ATL: Tropical Depression Edouard

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Clint_TX
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Re: ATL: Tropical Storm Edouard - Gulf of Mexico

#921 Postby Clint_TX » Sun Aug 03, 2008 6:32 pm

MiamiensisWx wrote:KWT, I was not referring to mid level dry air. I was alluding to the fact that several people believe land itself inhibits development.

Regardless, there are a few factors that make me more conservative on the prospects of Edouard attaining hurricane intensity. Convective outflow from the passing MCS to the NW and overland convection to the north has been inducing upper level shear over the system. This may be an issue, even as the TC eventually turns west and northerly shear on the east side of the H5 ridge decreases. Note the multiple Mesoscale Convective Systems rotating around the upper level ridge. This may slightly hinder Edouard and prevent the chances of a more extreme intensity solution from verifying, despite an increasingly ideal upper air regime.

Dean4Storms, the LLC is not moving WNW. You may be fooled by the angle of that satellite loop. The following visible loop is much better, and it clearly depicts a continuing WSW movement of the LLC, which is now partially covered by developing thunderstorms. Edouard is clearly gradually intensifying and organizing. Overall, tonight's diurnal maximum and the developing convection's relation to the LLC may play a big role in regards to the system's rate of intensification and future intensity.

http://www.ssd.noaa.gov/goes/flt/t2/loop-vis.html

I think people should take the "MCS factors" into account and monitor tonight's trends before declaring a Cat 1 landfall as an undeniable fact.


Thanks for the excellent post

You can see on the loop you linked up the vigorous, albeit small, circulation maturing. If there is a analog in my mind it's Bret day two...and if that's the case then tonight's diurnal max will be very telling
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#922 Postby KWT » Sun Aug 03, 2008 6:33 pm

Dean4Storms, I agree its on the NW side but the tighter LLC is NOT IMO exposed, the NW quadrant of the broader circulation clearly is but the latest recon pass showed lowest pressure is in the far NW side of the convection but it iss under the convection not exposed according to recon.

I think we are similar other then you use the words becoming exposed when the tight LLC is still clearly under the convection as confirmed by recon and the pro mets.
Last edited by KWT on Sun Aug 03, 2008 6:35 pm, edited 2 times in total.
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Re: ATL: Tropical Storm Edouard - Gulf of Mexico

#923 Postby Sjones » Sun Aug 03, 2008 6:33 pm

We just had some pretty gusty winds and rain, starting to die down now. As for me and my family, we are getting prepared for Edouard by getting all loose things around the yard picked up and so forth. I sure hope Edouard picks up his speed, because if not, today's storms will be nothing compared to when Edouard makes his appearance. :eek:
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Re: ATL: Tropical Storm Edouard - Gulf of Mexico

#924 Postby vaffie » Sun Aug 03, 2008 6:35 pm

Rapid intensification appears to have paused--the pressure has been stable at 1002.7-1002.8 for the past couple hours. Now we wait until DMAX...
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#925 Postby hwego7 » Sun Aug 03, 2008 6:36 pm

18z GFDL is keeping this a full 126 hours this run :eek: can't wait to see what the intensity must be this run. It had been dissipating it every previous run after 108 at most.
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Derek Ortt

#926 Postby Derek Ortt » Sun Aug 03, 2008 6:37 pm

not sure this will fire at DMAX

As I said last night, developing GOM systems tend to lose convection at night and refire during the day. This one did just that yesterday
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Re: ATL: Tropical Storm Edouard - Gulf of Mexico

#927 Postby stevetampa33614 » Sun Aug 03, 2008 6:38 pm

I eagerly await the intensity forecast models.
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#928 Postby HURAKAN » Sun Aug 03, 2008 6:38 pm

Image
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Re: ATL: Tropical Storm Edouard - Gulf of Mexico

#929 Postby Wx_Warrior » Sun Aug 03, 2008 6:38 pm

Alicia, 1983, path is starting to come to mind.
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Re: ATL: Tropical Storm Edouard - Gulf of Mexico

#930 Postby hicksta » Sun Aug 03, 2008 6:40 pm

Ha, and earlier this morning they said just rain no tropical disturbance. Now its a TS getting stronger, this worries me.
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Re:

#931 Postby Dean4Storms » Sun Aug 03, 2008 6:40 pm

KWT wrote:Dean4Storms, I agree its on the NW side but the tighter LLC is NOT IMO exposed, the NW quadrant of the broader circulation clearly is but the latest recon pass showed lowest pressure is in the far NW side of the convection but it iss under the convection not exposed according to recon.

I think we are similar other then you use the words becoming exposed when the tight LLC is still clearly under the convection as confirmed by recon and the pro mets.



You guys forget that those Sat. views are looking northward, they are not directly overhead the system. If you are looking at a LLC just to the north of towering convection it makes it appear to be underneath it.

All the deep convection is on the south side of the system.
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Re: ATL: Tropical Storm Edouard - Gulf of Mexico

#932 Postby jaxfladude » Sun Aug 03, 2008 6:41 pm

Wx_Warrior wrote:Alicia, 1983, path is starting to come to mind.

Joe B. will have something to say about Edouard...
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#933 Postby KWT » Sun Aug 03, 2008 6:41 pm

Cool image hurakan, show what we've been talking about with the LLC just tucked into the NW region of that deep convection.

Interesting Derek, will have to wait and see now its got itself going these cycles may not have a huge role on the structure of this system but needs watching anyway.

also I do think Alicia is the best comprasion to this system at this early stage.
Last edited by KWT on Sun Aug 03, 2008 6:42 pm, edited 1 time in total.
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Re:

#934 Postby Dean4Storms » Sun Aug 03, 2008 6:43 pm

Derek Ortt wrote:not sure this will fire at DMAX

As I said last night, developing GOM systems tend to lose convection at night and refire during the day. This one did just that yesterday


Very true, the disturbance as it was this early AM had lost most of its deep convection.
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#935 Postby Stormcenter » Sun Aug 03, 2008 6:45 pm

This storm has been pretty persistent and has not ever been completely without some sort of convection since it started developing yesterday. I'm curious (like many others on this board) to see what develops tonight.
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Re:

#936 Postby jinftl » Sun Aug 03, 2008 6:45 pm

Is there anything that would induce a WNW motion sooner...looking at this satellite, i still think it wouldn't take much to get this thing over south-central louisiana before it can really blow up


HURAKAN wrote:Image
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MiamiensisWx

#937 Postby MiamiensisWx » Sun Aug 03, 2008 6:48 pm

500-850 mb steering does not support a landfall on the Louisiana Delta region and far southern portions of the state:

http://cimss.ssec.wisc.edu/tropic/real-time/atlantic/winds/wg8dlm2.html

As the system deepens, it will be more influenced by these mid/upper levels (as opposed to 700-850 mb).

Freeport to Galveston, Texas appears to be under the gun.
Last edited by MiamiensisWx on Sun Aug 03, 2008 6:49 pm, edited 1 time in total.
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Re: Re:

#938 Postby Stormcenter » Sun Aug 03, 2008 6:48 pm

jinftl wrote:Is there anything that would induce a WNW motion sooner...looking at this satellite, i still think it wouldn't take much to get this thing over south-central louisiana before it can really blow up


HURAKAN wrote:Image



Well you are right it really isn't that far off the LA. coastline even if it continues to moves due west (in the short term) as predicted.
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Re: ATL: Tropical Storm Edouard - Gulf of Mexico

#939 Postby Steve » Sun Aug 03, 2008 6:51 pm

>>Dean4Storms, I agree its on the NW side but the tighter LLC is NOT IMO exposed,

It's just coming together. Those bandings are showing up as it gets better organized IMHO. I don't see this as one of those systems where the LLC is racing out front or anything, it's still building on the north and northwestern side as is evidenced by the banding features starting to show up. So I agree with you.

Steve
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#940 Postby KWT » Sun Aug 03, 2008 6:52 pm

Its close but track looks like its pretty much due west IMO so its not getting any closer. There's a big high nearby that should prevent it from going inland over LA though the closeness of land may limit its ability to get rapidly stronger, then again maybe not who knows!
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