
ATL: GONZALO - Remnants - Discussion
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- ScottNAtlanta
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Re: ATL: INVEST 99L - Discussion
Models more bullish than earlier today


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Re: ATL: INVEST 99L - Discussion
Verification scores! Better correlation with an upgrade from 80% than 60%...
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Re: ATL: INVEST 99L - Discussion
They upgraded the TWO instead of waiting for marine and aviation interests - it certainly has a classic CV appearance...
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- EquusStorm
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Re: ATL: INVEST 99L - Discussion
Got some Beryl vibes with this, though not expecting anything quite as strong
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- MGC
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Re: ATL: INVEST 99L - Discussion
Yup, 99L likely to get upgraded later today. Looking pretty healthy on Sat loop. Some low level dry air lurking about....but don't see much shear out ahead of 99L for the next couple of days. Should slowly intensify and become a TS eventually IMO......MGC
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Re: ATL: INVEST 99L - Discussion
Apparently they are just waiting on Dvorak numbers to catch up. Doesn’t make much sense to me if there’s ASCAT available already.
https://twitter.com/toddkimberlain/status/1285597547655057408
https://twitter.com/toddkimberlain/status/1285597547655057408
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Re: ATL: INVEST 99L - Discussion

LLC = check
deep convection = check
This thing is a tropical cyclone!
Probably will be a respectable one.
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Re: ATL: INVEST 99L - Discussion
https://twitter.com/cyclonicwx/status/1285569042787569664
https://twitter.com/webberweather/status/1285554980552876032
https://twitter.com/webberweather/status/1285565130907033600
https://twitter.com/webberweather/status/1285569499585032192
https://twitter.com/cyclonicwx/status/1285570490577428480
https://twitter.com/webberweather/status/1285554980552876032
https://twitter.com/webberweather/status/1285565130907033600
https://twitter.com/webberweather/status/1285569499585032192
https://twitter.com/cyclonicwx/status/1285570490577428480
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CVW / MiamiensisWx / Shell Mound
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- StPeteMike
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Re: ATL: INVEST 99L - Discussion
One thing I’ll be watching is the wave just coming off of Africa. Definitely has some circulation, just mid-level right now, but it’s a larger system compared to 99L. If the wave manages to get itself together as well, it could suck up much of 99L moisture and make it more prone to any shear or dry air ahead of it.
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Re: ATL: INVEST 99L - Discussion
Here's your organized deep convection.
Continuous and just about on top of the CoC.
A new tower is beginning to fire and may wrap around.


Continuous and just about on top of the CoC.
A new tower is beginning to fire and may wrap around.


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- EquusStorm
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Re: ATL: INVEST 99L - Discussion
We will continue breaking 2005's earliest-storm records if this is named pretty quickly, but hey, at least it's finally a deep MDR storm like all the 2005 storms thus far. Though I'm pretty sure we could fit 2020's total ACE so far several times over into just Dennis or Emily
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Not a meteorologist, in fact more of an idiot than anything. You should probably check with the NHC or a local NWS office for official information.
Re: ATL: INVEST 99L - Discussion
Sciencerocks wrote:https://imagizer.imageshack.com/img924/2241/lHnn8X.gif
LLC = check
deep convection = check
This thing is a tropical cyclone!
Probably will be a respectable one.
This is definitely in my opinion 100% at least a Tropical Depression. Don’t know what the NHC is waiting on?
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Re: ATL: INVEST 99L - Discussion
TheStormExpert wrote:Sciencerocks wrote:https://imagizer.imageshack.com/img924/2241/lHnn8X.gif
LLC = check
deep convection = check
This thing is a tropical cyclone!
Probably will be a respectable one.
This is definitely in my opinion 100% at least a Tropical Depression. Don’t know what the NHC is waiting on?
Persistence, persistence, persistence. This will probably go straight to TS Gonzalo by 21:00 UTC.
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CVW / MiamiensisWx / Shell Mound
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Re: ATL: INVEST 99L - Discussion
Shell Mound wrote:TheStormExpert wrote:Sciencerocks wrote:https://imagizer.imageshack.com/img924/2241/lHnn8X.gif
LLC = check
deep convection = check
This thing is a tropical cyclone!
Probably will be a respectable one.
This is definitely in my opinion 100% at least a Tropical Depression. Don’t know what the NHC is waiting on?
Persistence, persistence, persistence. This will probably go straight to TS Gonzalo by 21:00 UTC.
24 hours of persistent convection = Check.
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Space & Atmospheric Physicist, Embry-Riddle Aeronautical University,
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If there is nothing before... then just ask

Space & Atmospheric Physicist, Embry-Riddle Aeronautical University,
I believe the sky is falling...
Re: ATL: INVEST 99L - Discussion
Can someone tell me why this storm is expected to weaken by this weekend? What is the NHC seeing that will cause that?
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Re: ATL: INVEST 99L - Discussion
Shell Mound wrote:TheStormExpert wrote:Sciencerocks wrote:https://imagizer.imageshack.com/img924/2241/lHnn8X.gif
LLC = check
deep convection = check
This thing is a tropical cyclone!
Probably will be a respectable one.
This is definitely in my opinion 100% at least a Tropical Depression. Don’t know what the NHC is waiting on?
Persistence, persistence, persistence. This will probably go straight to TS Gonzalo by 21:00 UTC.
Persistance IS key, and should be key.... however NO more - NO less then should apply to hybrid "home-grown" North Atlantic lows.
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Andy D
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- EquusStorm
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Re: ATL: INVEST 99L - Discussion
Yeah persistence didn't mean much for some of our brief systems the last couple years, Olga existed for three advisories
I still think it's a little harder for a pure MDR system to be upgraded than even a brief baroclinic assisted system, lots of really brief high latitude storms recently
I still think it's a little harder for a pure MDR system to be upgraded than even a brief baroclinic assisted system, lots of really brief high latitude storms recently
Last edited by EquusStorm on Tue Jul 21, 2020 11:14 am, edited 1 time in total.
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Colors of lost purpose on the canvas of irrelevance
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Not a meteorologist, in fact more of an idiot than anything. You should probably check with the NHC or a local NWS office for official information.
Re: ATL: INVEST 99L - Discussion
EquusStorm wrote:Yeah persistence didn't mean much for some of our brief systems the last couple years, Olga existed for three advisories
They throw persistence out the window when there's recon and it's a land threat in the short term.
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Kendall -> SLO -> PBC
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- EquusStorm
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Re: ATL: INVEST 99L - Discussion
That's fair, though it took forever to operationally upgrade similarly land-threatening Bill in 2015. But I disgress lol. I think every storm of 2019 deserved its classification, just a lot that decided to not last too long
Last edited by EquusStorm on Tue Jul 21, 2020 11:19 am, edited 2 times in total.
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Colors of lost purpose on the canvas of irrelevance
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