ATL: IDA - Models

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jaguars_22
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Re: ATL: INVEST 99L - Models

#441 Postby jaguars_22 » Wed Aug 25, 2021 7:04 pm

I’m almost wondering if the gfs is detecting 2 storms out of this mess and that may be why it’s having a hard time. Because a little later in the model run another storm forms in the same area and heads towards Texas! Also how can the gfs plow through a ULL?
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Re: ATL: INVEST 99L - Models

#442 Postby SoupBone » Wed Aug 25, 2021 7:05 pm

18Z Euro is right off the tip of western Cuba at 57 hours and consolidating.
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Re: ATL: INVEST 99L - Models

#443 Postby tolakram » Wed Aug 25, 2021 7:06 pm

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Re: ATL: INVEST 99L - Models

#444 Postby BobHarlem » Wed Aug 25, 2021 7:06 pm

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Re: ATL: INVEST 99L - Models

#445 Postby tolakram » Wed Aug 25, 2021 7:06 pm

jaguars_22 wrote:I’m almost wondering if the gfs is detecting 2 storms out of this mess and that may be why it’s having a hard time. Because a little later in the model run another storm forms in the same area and heads towards Texas! Also how can the gfs plow through a ULL?


That makes sense. This storm, and the gyre possibly spitting out more.
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Re: ATL: INVEST 99L - Models

#446 Postby SoupBone » Wed Aug 25, 2021 7:07 pm




Holy crap. If that were to verify, even as far west as Houston would feel this thing.
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Re: ATL: INVEST 99L - Models

#447 Postby tolakram » Wed Aug 25, 2021 7:08 pm

Regardless of development timing we still have remarkable model agreement for landfall within a 200 mile range. Not saying more shifts east aren't possible though.
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Re: ATL: INVEST 99L - Models

#448 Postby aspen » Wed Aug 25, 2021 7:10 pm

99L has exactly 48 hours between crossing over Cuba and making landfall in Louisiana. That’s a concerning amount of time and plenty to bomb out, especially if it’s coming in as a strong TS or a weak hurricane.

These runs give me vibes of Michael, Laura, and Delta all meshed together.
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Re: ATL: INVEST 99L - Models

#449 Postby tolakram » Wed Aug 25, 2021 7:11 pm

18z euro lines up very well with the HWRF

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Re: ATL: INVEST 99L - Models

#450 Postby sma10 » Wed Aug 25, 2021 7:13 pm

There seems to be several incredulous comments about how far eastward the models have shifted, but I think it is easily explained by the models sensing a more immediate and rapid development, which often tends to shift the track towards the right.
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Re: ATL: INVEST 99L - Models

#451 Postby tolakram » Wed Aug 25, 2021 7:13 pm

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Re: ATL: INVEST 99L - Models

#452 Postby SoupBone » Wed Aug 25, 2021 7:15 pm

So at 90 hours, the 18Z Euro is in the central GOM, and if you extrapolate its trajectory it looks like a central to SWLA Louisana landfall.
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Re: ATL: INVEST 99L - Models

#453 Postby tolakram » Wed Aug 25, 2021 7:15 pm

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Re: ATL: INVEST 99L - Models

#454 Postby Frank P » Wed Aug 25, 2021 7:16 pm

tolakram wrote:Regardless of development timing we still have remarkable model agreement for landfall within a 200 mile range. Not saying more shifts east aren't possible though.

Both the 18z HWRF and HMON model runs had huge shifts east from their 12z run…
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Re: ATL: INVEST 99L - Models

#455 Postby sma10 » Wed Aug 25, 2021 7:17 pm

aspen wrote:99L has exactly 48 hours between crossing over Cuba and making landfall in Louisiana. That’s a concerning amount of time and plenty to bomb out, especially if it’s coming in as a strong TS or a weak hurricane.

These runs give me vibes of Michael, Laura, and Delta all meshed together.


I wrote this earlier, but the true analog, according to the current modeling at least, is Camille (W. Carib development in Aug, swing around W tip of Cuba, rapid strengthening)
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Re: ATL: INVEST 99L - Models

#456 Postby tolakram » Wed Aug 25, 2021 7:19 pm

Frank P wrote:
tolakram wrote:Regardless of development timing we still have remarkable model agreement for landfall within a 200 mile range. Not saying more shifts east aren't possible though.

Both the 18z HWRF and HMON model runs had huge shifts east from their 12z run…


I see that as a correction, not a shift. They both had landfalls well west of every other model. My opinion anyway. :)

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Re: ATL: INVEST 99L - Models

#457 Postby tolakram » Wed Aug 25, 2021 7:23 pm

Last frame of the 18z euro
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Re: ATL: INVEST 99L - Models

#458 Postby bella_may » Wed Aug 25, 2021 7:26 pm

Sorry, years of posting here and I still don’t know how to properly embed a tweet. But the GFS ensembles have significantly went east https://twitter.com/anthonymweather/sta ... 03202?s=21
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Re: ATL: INVEST 99L - Models

#459 Postby captainbarbossa19 » Wed Aug 25, 2021 7:27 pm

I see all these models as generally not very helpful until we have a defined center. These models are having huge swings considering we were just talking about a southern or central Mexico landfall the other day. Now we are talking about SE Louisiana or Mississippi? Crazy.
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Re: RE: Re: ATL: INVEST 99L - Models

#460 Postby jlauderdal » Wed Aug 25, 2021 7:30 pm

captainbarbossa19 wrote:I see all these models as generally not very helpful until we have a defined center. These models are having huge swings considering we were just talking about a southern or central Mexico landfall the other day. Now we are talking about SE Louisiana or Mississippi? Crazy.
There is decent agreement in houston to new orleans,more likely a LA storm, i would start preps tomorrow in LA, gas for the genny first.
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