Blp, are those all possible ensemble runs for one time period or do they represent HCCA tracks from different periods. Or maybe a better question is what models are part of the HCCA consensus?
NATL: MELISSA - Models
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Re: NATL: MELISSA - Models
Blp, are those all possible ensemble runs for one time period or do they represent HCCA tracks from different periods. Or maybe a better question is what models are part of the HCCA consensus?
Last edited by ronjon on Wed Oct 22, 2025 9:59 am, edited 1 time in total.
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Re: NATL: MELISSA - Models
ronjon wrote:
Blp, are those all possible ensemble runs for one time period or do they represent HCAA tracks from different periods. Or maybe a better question is what models are part of the HCAA consensus?
It's tracks from older time periods to the most current.
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Model Runs Cheat Sheet:
GFS (5:30 AM/PM, 11:30 AM/PM)
HWRF, GFDL, UKMET, NAVGEM (6:30-8:00 AM/PM, 12:30-2:00 AM/PM)
ECMWF (1:45 AM/PM)
TCVN is a weighted averaged
Re: NATL: MELISSA - Models
AutoPenalti wrote:ronjon wrote:
Blp, are those all possible ensemble runs for one time period or do they represent HCAA tracks from different periods. Or maybe a better question is what models are part of the HCAA consensus?
It's tracks from older time periods to the most current.
I'm assuming the red line would be the most current based on trends?
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Re: NATL: MELISSA - Models
Should head NE-ENE from that point across Cuba. Nothing is ever certain but I think the door is pretty much closed for anything trying to sneak through yucatan channel which could potentially threaten SFL.
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Re: NATL: MELISSA - Models
caneseddy wrote:AutoPenalti wrote:ronjon wrote:
Blp, are those all possible ensemble runs for one time period or do they represent HCAA tracks from different periods. Or maybe a better question is what models are part of the HCAA consensus?
It's tracks from older time periods to the most current.
I'm assuming the red line would be the most current based on trends?
That is correct.
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Re: NATL: MELISSA - Models
caneseddy wrote:AutoPenalti wrote:ronjon wrote:
Blp, are those all possible ensemble runs for one time period or do they represent HCAA tracks from different periods. Or maybe a better question is what models are part of the HCAA consensus?
It's tracks from older time periods to the most current.
I'm assuming the red line would be the most current based on trends?
Correct. It filters through bias from in-house and operational models and uses the HWRF as the driving dynamical model TC Intensity Guidance
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The posts in this forum are NOT official forecasts and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or STORM2K. For official information, please refer to products from the NHC and NWS.
Model Runs Cheat Sheet:
GFS (5:30 AM/PM, 11:30 AM/PM)
HWRF, GFDL, UKMET, NAVGEM (6:30-8:00 AM/PM, 12:30-2:00 AM/PM)
ECMWF (1:45 AM/PM)
TCVN is a weighted averaged
Re: NATL: MELISSA - Models
12z icon again wrecks Jamaica (Right front quad along the southern part of the island, including Kingston)


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Re: NATL: MELISSA - Models
SFLcane wrote:
Should head NE-ENE from that point across Cuba. Nothing is ever certain but I think the door is pretty much closed for anything trying to sneak through yucatan channel which could potentially threaten SFL.
The 500mb pattern at that time is not set in stone.
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Re: NATL: MELISSA - Models
SFLcane wrote:
Should head NE-ENE from that point across Cuba. Nothing is ever certain but I think the door is pretty much closed for anything trying to sneak through yucatan channel which could potentially threaten SFL.
Should but the synoptic set up is not set in stone, if anything recent Euro trends indicate the trough retrograding further north. The longer this stays south and west, the more time it will take for models to get a pattern set up.
Last edited by AutoPenalti on Wed Oct 22, 2025 10:25 am, edited 1 time in total.
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The posts in this forum are NOT official forecasts and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or STORM2K. For official information, please refer to products from the NHC and NWS.
Model Runs Cheat Sheet:
GFS (5:30 AM/PM, 11:30 AM/PM)
HWRF, GFDL, UKMET, NAVGEM (6:30-8:00 AM/PM, 12:30-2:00 AM/PM)
ECMWF (1:45 AM/PM)
TCVN is a weighted averaged
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Re: NATL: MELISSA - Models
xironman wrote:SFLcane wrote:
Should head NE-ENE from that point across Cuba. Nothing is ever certain but I think the door is pretty much closed for anything trying to sneak through yucatan channel which could potentially threaten SFL.
The 500mb pattern at that time is not set in stone.
The 500mb pattern is pretty much in our favor across the peninsula hence not 1 ensemble brings over the state. Never like to make bold statements with a storm to our south in oct but unless something changes i feel pretty good saying we should be good here.


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Re: NATL: MELISSA - Models
SFLcane wrote:xironman wrote:SFLcane wrote:
Should head NE-ENE from that point across Cuba. Nothing is ever certain but I think the door is pretty much closed for anything trying to sneak through yucatan channel which could potentially threaten SFL.
The 500mb pattern at that time is not set in stone.
The 500mb pattern is pretty much in our favor across the peninsula hence not 1 ensemble brings over the state. Never like to make bold statements with a storm to our south in oct but unless something changes i feel pretty good saying we should be good here.
https://i.postimg.cc/6Qk1x3Kj/vvvv.png
https://i.postimg.cc/52Rfvw5F/vvv.png
I see a few of those ensemble heading up to the northeast.
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Re: NATL: MELISSA - Models
Fancy1002 wrote:SFLcane wrote:xironman wrote:
The 500mb pattern at that time is not set in stone.
The 500mb pattern is pretty much in our favor across the peninsula hence not 1 ensemble brings over the state. Never like to make bold statements with a storm to our south in oct but unless something changes i feel pretty good saying we should be good here.
https://i.postimg.cc/6Qk1x3Kj/vvvv.png
https://i.postimg.cc/52Rfvw5F/vvv.png
I see a few of those ensemble heading up to the northeast.
A handful not very likely at all.
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Re: NATL: MELISSA - Models
I wouldn’t rule out Florida yet the further west Melissa travels the more in play Florida is before the NE turn and the set up is changing every day it seems like.
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Re: NATL: MELISSA - Models
MHC Tracking wrote:HAFS simulated IR seems to have glitched, even in the Western Caribbean the tropopause isn't this high.
https://cdn.discordapp.com/attachments/981328327199559760/1430535925313568902/hafsb_satIR_13L_43.png?ex=68fa21e6&is=68f8d066&hm=0a9b11bb24195cbf4caa078461abff9d72461a4875050da6b22aa787b68cb495&
Never say never. Wilma nearly got to such.
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Re: NATL: MELISSA - Models
boca wrote:I wouldn’t rule out Florida yet the further west Melissa travels the more in play Florida is before the NE turn and the set up is changing every day it seems like.
Extremely unlikely looking at the pwat and continental US frontal setup It would have to get to the northern tip of the Yucatan to do that. It's more likely to plough into Central America than get to florida. Cayman islands, Cuba/Bahamas perhaps.
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Re: NATL: MELISSA - Models
The 06z experimental HAFS-B run was... something to say the least. Basically an Atlantic Patricia:
![]() | ![]() |
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Re: NATL: MELISSA - Models
BobHarlem wrote:boca wrote:I wouldn’t rule out Florida yet the further west Melissa travels the more in play Florida is before the NE turn and the set up is changing every day it seems like.
Extremely unlikely looking at the pwat and continental US frontal setup It would have to get to the northern tip of the Yucatan to do that. It's more likely to plough into Central America than get to florida. Cayman islands, Cuba/Bahamas perhaps.
Shear is howling across the gulf and florida with the jetstream now drapped accross the area.


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Re: NATL: MELISSA - Models
12z GFS continues its out to lunch solution with a NE turn basically starting now.
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NATL: MELISSA - Tropical Storm - Discussion
The NOAA G-IV is doing a synoptic training mission around Melissa right now, hopefully some dropsonde data can be collected to feed into the models.
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Re: NATL: MELISSA - Models
Gotta give it to both the GFS and the UKMET for their consistency, even if they end up being dead wrong.
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