ATL: FLORENCE - Models

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txwatcher91
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Re: ATL: FLORENCE - Models

#441 Postby txwatcher91 » Tue Sep 04, 2018 1:26 pm

plasticup wrote:
txwatcher91 wrote:Meanwhile the CMC has for several runs now shown a near miss or coastal scraper for NC/VA area.
Image

It gets there via a blocking high at 25N. That is so different from the model consensus and so near in the future (it diverges around 78-90 hours) that it is hard to take seriously.


Yeah the CMC scenario is not likely to occur but it shows there is still a bit of disagreement with the models. GFS has led the way on this one though and has outperformed other models with the intensity it's shown and the track. Similar to Lane, I think the GFS will be the winner again here.
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Re: ATL: FLORENCE - Models

#442 Postby Kazmit » Tue Sep 04, 2018 1:32 pm

12z Euro shifted west, but not enough to impact Bermuda.
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Re: ATL: FLORENCE - Models

#443 Postby LarryWx » Tue Sep 04, 2018 1:33 pm

12Z Euro is for the 2nd time in a row OTS and misses Bermuda to the east though it is a little closer to Bermuda.
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Re: ATL: FLORENCE - Models

#444 Postby gatorcane » Tue Sep 04, 2018 2:53 pm

Ok stop that UKMET: :double:

Image

12Z Euro ensembles back to a cluster of ensembles taking this West to SE US coast:

Image
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Re: ATL: FLORENCE - Models

#445 Postby Nimbus » Tue Sep 04, 2018 3:02 pm

Hopefully the model runs will stop showing Florence missing the weakness by tomorrow, this is kind of basic for any kind of forecast integrity.
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Re: ATL: FLORENCE - Models

#446 Postby Cunxi Huang » Tue Sep 04, 2018 3:15 pm

[i mg]http://76.167.74.185/owncloud/index.php/s/PcsafZES3vLALe1/download[/img]

oh man, what are these.
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Re: ATL: FLORENCE - Models

#447 Postby LarryWx » Tue Sep 04, 2018 3:26 pm

A further update on the 12Z EPS. Main message: still way too soon for all clear for SE US.

The crucial longitude point is near 60W and the crucial day is ~ Sunday 9/9. That's when ~2/3 of the 51 members, the ones north of 30N, then recurve safely into the north Atlantic. However, ~1/3 of them, which are then located 25-30N and which average somewhat weaker than the recurvers further to the north, stop their northward move and turn left/west due to being trapped by a ridge. Then whereas a few just mill around, the majority of that 1/3 become SE US threats with a whopping 9 TS+ members hitting (almost all Hs), the most of any recent run. Also, there are 2 other members with Hs not far offshore NC at the end of the run. Most (6) of these 9 hits are earlier, 9/12-14: 4 hit near SC/NC border and the other 2 hit near Daytona Beach. However, 3 of them are much later (yes they are from Florence, not the followup which itself hits FL with Hs from 3 members) 9/18-9: 2 hit SC and 1 hits S FL. In addition, one of the earlier 6 H hits comes back offshore and then re-hits the SE with a H on 9/17 at the FL/GA border.
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Re: ATL: FLORENCE - Models

#448 Postby LarryWx » Tue Sep 04, 2018 3:57 pm

I don't have a link, but I just saw a post elsewhere that showed the 12Z UKMET ensembles. They're quite concerning as most of them pass 60W south of 30N and on a westward trajectory just like their operational that Gator posted. :eek:
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Re: ATL: FLORENCE - Models

#449 Postby Aric Dunn » Tue Sep 04, 2018 4:43 pm

I would not rule out any scenario at this point.

the 12z yesterday which takes aim at the SE has a more progressive trough over the Canadian maritime. Today's 12z has a slower and more broken trough with multiple lobes ( shortwaves) that swing through during the same time frame which keeps the weakness in place. 12z yesterday had a single larger trough that drops in and lifts out allowing the ridging to build back.

the breaking apart of this trough is key and at this point is too early to tell.

Also gordon will play a role in the placement of the east coast ridge..

and as others have mentioned we dont want a weaker florence.
Last edited by Aric Dunn on Tue Sep 04, 2018 4:50 pm, edited 1 time in total.
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Re: ATL: FLORENCE - Models

#450 Postby Kingarabian » Tue Sep 04, 2018 4:49 pm

LarryWx wrote:I don't have a link, but I just saw a post elsewhere that showed the 12Z UKMET ensembles. They're quite concerning as most of them pass 60W south of 30N and on a westward trajectory just like their operational that Gator posted. :eek:


12z UKMET Ens:
Image
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Re: ATL: FLORENCE - Models

#451 Postby AutoPenalti » Tue Sep 04, 2018 4:59 pm

Image

GFS trend...
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Model Runs Cheat Sheet:
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HWRF, GFDL, UKMET, NAVGEM (6:30-8:00 AM/PM, 12:30-2:00 AM/PM)
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Re: ATL: FLORENCE - Models

#452 Postby AutoPenalti » Tue Sep 04, 2018 5:03 pm

Ridge collapses at hour 90...will it sniff it out?

Image
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ECMWF (1:45 AM/PM)

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Re: ATL: FLORENCE - Models

#453 Postby SouthFLTropics » Tue Sep 04, 2018 5:09 pm

Florence should head into the weakness...That's a pretty big exit that has been left there. One thing to note though is the 18z position is well South of the 12z position.

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Re: ATL: FLORENCE - Models

#454 Postby SFLcane » Tue Sep 04, 2018 5:12 pm

SouthFLTropics wrote:Florence should head into the weakness...That's a pretty big exit that has been left there. One thing to note though is the 18z position is well South of the 12z position.

SFT


I concur that’s pretty a substantial weakness for Florence to easily recurve and also her buddies should follow.
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Re: ATL: FLORENCE - Models

#455 Postby AutoPenalti » Tue Sep 04, 2018 5:13 pm

Nearly stationary.

Image
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Re: ATL: FLORENCE - Models

#456 Postby AxaltaRacing24 » Tue Sep 04, 2018 5:17 pm

Moving a tick west still but very slow

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Last edited by AxaltaRacing24 on Tue Sep 04, 2018 5:18 pm, edited 3 times in total.
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Re: ATL: FLORENCE - Models

#457 Postby SouthFLTropics » Tue Sep 04, 2018 5:17 pm

18z is a BIG SW shift from 12z at 138 hours. The magic exit door may be closing.
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Re: ATL: FLORENCE - Models

#458 Postby AutoPenalti » Tue Sep 04, 2018 5:17 pm

Uh oh, look at the ridge building off the Carolinas...

Image
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Model Runs Cheat Sheet:
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ECMWF (1:45 AM/PM)

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Re: ATL: FLORENCE - Models

#459 Postby AxaltaRacing24 » Tue Sep 04, 2018 5:23 pm

The door has been closed. Major shift!

Image
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Re: ATL: FLORENCE - Models

#460 Postby toad strangler » Tue Sep 04, 2018 5:24 pm

Jiminy Crickets :eek:
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