ATL: ISAAC - Extratropical - Discussion

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ChrisH-UK
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Re: ATL: ISAAC - Hurricane - Discussion

#101 Postby ChrisH-UK » Sun Sep 29, 2024 12:42 pm

Isaac this evening, CIMSS Real time intensity product is having it as a tropical storm speeds now.

https://tropic.ssec.wisc.edu/real-time/ ... ry_IR.html

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Source - https://col.st/JqxLx

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WaveBreaking
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Re: ATL: ISAAC - Hurricane - Discussion

#102 Postby WaveBreaking » Sun Sep 29, 2024 12:53 pm

Cyclenall wrote:
AnnularCane wrote:Wow, did those reds and yellows really just show up out of nowhere?

No and I'd like to know why Band 7 does that to imagery, its really offbeat and chaotic.


Band 7 is very sensitive to diurnal heating, which makes cloud top temps appear to spike during the daytime.
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Re: ATL: ISAAC - Hurricane - Discussion

#103 Postby AnnularCane » Sun Sep 29, 2024 1:01 pm

WaveBreaking wrote:
Cyclenall wrote:
AnnularCane wrote:Wow, did those reds and yellows really just show up out of nowhere?

No and I'd like to know why Band 7 does that to imagery, its really offbeat and chaotic.


Band 7 is very sensitive to diurnal heating, which makes cloud top temps appear to spike during the daytime.



Too bad because it would have been kind of cool if he actually did that.
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Re: ATL: ISAAC - Extratropical - Discussion

#104 Postby Teban54 » Mon Sep 30, 2024 10:01 am

Goodbye, Isaac! While not another destructive I storm, you were still a big over-achiever similar in spirit to the other I names.

BULLETIN
Post-Tropical Cyclone Isaac Advisory Number 19
NWS National Hurricane Center Miami FL AL102024
300 PM GMT Mon Sep 30 2024

...ISAAC BECOMES A POST-TROPICAL CYCLONE...
...THIS IS THE LAST ADVISORY...
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Re: ATL: ISAAC - Extratropical - Discussion

#105 Postby Travorum » Mon Sep 30, 2024 10:21 am

See you in 2030, Isaac. In a testament to the quality-over-quantity year 2024 is shaping up to be, the sole subtropical spinup to date this year was a massive overperformer. Isaac was first forecasted to peak as a 60kt TS and was never forecast to be a Category 2 hurricane until it quickly strengthened to a 90kt peak. Isaac ultimately generated 7.83 ACE over its 4.5 day lifespan.
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Re: ATL: ISAAC - Extratropical - Discussion

#106 Postby Teban54 » Mon Sep 30, 2024 10:24 am

Travorum wrote:Isaac was first forecasted to peak as a 60kt TS and was never forecast to be a Category 2 hurricane until it quickly strengthened to a 90kt peak.

Isaac was also not really expected to form in the first place. It was only given a 40/40 chance of development just before genesis occurred, and model support was probably even lower than that. The TWO preceding the 40/40 was only 10/20, which means that TWO basically missed an entire Category 2 hurricane.

Travorum wrote:Isaac ultimately generated 7.83 ACE over its 4.5 day lifespan.

FYI, this is more ACE than Helene generated.
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