the egg nog early.

I never rule out anything, just looking at this from a met standpoint.

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only in 2010 the year of the cosmic dildo swat could we be F'd with so badly. as we end the year models trend in 9'th inning toward slower closer bomb and HPC says toss them (cept the sref mean which they said ///don't toss) .

with that said i am alot happier that these models didn't go way OTS and then ....say ....ya well we should toss these .

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I don't know about that.

One thing always say is beware of gulf lows. They can be explosive (see baroclnic instability post in the main thread). That said, I have a hard time with these solutions. If the 18z gfs holds serve, it will open my eye a little more, but it may not be until after 00z before we figure out everything. I just need more support for such an insane solution. You have the euro and ensembles at 60-72 hrs out with a solution east of the BM. That is tough to beat and would be a bad fail if this went onto CHH. While these lows can be explosive, it looks like the NAM tapped the egg nog early.

I never rule out anything, just looking at this from a met standpoint.

Is this the hardest forecast you have ever made?

The crappy thing is that the GFS cannot possibly show a better run than the last one :arrowhead:.. so it WILL be worse

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I don't know about that.

One thing always say is beware of gulf lows. They can be explosive (see baroclnic instability post in the main thread). That said, I have a hard time with these solutions. If the 18z gfs holds serve, it will open my eye a little more, but it may not be until after 00z before we figure out everything. I just need more support for such an insane solution. You have the euro and ensembles at 60-72 hrs out with a solution east of the BM. That is tough to beat and would be a bad fail if this went onto CHH. While these lows can be explosive, it looks like the NAM tapped the egg nog early.

I never rule out anything, just looking at this from a met standpoint.

Perhaps by Tuesday morning. I remember an old Met I used to listen to say that lows coming at us from out of the gulf could be as tough as a hurricane to pin a track on.

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Is this the hardest forecast you have ever made?

Luckily, I don't have to..lol.

I've never seen such insanity. March '01 was wild, but all these solutions in the same day, less than 72 hrs out and in the year 2010 are amazing to me. Literally all you can say, is WTF. I don't know if it has to do with the initialization scheme ( we should not be able to blame everything on that), or what. I just can't buy this exotic solution right now.

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Luckily, I don't have to..lol.

I've never seen such insanity. March '01 was wild, but all these solutions in the same day, less than 72 hrs out and in the year 2010 are amazing to me. Literally all you can say, is WTF. I don't know if it has to do with the initialization scheme ( we should not be able to blame everything on that), or what. I just can't buy this exotic solution right now.

I dunno... the HPC is saying the Euro's data assimilation and initialization was superior to the GFS today. Well no sh*t... it always is. With no bad data I don't know how this is any different than usual?

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Luckily, I don't have to..lol.

I've never seen such insanity. March '01 was wild, but all these solutions in the same day, less than 72 hrs out and in the year 2010 are amazing to me. Literally all you can say, is WTF. I don't know if it has to do with the initialization scheme ( we should not be able to blame everything on that), or what. I just can't buy this exotic solution right now.

Does the 00z GFS last night showing the a similar solution and the Euro showing the same solution a couple days ago have any merit?

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from main by a met

[/quote name=chris87' timestamp='1293223679' post='172110]

the 18z NAM would have been initialized with any new observations from the past 3 hours (i don't know the actual assimilation cycle off hand, it may be all new observations since 12z). the first guess field comes from the 6-hour forecast of the 12z NAM.

it does use GFS as lateral boundary conditions, but HPC noted the discrepancies [i'm not comfortable enough calling them initialization errors...just because an assimilation system, in this case the one used to initialize the NAM and GFS, resolved features different than the Euro (although likely a better assimilation system on average) doesn't make it an initialization error, for sure] were over the Midwest, or within the NAM domain, so the GFS lateral boundary conditions shouldn't be causing any problems

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I dunno... the HPC is saying the Euro's data assimilation and initialization was superior to the GFS today. Well no sh*t... it always is. With no bad data I don't know how this is any different than usual?

You mean would this have occurred normally? That's why I mentioned we can't blame everything on that.

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You mean would this have occurred normally? That's why I mentioned we can't blame everything on that.

Yeah... I really want to hear more about the errors the NCEP is talking about. You'd always take the Euro's initialization over the GFS because it is superior. But at 00h/06h I don't see huge differences between the two.

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Does the 00z GFS last night showing the a similar solution and the Euro showing the same solution a couple days ago have any merit?

Well the 00z gfs seemed within reach imo. The euro from 2 days ago with it closed off of Norfolk VA seemed far fetched and I wouldn't buy that right now. However, I didn't think 00z gfs was unresonable.

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