ATL: IRMA - Models

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Ntxw
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Re: ATL: IRMA - Models

#6261 Postby Ntxw » Mon Sep 04, 2017 6:27 pm

1900hurricane wrote:This is a good point, and I certainly remain skeptical of the extreme solutions, but it's also worth pointing out that such pressures are actually in the realm of possibility this go around. Unlike with Noru and Kulap's <880 mb intensity solutions above 30ºN which could almost immediately be discounted, this is being modeled in one of the few areas in the NAtl which could support such a pressure, which makes it a little more difficult to determine how much the extreme solutions can be attributed to over-intensification bias.


It's hard to go below 900mb and usually guidance doesn't catch a system that does. But you're right though this is one of the few areas in the WHEM that can go that low so far north. Even if you take the more reserved Euro which was too high for Harvey even you are still looking at sub 920s which is no walk in the park in itself...
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Re: ATL: IRMA - Models

#6262 Postby gatorcane » Mon Sep 04, 2017 6:29 pm

18Z HWRF shifts north. May not landfall in Cuba like previous runs:

Image
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Re: ATL: IRMA - Models

#6263 Postby ronjon » Mon Sep 04, 2017 6:30 pm

BucMan2 wrote:Hey Ronjon-

What might the Tampa Bay Area see with a track up the spine?
Still possible for it to run up the West Coast?


Sure think the jury's still out on that - ensembles from GFS and EC suggest a track up into the SE GOM. Need a couple more cycles of model runs to pin it down.

If the storm tracks east of us, winds blow offshore so no surge. Wind damage, heavy rainfall, and tornadoes would be our biggest threats.
Last edited by ronjon on Mon Sep 04, 2017 6:32 pm, edited 1 time in total.
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Re: ATL: IRMA - Models

#6264 Postby GTStorm » Mon Sep 04, 2017 6:30 pm

So which models are doing the best with intensity?
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Re: ATL: IRMA - Models

#6265 Postby Alyono » Mon Sep 04, 2017 6:30 pm

GTStorm wrote:So which models are doing the best with intensity?


sadly, the HWRF and HMON
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Re: ATL: IRMA - Models

#6266 Postby RL3AO » Mon Sep 04, 2017 6:31 pm

Alyono wrote:
GTStorm wrote:So which models are doing the best with intensity?


sadly, the HWRF and HMON


I did find out the HMON isn't coupled in the Atlantic. They had to disable it because it didn't test well.
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Re: ATL: IRMA - Models

#6267 Postby invest man » Mon Sep 04, 2017 6:32 pm

Hurricane Andrew wrote:00z runs tonight with Gonzo/balloon data are going to be important...still at the D5-D7 range, so nothing is set in stone.

Do you know what time that will run? IM
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Re: ATL: IRMA - Models

#6268 Postby SouthFLTropics » Mon Sep 04, 2017 6:35 pm

invest man wrote:
Hurricane Andrew wrote:00z runs tonight with Gonzo/balloon data are going to be important...still at the D5-D7 range, so nothing is set in stone.

Do you know what time that will run? IM


Starting about 11:30PM EDT with the GFS 00z
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Re: ATL: IRMA - Models

#6269 Postby WeatherHoon » Mon Sep 04, 2017 6:37 pm

sma10 wrote:
gatorcane wrote:18Z GFS ensembles split into two camps:

https://s26.postimg.org/zbw5sya2x/gfs-e ... atl_24.png


...and they have been in these two camps for awhile strangely.

Scary run for SFL, but if you're looking for good news, at least there seemed to be a subtle early shift to the north and northwest. Perhaps the start of a trend? Or was it not a true shift, but rather just a speeding up of forward speed?


Not sure if slight adjustments to the W/NW would matter that much. It looks like it's coming down to where it stops its WEST/WNW movement before the straight shot North.
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Re: ATL: IRMA - Models

#6270 Postby TheStormExpert » Mon Sep 04, 2017 6:37 pm

gatorcane wrote:18Z GFS ensembles split into two camps:

Image

Hmmm... Maybe more west or east shifts?
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Re: ATL: IRMA - Models

#6271 Postby capepoint » Mon Sep 04, 2017 6:37 pm

When will they start getting some actual upper sampling from out west, to give the models a firm grasp of the cold front/trough?
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Re: ATL: IRMA - Models

#6272 Postby Steve » Mon Sep 04, 2017 6:38 pm

HWRF snuck in the 90 hour solution. It's at:

22.25N 73.95W and 929mb so Cat 4. Let me interrupt this post to say that I haven't typed Cat 4 or Category 4 as much in my entire life as I have with Irma. You guys know I'm a call it as I see it poster. Bad news. Question is will HWRF again hit Cuba or will it ride a bit north this time and not "weaken" into the 940's or 950's.

While I was typing that in 96 hours popped up:
about 22.7N 75.2W @ 929mb

Last run at 96 Hours and 102 (to compensate for now)

96
21.1N 74.1N @ 934 (so a degree south and east)

120
21.9N 79.6W @ 952mb and over Cuba

^^^ Meant to type 102 but we can see the 120 benchmark change once it runs

102 Hours
12Z - 21.3N 75.5W
Last edited by Steve on Mon Sep 04, 2017 6:43 pm, edited 2 times in total.
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Re: ATL: IRMA - Models

#6273 Postby MrJames » Mon Sep 04, 2017 6:38 pm

Interesting split for the 18z GFS ensembles.

Image
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Re: ATL: IRMA - Models

#6274 Postby caneseddy » Mon Sep 04, 2017 6:39 pm

For everyone asking whether any new data made it to the 18z GFS, see below

 https://twitter.com/EricBlake12/status/904833383888453639


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Re: ATL: IRMA - Models

#6275 Postby bella_may » Mon Sep 04, 2017 6:40 pm

MrJames wrote:Interesting split for the 18z GFS ensembles.

https://i.imgur.com/irF3nN7.png


That's a pretty big west shift... was only a small percentage in the gulf a few days ago
Last edited by Ntxw on Mon Sep 04, 2017 6:42 pm, edited 1 time in total.
Reason: Removed img tags
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Re: ATL: IRMA - Models

#6276 Postby NJWxHurricane » Mon Sep 04, 2017 6:43 pm

caneseddy wrote:For everyone asking whether any new data made it to the 18z GFS, see below

https://twitter.com/EricBlake12/status/ ... 3888453639

00Z not 18z
Last edited by Ntxw on Mon Sep 04, 2017 6:44 pm, edited 1 time in total.
Reason: Removed img tags
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Re: ATL: IRMA - Models

#6277 Postby caneseddy » Mon Sep 04, 2017 6:46 pm

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Re: ATL: IRMA - Models

#6278 Postby Steve » Mon Sep 04, 2017 6:47 pm

LOL. I need to hook Levi up with a donation. I'll do that this week when I get back to work.

Come on HWRF. Keep running!

OOOO. Out to 111 which snuck in. Squeezed appearance as it only seems to get minimal interruption from Cuba so far. It's at 931 and may miss it which is terrible news down the line.
https://www.tropicaltidbits.com/analysi ... 418&fh=111
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Re: ATL: IRMA - Models

#6279 Postby SouthFLTropics » Mon Sep 04, 2017 6:48 pm

111 hours...much more North than 12z

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Re: ATL: IRMA - Models

#6280 Postby SouthFLTropics » Mon Sep 04, 2017 6:49 pm

HWRF Trend

Image
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