ATL: IRMA - Models

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Re: ATL: IRMA - Models

#4501 Postby Kingarabian » Sun Sep 03, 2017 4:57 pm

18z GFS compared to the 12z. More SW. Not looking good:

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Re: ATL: IRMA - Models

#4502 Postby Kingarabian » Sun Sep 03, 2017 4:59 pm

18z GFS makes it a Cat.5 sooner:

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Re: ATL: IRMA - Models

#4503 Postby KWT » Sun Sep 03, 2017 5:00 pm

Models really are trending close to PR and Hispaiola now, indeed alot are now right over the NE Caribbean islands which will sadly probably be a disaster for them as they take what will probably be a 4/5 head on.
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Re: ATL: IRMA - Models

#4504 Postby HurricaneFrances04 » Sun Sep 03, 2017 5:00 pm

It has the storm running about 6 hours faster, vs the 12z.
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Re: ATL: IRMA - Models

#4505 Postby WeatherEmperor » Sun Sep 03, 2017 5:01 pm

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Re: ATL: IRMA - Models

#4506 Postby SFLcane » Sun Sep 03, 2017 5:02 pm

In SE Bahamas and further SW indeed
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Re: ATL: IRMA - Models

#4507 Postby Kingarabian » Sun Sep 03, 2017 5:02 pm

With a dominating ridge, what trough is the GFS interacting Irma with such that it bombs out this low?
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Re: ATL: IRMA - Models

#4508 Postby Kingarabian » Sun Sep 03, 2017 5:03 pm

18z GFS 96->120:

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Re: ATL: IRMA - Models

#4509 Postby WeatherEmperor » Sun Sep 03, 2017 5:04 pm

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I sense a Florida hit on this run...


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Re: ATL: IRMA - Models

#4510 Postby FLpanhandle91 » Sun Sep 03, 2017 5:04 pm

Kingarabian wrote:With a dominating ridge, what trough is the GFS interacting Irma with such that it bombs out this low?


Possibly the upper level trough that is riding to it's northwest during the early run?
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Re: ATL: IRMA - Models

#4511 Postby Kingarabian » Sun Sep 03, 2017 5:05 pm

18z GFS steering:

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Re: ATL: IRMA - Models

#4512 Postby SFLcane » Sun Sep 03, 2017 5:05 pm

Still SW nearing FL at 132 hrs
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Re: ATL: IRMA - Models

#4513 Postby WeatherEmperor » Sun Sep 03, 2017 5:05 pm

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Uuuuh....guys.....


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Re: ATL: IRMA - Models

#4514 Postby Steve » Sun Sep 03, 2017 5:05 pm

That's a very strong Cat 5 going into the Bahamas on a lower resolution output. Looks like 904MB. Probably as low as we've seen in the Atlantic since Wilma if I'm not mistaken.

Let me remind everyone something that we learned here in the Gulf Coast after Hurricane Katrina. While I'll always say it was just an average/ordinary Cat 3 storm, because of the surge and momentum it had from its Cat 5 days over the middle of the Gulf, it had a Category 5 surge component with mostly 2-3 effects otherwise. Wherever GFS brings it in, beware of massive surges ahead of it for SE and S facing river basins, bays and outlets. Trust me.

Also, GFS is 1 degree farther south and 1 degree farther west at 132 hours right in the Bahamas. It's 900mb vs the last run that was 890s and 1 degree farther north and east
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Re: ATL: IRMA - Models

#4515 Postby Aric Dunn » Sun Sep 03, 2017 5:07 pm

126 to 138 its moving straight west..
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Re: ATL: IRMA - Models

#4516 Postby WHYB630 » Sun Sep 03, 2017 5:07 pm

16z GFS @ 132hrs: significantly weaker ridge compare to 12z's run
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Re: ATL: IRMA - Models

#4517 Postby WeatherEmperor » Sun Sep 03, 2017 5:08 pm

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A north turn soon??? Between 132 and 138 it barely moved west...just barely


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Re: ATL: IRMA - Models

#4518 Postby KWT » Sun Sep 03, 2017 5:08 pm

It sure is trending closer and closer on the GFS to Florida, only going to need slight adjustments to end up hitting Hispaniola as well. The ECM I see delivered the miracle run but I don't think that will happen if I'm honest.
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Re: ATL: IRMA - Models

#4519 Postby northjaxpro » Sun Sep 03, 2017 5:08 pm

As we have discussed earlier today, the very disturbing SW shift continues in the 18Z GFS run. This is not good at all!
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Re: ATL: IRMA - Models

#4520 Postby Frank P » Sun Sep 03, 2017 5:09 pm

Aric Dunn wrote:126 to 138 its moving straight west..

looks WNW to me Aric..
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