ATL: FIONA - Post-Tropical - Discussion
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Re: ATL: FIONA - Hurricane - Discussion
A tiny eye has appeared on IR. Could this be a pinhole or is it simply a small part of a larger eye that still has to clear?
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- MississippiWx
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Re: ATL: FIONA - Hurricane - Discussion
kevin wrote:A tiny eye has appeared on IR. Could this be a pinhole or is it simply a small part of a larger eye that still has to clear?
https://imgur.com/b0nbNzG
Just part of a larger eye. Fiona is still in the process of restructuring its eye wall.
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Re: ATL: FIONA - Hurricane - Discussion
Latest pass, 960.0 mb extrapolated and 105 kt FL winds & 101 kt SFMR.


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- galaxy401
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Re: ATL: FIONA - Hurricane - Discussion
Maintaining it at 100 kts is probably the right call for now. The pressure is now catching up to the wind speed.
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Got my eyes on moving right into Hurricane Alley: Florida.
Re: ATL: FIONA - Hurricane - Discussion
I was wondering if being north of Hispaniola blocked Fiona's outflow from the south. That would explain why Fiona held up so well while over DR, but started degrading a bit in the last 12 hours or so with an EWRC earlier than expected. No idea if that's true though.
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- skyline385
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Re: ATL: FIONA - Hurricane - Discussion
So it was the beginning of an EWRC yesterday when the eye started to close up?
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- cheezyWXguy
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Re: ATL: FIONA - Hurricane - Discussion
skyline385 wrote:So it was the beginning of an EWRC yesterday when the eye started to close up?
The MW image Hammy posted yesterday evening around the time EWRC comments started popping up showed a fully intact core (except for a weakness to the sw due to land interaction) with a lot of prominent banding, but not much of a forming outer eyewall yet. My personal guess is that it formally started around midnight when the cdo started to expand.
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- Iceresistance
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Re: ATL: FIONA - Hurricane - Discussion
Just spotted iCyclone putting out tweets again, he's doing alright after Fiona's passage over the DR.
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Winter 2020-2021

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Re: ATL: FIONA - Hurricane - Discussion
Dropsonde in the NE eyewall suggests that strong winds are returning to Fiona, but still need to mix down to the surface. Looks like the EWRC is in its final stages.
Edit: to be clear, it shows 115-120kt (instantaneous) at 961-964mb, dropping to 75kt at the surface (977mb). That's very close to the surface, but until it mixes down (which I expect should happen very shortly) there is no increased surface heat flux --> no WISHE --> no ramp up in intensity.
Edit: to be clear, it shows 115-120kt (instantaneous) at 961-964mb, dropping to 75kt at the surface (977mb). That's very close to the surface, but until it mixes down (which I expect should happen very shortly) there is no increased surface heat flux --> no WISHE --> no ramp up in intensity.
Last edited by ThetaE on Tue Sep 20, 2022 10:48 am, edited 2 times in total.
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- ScottNAtlanta
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Re: ATL: FIONA - Hurricane - Discussion
Looks like it has taken a slightly westward jog/wobble in the last several frames as the eye clears.
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- Iceresistance
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Re: ATL: FIONA - Hurricane - Discussion
Raw ADT is now at 6
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Bill 2015 & Beta 2020
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All observations are in Tecumseh, OK unless otherwise noted.
Winter posts are focused mainly for Oklahoma & Texas.
Take any of my forecasts with a grain of salt, refer to the NWS, SPC, and NHC for official information
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Winter 2020-2021

All observations are in Tecumseh, OK unless otherwise noted.
Winter posts are focused mainly for Oklahoma & Texas.
Take any of my forecasts with a grain of salt, refer to the NWS, SPC, and NHC for official information
Never say Never with weather! Because ANYTHING is possible!
Re: ATL: FIONA - Hurricane - Discussion
Looks more like a triple eyewall: a double wind maxima close to the core, then that third wind maxima further out.
https://mobile.twitter.com/TropicalTidb ... gr%5Etweet
https://mobile.twitter.com/TropicalTidb ... gr%5Etweet
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- cheezyWXguy
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Re: ATL: FIONA - Hurricane - Discussion
aspen wrote:Looks more like a triple eyewall: a double wind maxima close to the core, then that third wind maxima further out.
https://mobile.twitter.com/TropicalTidb ... gr%5Etweet
The consolidation process certainly seems to be ongoing. Would be nice to get another MW pass to see if this is going to be a perpetual EWRC thing
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Re: ATL: FIONA - Hurricane - Discussion
cheezyWXguy wrote:aspen wrote:Looks more like a triple eyewall: a double wind maxima close to the core, then that third wind maxima further out.
https://mobile.twitter.com/TropicalTidb ... gr%5Etweet
The consolidation process certainly seems to be ongoing. Would be nice to get another MW pass to see if this is going to be a perpetual EWRC thing
If this is another perpetual EWRC situation, then it probably won’t get any stronger than it is now and would be another failed Cat 4 forecast. However, it seems like that outer maxima is aligned with where the eye seems to be outlined on visible imagery, so I’m not sure what’s up with the double maxima near the core. Is it due to a fragment of the original eyewall? Is the outer eyewall on visible imagery a third one that started forming today?
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- cheezyWXguy
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Re: ATL: FIONA - Hurricane - Discussion
Full (cloud-filled) eye now visible. Should see cloud tops start cooling around the eye in a little while.
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Re: ATL: FIONA - Hurricane - Discussion
Extrap pressure 959.6 mb, SE quad has 99 kt FL and 94 kt SFMR. Looks like Fiona is holding steady and even slightly deepening, despite a rather anemic satellite appearance due to the EWRC.
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- ElectricStorm
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Re: ATL: FIONA - Hurricane - Discussion
Eye drop 960/8, supports 959-960
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