ATL: HANNA - Remnants - Discussion

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wxman57
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Re: ATL: INVEST 91L - Discussion

#101 Postby wxman57 » Wed Jul 22, 2020 9:13 am

Winds still quite light across the Gulf. Had to go back to a 12Z image to capture all obs near the weak low center. I'm pretty sure we'll have a depression by tomorrow. Definitely no TS winds out there now, though. Not much of a gradient yet.

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Re: ATL: INVEST 91L - Discussion

#102 Postby GCANE » Wed Jul 22, 2020 9:14 am

Aric Dunn wrote:I mean just says it all..

I say TS by the time recon gets there.. we already had near TS winds out there yesterday and overnight..

https://i.ibb.co/64d3JZY/CODNEXLAB-GOES-East-subregional-E-Gulf-Coast-02-13-56-Z-20200722-map-plot-35-1n-4-150.gif



Inflow looks better than Gonzo's
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Re: ATL: INVEST 91L - Discussion

#103 Postby Aric Dunn » Wed Jul 22, 2020 9:19 am

Too bad it is in that part of the gulf where surface obs are sparse and too far away to give us accurate data.
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Re: ATL: INVEST 91L - Discussion

#104 Postby Steve » Wed Jul 22, 2020 9:20 am

I agree with wxman. I'm a hair less bullish on this today than I was yesterday, as it seems that development is occurring farther west as time goes on. I still expect it to become classified by tomorrow, but I'm not sure what the top end is going to be - maybe 40/45mph offshore or less likely maybe only a TD because it's likely to run out of time before getting super organized. Could be some rain, so I'm going to look into that. There's some new model info, so I'll post that in models thread.
Last edited by Steve on Wed Jul 22, 2020 9:20 am, edited 1 time in total.
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Re: ATL: INVEST 91L - Discussion

#105 Postby Dylan » Wed Jul 22, 2020 9:20 am

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Re: ATL: INVEST 91L - Discussion

#106 Postby gfsperpendicular » Wed Jul 22, 2020 9:23 am

Does this currently qualify as "organized deep convection"? I guess I don't completely understand that requirement.
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Re: ATL: INVEST 91L - Discussion

#107 Postby Jr0d » Wed Jul 22, 2020 9:28 am

Given how intense the squalls were in the Florida Keys yesterday, I think 91L will be able to pull itself together and be classified before making landfall, though not exactlyba scientific assessment. The low is there, the spin is there, there is still plenty of time over bathtub water before making it to Texas. Regardless of the classification it will bring heavy rain and intense squalls to Texas.
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Re: ATL: INVEST 91L - Discussion

#108 Postby HurricaneBrain » Wed Jul 22, 2020 9:29 am

Clear spin and maintaining convective burst around the center.
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Last edited by HurricaneBrain on Wed Jul 22, 2020 9:32 am, edited 1 time in total.
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Re: ATL: INVEST 91L - Discussion

#109 Postby GCANE » Wed Jul 22, 2020 9:32 am

Three upper-level vorts around this:
1) South TX
2) Yucatan
3) FL

A little streamer over this connecting Yucatan and FL.
However, its dissipating.
That will open up the lid for greater updraft development.
Those vorts are ideally positioned to create well defined outflow channels.

Also, as it tracks west it will tap into EPAC high-TPW air.
CAPE in the BOC is currently 4000.

If the lid comes off, it could quickly develop a very strong feeder band.
Heavy convection would open it up.

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Re: ATL: INVEST 91L - Discussion

#110 Postby EquusStorm » Wed Jul 22, 2020 9:34 am

Neat. Looks like we're certainly in the opening act. Might be tomorrow before it really gets crankin' but the Gulf can certainly surprise
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Re: ATL: INVEST 91L - Discussion

#111 Postby GCANE » Wed Jul 22, 2020 9:35 am

HurricaneBrain wrote:Clear spin and maintaining convective burst around the center.
https://im7.ezgif.com/tmp/ezgif-7-4180dc3b70a5.gif


Lid's coming off.
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Re: ATL: INVEST 91L - Discussion

#112 Postby wxman57 » Wed Jul 22, 2020 9:36 am

gfsperpendicular wrote:Does this currently qualify as "organized deep convection"? I guess I don't completely understand that requirement.


No, it's not very organized.
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Re: ATL: INVEST 91L - Discussion

#113 Postby Jr0d » Wed Jul 22, 2020 9:39 am

gfsperpendicular wrote:Does this currently qualify as "organized deep convection"? I guess I don't completely understand that requirement.


It is not organized convection, there is some deep convection associated with it. Even though I am well east of the low, I am still getting occasional squalls that are starting to look more like rain bands.
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Re: ATL: INVEST 91L - Discussion

#114 Postby GCANE » Wed Jul 22, 2020 9:42 am

Tower, just SE of the CoC.
Good lightning, good helicity, and good outflow to the NW.

Image

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Re: ATL: INVEST 91L - Discussion

#115 Postby MGC » Wed Jul 22, 2020 9:43 am

91L looks like a rerun of 90L....might close off near Texas coast. No need for recon today IMO.....MGC
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Re: ATL: INVEST 91L - Discussion

#116 Postby HurricaneBrain » Wed Jul 22, 2020 9:48 am

91L has much more time over warm Gulf waters and a much higher chance of development than 90L had. Recon would help assist the globals with critical data. Not that comparable.
MGC wrote:91L looks like a rerun of 90L....might close off near Texas coast. No need for recon today IMO.....MGC
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Re: ATL: INVEST 91L - Discussion

#117 Postby GCANE » Wed Jul 22, 2020 9:53 am

Classic
When is Recon going to arrive?

Image
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Re: ATL: INVEST 91L - Discussion

#118 Postby dantonlsu » Wed Jul 22, 2020 9:54 am

GCANE wrote:Classic
When is Recon going to arrive?

https://i.imgur.com/bF1sSNS.gif



Can you explain what this is inferring?
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Re: ATL: INVEST 91L - Discussion

#119 Postby GCANE » Wed Jul 22, 2020 9:55 am

dantonlsu wrote:
GCANE wrote:Classic
When is Recon going to arrive?

https://i.imgur.com/bF1sSNS.gif



Can you explain what this is inferring?


Classic TD wind-field signature based on IR Satellite analysis.
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Re: ATL: INVEST 91L - Discussion

#120 Postby Ubuntwo » Wed Jul 22, 2020 10:02 am

GCANE wrote:
dantonlsu wrote:
GCANE wrote:Classic
When is Recon going to arrive?

https://i.imgur.com/bF1sSNS.gif



Can you explain what this is inferring?


Classic TD wind-field signature based on IR Satellite analysis.

That windfield analysis, as far as I've seen, always displays a "closed" low. It's intended to display the extent and position of certain wind speeds, nothing more.
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