ATL: DEBBY - Models

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Michele B
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Re: ATL: INVEST 97L - Models

#21 Postby Michele B » Thu Aug 01, 2024 11:05 am

chaser1 wrote::think: Just another unknown caveat to throw into the mix of things. It might be interesting to see which (if any) models suggest faster development or RI in terms of how it might relate to the eventual storm track. Meaning, if there are already indications of a COL or short-term breakdown of steering in the S.E. GOM and any particular model suggest significant deepening to occur around that same time, such a quick fall in surface pressures could somewhat mitigate or at least further delay any onset of forward motion towards the projected weakness in the ridge. Such temporary stalls within quickly organizing systems can be apt to impact forecast point verification by hours. That might not seem like much, but it might just impact the timing 2-3 days later whether slipping through a weakness or just missing a retreating trough and getting blocked by the rebuilding ridge. Timing is everything but right now land will play the biggest factor there.


EVERYTHING you said is probably the reason the models are so scattered: Some saying west toward LA, some panhandle, some SW FL. Some recurve.....

The models are still only "models," aren't they? They still don't seem to know every variable that impacts what will steer a storm, or feed it, or kill it. Still so much to learn about these beasts.
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Re: ATL: INVEST 97L - Models

#22 Postby IcyTundra » Thu Aug 01, 2024 11:05 am

mpic wrote:Any time the models show that it will enter the GOM this time of year, I get nervous in the Houston area. My damage from Beryl should be completed this weekend, but I had to spend the money that I had saved up for a generator on my deductible. Strong -removed- going on at my house lol.


I think we’re going to be fine here it would really have to stall for a while in the Gulf for it to come here.
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Re: ATL: INVEST 97L - Models

#23 Postby toad strangler » Thu Aug 01, 2024 11:06 am

BobHarlem wrote:Over water again, moving very slowly off Brunswick, GA/St. Simon Island


Just meanders extremely slowly from there straddling the GA / SC Coast all the way through 132 hours so far
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Re: ATL: INVEST 97L - Models

#24 Postby toad strangler » Thu Aug 01, 2024 11:08 am

12z CMC landfalls in nearly same spot as 12z ICON and 12z GFS but moving much faster and stays inland over GA into SC
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Re: ATL: INVEST 97L - Models

#25 Postby tolakram » Thu Aug 01, 2024 11:09 am

90 hour model roundup

Image

Image

Image

Image
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Re: ATL: INVEST 97L - Models

#26 Postby BobHarlem » Thu Aug 01, 2024 11:14 am

12z getting further north than 6z, close to SC/NC here. I think a lot rides on how quickly it comes in into the Gulf and if it can get over land before the slowdown occurs. Looks like it may stay offshore at least.


Image
Last edited by BobHarlem on Thu Aug 01, 2024 11:15 am, edited 2 times in total.
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Re: ATL: INVEST 97L - Models

#27 Postby chaser1 » Thu Aug 01, 2024 11:14 am

At 138 hr's it looks like the ridging begins to break down north of the storm. If so, it should start progressing slowly NE (meaning no crazy loop-de-loops LOL)
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Re: ATL: INVEST 97L - Models

#28 Postby BobHarlem » Thu Aug 01, 2024 11:19 am

Starts heading north toward Morehead City, NC here
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And landfall Morehead city
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exits out gets in the Atlantic again after traversing the sounds up to Nags Head, but really doesn't get north of the NC latitude through late Sunday at least before it exits quickly northeast.

I suspect 18z will change again, too much uncertainty in the near term.
Last edited by BobHarlem on Thu Aug 01, 2024 11:41 am, edited 2 times in total.
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Re: ATL: INVEST 97L - Models

#29 Postby chris_fit » Thu Aug 01, 2024 11:29 am

Decent uptick in intensity on the 12z GEFS and mean looks little to the left towards the panhandle.
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Re: ATL: INVEST 97L - Models

#30 Postby Teban54 » Thu Aug 01, 2024 11:37 am

chris_fit wrote:Decent uptick in intensity on the 12z GEFS and mean looks little to the left towards the panhandle.

GFS operational shifting east while GEFS shifting west was not something I expected...
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Re: ATL: INVEST 97L - Models

#31 Postby LarryWx » Thu Aug 01, 2024 11:45 am

12Z UKMET: slow mover (huge rainfall potential) that moves NNE with a landfall FL panhandle; turns E through N FL and then deepens offshore

NEW TROPICAL CYCLONE FORECAST TO DEVELOP AFTER 90 HOURS
FORECAST POSITION AT T+ 90 : 27.9N 85.9W

LEAD CENTRAL MAXIMUM WIND
VERIFYING TIME TIME POSITION PRESSURE (MB) SPEED (KNOTS)
-------------- ---- -------- ------------- -------------
1200UTC 05.08.2024 96 28.9N 86.2W 1010 33
0000UTC 06.08.2024 108 29.2N 85.5W 1009 29
1200UTC 06.08.2024 120 31.2N 85.1W 1009 29
0000UTC 07.08.2024 132 30.1N 83.8W 1006 26
1200UTC 07.08.2024 144 30.8N 82.5W 1003 34
0000UTC 08.08.2024 156 31.0N 80.4W 997 46
1200UTC 08.08.2024 168 30.8N 79.5W 994 43
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Re: ATL: INVEST 97L - Models

#32 Postby DunedinDave » Thu Aug 01, 2024 11:47 am

Are any models showing a stall off the Fla west coast anymore like the GFS did yesterday? Seems like that scenario has lost steam.
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Re: ATL: INVEST 97L - Models

#33 Postby Teban54 » Thu Aug 01, 2024 11:51 am

DunedinDave wrote:Are any models showing a stall off the Fla west coast anymore like the GFS did yesterday? Seems like that scenario has lost steam.

Right now, the 12z GFS, CMC and ICON all agree on the system slowly but steadily moving NE towards the Carolinas.

However, I wouldn't say a stall in FL or the Gulf is off the table yet. After all, 0z Euro showed the same evolution as 0z and 6z GFS with a stall, albeit much weaker. Better wait for consistency with a few runs.
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Re: ATL: INVEST 97L - Models

#34 Postby IcyTundra » Thu Aug 01, 2024 11:51 am

DunedinDave wrote:Are any models showing a stall off the Fla west coast anymore like the GFS did yesterday? Seems like that scenario has lost steam.


Multiple GEFS members show a stall near or along the west coast of Florida.
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Re: ATL: INVEST 97L - Models

#35 Postby Blown Away » Thu Aug 01, 2024 11:52 am

Image

12z GEFS more active and more spread near tip of Florida...
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Re: ATL: INVEST 97L - Models

#36 Postby Stratton23 » Thu Aug 01, 2024 12:00 pm

( my fox hurricane is the site for seeing these ) but some of the computer models like the tabm, tabd and tabs suggest a loop near florida before making a SW dive toward the yucatan lol, there are a ton of scenarios still on the table with this one
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Re: ATL: INVEST 97L - Models

#37 Postby IcyTundra » Thu Aug 01, 2024 12:01 pm

Operational GFS is on the eastern end of the GEFS guidance. Most GEFS members show a stall near or over Florida a week from now. Lots of uncertainty with this one.
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Re: ATL: INVEST 97L - Models

#38 Postby BobHarlem » Thu Aug 01, 2024 12:03 pm

12z GEFS Ensembles (so far)

Image
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Re: ATL: INVEST 97L - Models

#39 Postby rockice » Thu Aug 01, 2024 12:15 pm

BobHarlem wrote:12z GEFS Ensembles (so far)

https://i.imgur.com/bU9cr1G.gif
.

Also, quite a few more members in the GOM to the west
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Re: ATL: INVEST 97L - Models

#40 Postby DunedinDave » Thu Aug 01, 2024 12:21 pm

Teban54 wrote:
DunedinDave wrote:Are any models showing a stall off the Fla west coast anymore like the GFS did yesterday? Seems like that scenario has lost steam.

Right now, the 12z GFS, CMC and ICON all agree on the system slowly but steadily moving NE towards the Carolinas.

However, I wouldn't say a stall in FL or the Gulf is off the table yet. After all, 0z Euro showed the same evolution as 0z and 6z GFS with a stall, albeit much weaker. Better wait for consistency with a few runs.


Gotcha. Thanks for the input. Appreciated. Hoping a stall doesn’t play out.
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