NATL: MELISSA - Aftermath - Discussion: Josh Morgerman video of Melissa is up

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chaser1
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Re: NATL: MELISSA - Hurricane - Discussion

#1181 Postby chaser1 » Sun Oct 26, 2025 11:18 pm

Jr0d wrote:
Sciencerocks wrote:This is the most impressive cat4 I've ever seen and most amazingly the recon says that is what it is. :spam: Can't argue with direct measurement but it is a puzzle of ones mind.

But I will stay up another 3-4 hours to catch at least a pass to see if current satellite trends finally catch up with surface realities. ;)


I am definitely staying up to see what recon finds.

It does seem like low latitude storms are not as strong as the satellite suggests, where as higher lattitude storms can be stronger than the satellite estimates. Maybe that is my recency bias or maybe there is some mechanism like the Coriolis effect being stronger as latitude increases.

That said, I will be amazed if recon does not find a stronger storm if the eyewall holds together until they get a pass. I am thinking we will see the pressure down to the low 920s.


Maybe you're right and an added intensity factor might be tied to latitude?? One correlation that would seem to support that theory may simply be higher surface pressures in the sub-tropic higher latitudes than in the lower more equatorial latitudes. Only thing is, I would think that a much greater pressure gradient would result in a far larger wind field. Not necessarily stronger inner core wind speed :think:
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Re: NATL: MELISSA - Hurricane - Discussion

#1182 Postby PavelGaborik10 » Sun Oct 26, 2025 11:19 pm

sasha_B wrote:We've hit adjusted T# 8.3 and CI 7.7 on ADT, which I believe surpasses Milton's peak raw T# of 8.0 (and matches its peak CI of 7.7).

Final T# Adj T# Raw T#
7.7 8.3 8.3


What was peak Eta?
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Re: NATL: MELISSA - Hurricane - Discussion

#1183 Postby sasha_B » Sun Oct 26, 2025 11:24 pm

PavelGaborik10 wrote:
sasha_B wrote:We've hit adjusted T# 8.3 and CI 7.7 on ADT, which I believe surpasses Milton's peak raw T# of 8.0 (and matches its peak CI of 7.7).

Final T# Adj T# Raw T#
7.7 8.3 8.3


What was peak Eta?


8.4 raw / 7.5 adj. / 7.3 final (not at the same fix time; these were the highest values overall for each field).
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Re: NATL: MELISSA - Hurricane - Discussion

#1184 Postby Travorum » Sun Oct 26, 2025 11:24 pm

PavelGaborik10 wrote:
sasha_B wrote:We've hit adjusted T# 8.3 and CI 7.7 on ADT, which I believe surpasses Milton's peak raw T# of 8.0 (and matches its peak CI of 7.7).

Final T# Adj T# Raw T#
7.7 8.3 8.3


What was peak Eta?


I just was looking at the ADT archive wondering the same thing; Eta's Dvorak estimates peaked at a Raw T# of 8.4 and a CI# of 7.3 (916.5mb/149kts), these were not at the same time.
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Re: NATL: MELISSA - Hurricane - Discussion

#1185 Postby Teban54 » Sun Oct 26, 2025 11:25 pm

In addition to the obvious cooling, the CDO has also greatly expanded:

Image
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Re: NATL: MELISSA - Hurricane - Discussion

#1186 Postby WaveBreaking » Sun Oct 26, 2025 11:28 pm

There's another moat on Jamaica's radar.

https://flhurricane.com/imageanimator.php?960
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Re: NATL: MELISSA - Hurricane - Discussion

#1187 Postby LarryWx » Sun Oct 26, 2025 11:28 pm

There are 3 Atlantic basin hurricanes on record on this date or later that were cat 5 and they had these lowest pressures/highest sustained winds:

-Mitch of 1998: Oct 26-28; 905 mb/180 mph; but landfall was way down at 80 mph on Honduras. The extreme rainfall though was what made it so deadly.

-Hattie of 1961: Oct 31; 914 mb/165 mph; it weakened slightly at landfall in Belize to 915 mb/150 mph (cat 4)

-Cuba hurricane of 1932: Nov 5-8; 915 mb/175 mph; but it weakened some before hitting land as it was 150/cat 4 on landfall

The latest on record cat 5 landfall was on Cuba on Oct 19 (in 1924) near its peak intensity of 165 mph. So, IF this were to hit Jamaica as a cat 5, it would become the latest on record to landfall as a cat 5 by 9 days.
Last edited by LarryWx on Sun Oct 26, 2025 11:32 pm, edited 1 time in total.
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Re: NATL: MELISSA - Hurricane - Discussion

#1188 Postby chaser1 » Sun Oct 26, 2025 11:29 pm

Teban54 wrote:FYI, the AF recon schedule has a fix time of 0530z (1:30 am EDT), and an exit time 3 hours later.


Perfect, just enough time to hit the bathroom then grab a glass of wine :wink:
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Re: NATL: MELISSA - Hurricane - Discussion

#1189 Postby wx98 » Sun Oct 26, 2025 11:47 pm

ATDoel wrote:I’m surprised no one has mentioned its forward speed(or lack of) as one of the factors why the wind speed is relatively low. A hurricanes stronger side is the side with a positive movement vector, the movement of the storm adds to the windspeed. If Melissa was moving 15 MPH, it would likely be a cat 5.

I had the same thought myself…
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Re: NATL: MELISSA - Hurricane - Discussion

#1190 Postby chaser1 » Sun Oct 26, 2025 11:48 pm

A few things that struck me while revewing a couple different satellite enhancements. One that Teban already mentioned is that the central core has definately expanded some. The other is that it seems apparent that the eye diameter has contracted a bit more. The 3rd is more subtle but also less definitive. Looking at earlier today's satellite loops, Melissa's eye appeared to present the classic "stadium effect". During the last couple of hours not only has the eye appeared to slightly contract further, but the depth of the coldest tops seemed less staggered; That is, appearing uniformly less distant outside & immediatly around the eye, and seemingly "more vertical" (less of a stadium effect). Not sure if I am explaining it well enough to make sense.
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Re: NATL: MELISSA - Hurricane - Discussion

#1191 Postby Travorum » Sun Oct 26, 2025 11:48 pm

Does Melissa have the highest CI# in Atlantic ADT history? Melissa's CI# just hit 7.8 with the most recent analysis, and the closest I could find in the Atlantic archives going back to ADT's implementation was Milton at a CI# of 7.7.
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Re: NATL: MELISSA - Hurricane - Discussion

#1192 Postby Teban54 » Sun Oct 26, 2025 11:50 pm

There are now more than 400 guests browsing this forum (almost certainly this exact thread). If you're one of them, sign up for a free account, and join us in the discussions!

Image
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Re: NATL: MELISSA - Hurricane - Discussion

#1193 Postby WaveBreaking » Sun Oct 26, 2025 11:52 pm

Recon just made a U-turn

Image
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Re: NATL: MELISSA - Hurricane - Discussion

#1194 Postby Hurricane2022 » Sun Oct 26, 2025 11:52 pm

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Re: NATL: MELISSA - Hurricane - Discussion

#1195 Postby Hurricane2022 » Sun Oct 26, 2025 11:57 pm

WaveBreaking wrote:Recon just made a U-turn

https://i.imgur.com/vpsrHPS.png

They didn't go back to Melissa. Looks like we have a technical problem, it seems. Feeling some 2020 vibes rn.
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Re: NATL: MELISSA - Hurricane - Discussion

#1196 Postby sasha_B » Sun Oct 26, 2025 11:57 pm

It would be a stunning development if recon had a problem that required them to turn around now. Virtually the strongest satellite presentation seen over the Atlantic since, what, Gilbert? now that Melissa has passed Eta's benchmark, and....
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Re: NATL: MELISSA - Hurricane - Discussion

#1197 Postby Hurricane2022 » Mon Oct 27, 2025 12:02 am

I wonder if it's a depressurization issue because they seem to have lowered their flight level.
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Re: NATL: MELISSA - Hurricane - Discussion

#1198 Postby Keldeo1997 » Mon Oct 27, 2025 12:06 am

Recon turned back around and is going back in.
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Re: NATL: MELISSA - Hurricane - Discussion

#1199 Postby Hurricane2022 » Mon Oct 27, 2025 12:06 am

They're heading back!!!!! :shoot:
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Re: NATL: MELISSA - Hurricane - Discussion

#1200 Postby Travorum » Mon Oct 27, 2025 12:08 am

Keldeo1997 wrote:Recon turned back around and is going back in.


Please set the "It's so over" meter to "We're so back"
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