ATL: LAURA - Post-Tropical - Discussion

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GCANE
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Re: ATL: LAURA - Hurricane - Discussion

#6221 Postby GCANE » Wed Aug 26, 2020 3:25 pm

Looks like that moat feature is not there anymore
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cfisher

Re: ATL: LAURA - Hurricane - Discussion

#6222 Postby cfisher » Wed Aug 26, 2020 3:26 pm

An ERC in the near-term wouldn't necessarily be a good thing...
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Re: ATL: LAURA - Hurricane - Discussion

#6223 Postby cheezyWXguy » Wed Aug 26, 2020 3:26 pm

Fancy1001 wrote:
cheezyWXguy wrote:
cfisher wrote:MPI might be difficult to achieve with such a large eye.

No doubt, MPI in this area is sub 900. But I think the increase in sst’s in this area would likely allow for it to continue building deep enough convection to insulate it from any shear that may arise at landfall.

What's MPI

Maximum Potential Intensity
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Re: ATL: LAURA - Hurricane - Discussion

#6224 Postby WeatherEmperor » Wed Aug 26, 2020 3:26 pm

Fancy1001 wrote:
cheezyWXguy wrote:
cfisher wrote:MPI might be difficult to achieve with such a large eye.

No doubt, MPI in this area is sub 900. But I think the increase in sst’s in this area would likely allow for it to continue building deep enough convection to insulate it from any shear that may arise at landfall.

What's MPI

Maximum Potential Intensity


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Re: ATL: LAURA - Hurricane - Discussion

#6225 Postby wx98 » Wed Aug 26, 2020 3:27 pm

Recon fix confirmed a definite NNW turn now, which I alluded to several minutes ago. Cameron/Holly Beach in the crosshairs...
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Re: ATL: LAURA - Hurricane - Discussion

#6226 Postby FLpanhandle91 » Wed Aug 26, 2020 3:28 pm

Any beginnings of concentric banding has been quickly absorbed by the inner eye wall. Additionally, recon hasn't found even a hint of double wind maxima yet.
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Re: ATL: LAURA - Hurricane - Discussion

#6227 Postby Fancy1001 » Wed Aug 26, 2020 3:28 pm

cheezyWXguy wrote:
Fancy1001 wrote:
cheezyWXguy wrote:No doubt, MPI in this area is sub 900. But I think the increase in sst’s in this area would likely allow for it to continue building deep enough convection to insulate it from any shear that may arise at landfall.

What's MPI

Maximum Potential Intensity

Ok
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Re: ATL: LAURA - Hurricane - Discussion

#6228 Postby Hurricane Mike » Wed Aug 26, 2020 3:29 pm

The surge this thing has likely built up is going to be enormous.
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Re: ATL: LAURA - Hurricane - Discussion

#6229 Postby wkwally » Wed Aug 26, 2020 3:29 pm

wx98 wrote:Recon fix confirmed a definite NNW turn now, which I alluded to several minutes ago. Cameron/Holly Beach in the crosshairs...

So are we ruling out a Texas center of landfall now?
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Re: ATL: LAURA - Hurricane - Discussion

#6230 Postby Extratropical94 » Wed Aug 26, 2020 3:30 pm

Center dropsonde 947/6kt

Looks like the insane intensification trend has slowed down some
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Re: ATL: LAURA - Hurricane - Discussion

#6231 Postby Highteeld » Wed Aug 26, 2020 3:31 pm

Eye size on radar looks mostly unchanged, maybe a mile smaller

Image
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Very useful information on the Dvorak Technique --

https://severe.worldweather.wmo.int/TCF ... kBeven.pdf

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Re: ATL: LAURA - Hurricane - Discussion

#6232 Postby aspen » Wed Aug 26, 2020 3:32 pm

cfisher wrote:An ERC in the near-term wouldn't necessarily be a good thing...

It wouldn’t even have much time to have its full effect of weakening Laura yet expanding its wind field. There’s no more than 12 hours until landfall.
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Re: ATL: LAURA - Hurricane - Discussion

#6233 Postby ColdMiser123 » Wed Aug 26, 2020 3:32 pm

Dropsonde supports 946.4 mb.
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Re: ATL: LAURA - Hurricane - Discussion

#6234 Postby butch » Wed Aug 26, 2020 3:33 pm

KPLC in Lake Charles has just abandoned their station, transferring their coverage to Baton Rouge. Good move.
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Re: ATL: LAURA - Hurricane - Discussion

#6235 Postby mrbagyo » Wed Aug 26, 2020 3:33 pm

Image
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Re: ATL: LAURA - Hurricane - Discussion

#6236 Postby Highteeld » Wed Aug 26, 2020 3:34 pm

YEET

Image
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Very useful information on the Dvorak Technique --

https://severe.worldweather.wmo.int/TCF ... kBeven.pdf

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Re: ATL: LAURA - Hurricane - Discussion

#6237 Postby Cunxi Huang » Wed Aug 26, 2020 3:34 pm

Some decent 155 kt on 900 mb level.

Image
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Re: ATL: LAURA - Hurricane - Discussion

#6238 Postby GCANE » Wed Aug 26, 2020 3:34 pm

Eye Drop
947mb
27.6N 92.7W
RH = 56%

Relative Humidity up from 46% last drop.
Watching if the trend continues.
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Re: ATL: LAURA - Hurricane - Discussion

#6239 Postby Hypercane_Kyle » Wed Aug 26, 2020 3:34 pm

No evidence of an EWRC at least from this perspective.

Image
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Re: ATL: LAURA - Hurricane - Discussion

#6240 Postby Hypercane_Kyle » Wed Aug 26, 2020 3:35 pm

Dropsonde suggest Laura might be slightly stronger, up to 125 knots. In fact, winds were 150mph literally a few feet off the surface.

Additionally:

Code: Select all

Average Wind Over Lowest Available 150 geopotential meters (gpm) of the sounding:
- Lowest 150m: 155 gpm - 5 gpm (509 geo. feet - 16 geo. feet)
- Wind Direction: 80° (from the E)
- Wind Speed: 130 knots (150 mph)
Last edited by Hypercane_Kyle on Wed Aug 26, 2020 3:36 pm, edited 1 time in total.
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My posts are my own personal opinion, defer to the National Hurricane Center (NHC) and other NOAA products for decision making during hurricane season.


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