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Hurricane Idalia


hlcater
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22 minutes ago, WxWatcher007 said:

00z spaghetti models

10L_tracks_latest.png

 Nearly unanimous Taylor County landfall centered on ~9AM EDT. Then it tracks go mainly just inland from Savannah, which is about the worst possible track in terms of winds. Also, high tide there is an astronomical high tide due to perigee and full moon and it's at 8:30PM, which is near the time of the center being closest.

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000
WTNT65 KNHC 300157
TCUAT5

Hurricane Idalia Tropical Cyclone Update
NWS National Hurricane Center Miami FL AL102023
1000 PM EDT Tue Aug 29 2023

...IDALIA FORECAST TO BECOME A MAJOR HURRICANE TONIGHT...
...CATASTROPHIC STORM SURGE AND DESTRUCTIVE WINDS LIKELY TOMORROW
MORNING WHERE THE CORE OF IDALIA MOVES INLAND...

NOAA and Air Force Reserve Hurricane Hunter aircraft data indicate
that Idalia has strengthened further. Maximum sustained winds have
increased to 110 mph (175 km/h). The minimum pressure based on
dropsonde data from the aircraft has fallen to 960 mb (28.35
inches).

The National Hurricane Center has begun hourly position and
intensity updates on Idalia. The hourly updates will continue as
long as Idalia's eye is easily trackable in ground-based radar data.

SUMMARY OF 1000 PM EDT...0200 UTC...INFORMATION
----------------------------------------------
LOCATION...27.4N 84.6W
ABOUT 135 MI...215 KM WSW OF TAMPA FLORIDA
ABOUT 205 MI...330 KM S OF TALLAHASSEE FLORIDA
MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H
PRESENT MOVEMENT...N OR 10 DEGREES AT 18 MPH...29 KM/H
MINIMUM CENTRAL PRESSURE...960 MB...28.35 INCHES


.

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1 hour ago, Master of Disaster said:

There is zero possibility that eye is 20 miles across imo. The eye contracting has been noted for at least two hours. Anyone have a way to measure the distance from eye wall to eye wall? I am curious if sat and radar actually show this or if it just looks that way? 

I could be wrong but I *think* recon found N-S elliptical eye 12 km x 8 km.  EDIT- I think it is 12 nm x 8 nm.

Quote
G. E18/12/8

 

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2 minutes ago, Floydbuster said:

Reminds me a bit of Dennis in 2005. Very tight core. With the hurricane force winds extending out only 25 miles, you miss them and it could be night and day.

yeah thats a nice comparison

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14 minutes ago, MattPetrulli said:

4992a9738fd58b5d7214f5e13e9bd9a8.jpg
 

Thinking we got an EWRC going on

Don't think you can call it that yet. Still clear evidence that the band is spiraling inward and some of the "moat" is probably from very strong convection in the northern semicircle of the eyewall. I've noticed this a few other times tonight. If that outer band continues to gain substance then maybe though I think we're probably a few hours from that minimum.

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Just now, hlcater said:

Don't think you can call it that yet. Still clear evidence that the band is spiraling inward and some of the "moat" is probably from very strong convection in the northern semicircle of the eyewall. I've noticed this a few other times tonight. If that outer band continues to gain substance then maybe though I think we're probably a few hours from that minimum.

I’m 50/50 on it. Recon hasn’t really found a double wind maxima. But man radar looks moaty. 

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2 minutes ago, 40/70 Benchmark said:

Regardless of whether or not its technically an ERC, I would think that would keep things in check at least to a degree in terms of intensity. 

Not necessarily, as mentioned this happened earlier tonight on a similar scale and Idalia managed to continue intensification. Unless it’s a true ERC then intensification should continue. I mean, while this was happening, Recon Hunters got 957mb so it didn’t hinder pressure falls at all.

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3 minutes ago, WxSynopsisDavid said:

Not necessarily, as mentioned this happened earlier tonight on a similar scale and Idalia managed to continue intensification. Unless it’s a true ERC then intensification should continue. I mean, while this was happening, Recon Hunters got 957mb so it didn’t hinder pressure falls at all.

Yes, I am not saying it will halt (unless it truly is ERC), but these little structural nuances are probably why it has yet to really rip a hole in the atmosphere as of yet.

Still time.

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It's no doubt an organizing outer concentric band. But the eyewall is ripping right now. By far the best it has looked. Idalia has a lot of banding features spiraling into even the outer concentric band. It very well may lead to a full on ERC, but it may still strengthen quite a bit before that can starve the current eyewall. We may see this level off intensification prior to landfall, but it could still deepen quite significantly tonight before that leveling occurs. Will be interesting to watch.

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3 minutes ago, WxSynopsisDavid said:

Not necessarily, as mentioned this happened earlier tonight on a similar scale and Idalia managed to continue intensification. Unless it’s a true ERC then intensification should continue. I mean, while this was happening, Recon Hunters got 957mb so it didn’t hinder pressure falls at all.

Charlie and Ida kept deepening until landfall despite having concentric eyewalls.   This outer eyewall seems to be providing a stable feeder band to the inner eyewall at the moment, helping maintain organization if anything.

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1 minute ago, Windspeed said:

It's no doubt an organizing outer concentric band. But the eyewall is ripping right now. By far the best it has looked. Idalia has a lot of banding features spiraling into even the outer concentric band. It very well may lead to a full on ERC, but it may still strengthen quite a bit before that can starve the current eyewall. We may see this level off intensification theough landfall, but it could still deepen quite significantly tonight before that leveling occurs. Will be interesting to watch.

Really interesting but NHC states intensification will continue on landfall bringing intensity to Cat 4 as it landfalls. Seems to be specifically calling for a frictional-induced RI at landfall.

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Just now, Amped said:

Charlie and Ida kept deepening until landfall despite having concentric eyewalls.   This outer eyewall seems to be providing a stable feeder band to the inner eyewall at the moment, helping maintain organization if anything.

Seems to be a climo with these gulf canes approaching Florida. Ian at one point had this feature if I recall correctly.

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11 hours ago, LakeEffectKing said:

Still thinking 140 is very plausible late tonight...then a slight weakening just prior to landfall...

RI, I would think is about 6 -12 hours away.

 

11 hours ago, LakeEffectKing said:

I don't think the eye will clear out till about 8:00 or 9:00 (eastern) tonight. Takes several hours after closed EW is observed per aircraft, in my experience. 

Next 6-8 hrs should see another 15mb drop...it's go time for RI.

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