Tropical Wave in East Atlantic (Is Invest 97L)

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Re: Tropical Wave in East Atlantic (Pouch 39L)

#681 Postby 1900hurricane » Sat Sep 24, 2016 4:12 am

wxmann_91 wrote:
1900hurricane wrote:I would strongly caution against taking the model output as verbatim (in any situation), but there is lots of useful information that can be gleaned from these series of runs.


Always enjoy your posts, 1900hurricane... what particular useful tidbits of information are you referring to?

There are a few things that jump out at me. The sheer consistency of the GFS makes me believe that this is likely to enter the western Caribbean, despite questions that usually start cropping up at the larger taus. Ensemble support doesn't hurt either, with the GEFS and a good number of EPS members showing a modeled system in the same general vicinity of the operational GFS at tau 240. The mid latitude flow is not the most predictable right now, but my bets are that the system will remain embedded far enough below subtropical ridging that the inconsistencies in mid-latitude flow won't be a factor earlier in the system's life.

It's also worth noting that the globals in general have an over-intensification bias in subtropical and middle latitudes. We've seen that come into play this year with storms like Conson, Gaston, Lionrock, and Karl. However, this is not a prevalent bias at the tropical latitudes the Caribbean is at. I still do believe that the GFS intensities may be overdone due to it getting an early jump in intensification in the eastern Caribbean, but overall, the higher intensities are much more believable in this scenario. As I mentioned before, this system is ticking off a lot of the checkmarks I usually have for when I'm trying to determine if the Tropical Western Pacific is going to spit out another super typhoon. I am very intrigued by this system right now and will continue to be watching it closely.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#682 Postby abajan » Sat Sep 24, 2016 4:55 am

5-Day Formation Chance Up to 30%

TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
200 AM EDT SAT SEP 24 2016

For the North Atlantic...Caribbean Sea and the Gulf of Mexico: ...

A tropical wave, accompanied by a broad area of low pressure, is
located south of the Cabo Verde Islands. This disturbance is
expected to move rapidly westward across the tropical Atlantic Ocean
at 20 to 25 mph for the next several days. Environmental conditions
are expected to be conducive for gradual development when the system
approaches the Lesser Antilles by the middle of next week.
* Formation chance through 48 hours...low...near 0 percent
* Formation chance through 5 days...low...30 percent

Forecaster Stewart

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Re: Tropical Wave in East Atlantic (Pouch 39L)

#683 Postby SFLcane » Sat Sep 24, 2016 5:29 am

Wilma vibes here in terms of track after 00z run but plenty of time to go.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#684 Postby gatorcane » Sat Sep 24, 2016 5:32 am

toad strangler wrote:Fantasy range landfall in the FL Big Bend E of where Hermine went in.

http://i218.photobucket.com/albums/cc10 ... atl_52.png


That is more east of where Hermine went in and that would be catastrophic for the Tampa area. Also as SFLcane mentions, Wilma vibes for sure on that 00z GFS track :eek:

One thing that is interesting, the GFS has shown a sharp recurve in the long-range in the last two runs which is closer to climo.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#685 Postby cycloneye » Sat Sep 24, 2016 5:34 am

The latest data from the pouch group.

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http://www.met.nps.edu/~mtmontgo/storms2016/P39L.html
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#686 Postby SouthFLTropics » Sat Sep 24, 2016 5:35 am

Ridge seems weaker on the 06z GFS. This may end up being a peninsula threat this run.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#687 Postby gatorcane » Sat Sep 24, 2016 5:36 am

The 06Z GFS is nearly identical to the 00Z GFS at hour 222 on track and strength. Wow the GFS is insistent this becomes a big-time storm in the Caribbean.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#688 Postby SouthFLTropics » Sat Sep 24, 2016 5:38 am

gatorcane wrote:The 06Z is nearly identical to the 00Z GFS at hour 222 on track and strength. Wow.


Look at the upper air pattern over the CONUS. Ridge is displaced further East. This is going to recurve sooner than 00z.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#689 Postby gatorcane » Sat Sep 24, 2016 5:42 am

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Re: Tropical Wave in East Atlantic (Pouch 39L)

#690 Postby gatorcane » Sat Sep 24, 2016 5:45 am

SouthFLTropics wrote:
gatorcane wrote:The 06Z is nearly identical to the 00Z GFS at hour 222 on track and strength. Wow.


Look at the upper air pattern over the CONUS. Ridge is displaced further East. This is going to recurve sooner than 00z.


Perhaps, 240 hours, thin ridge over Florida seems to be eroding.

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Re: Tropical Wave in East Atlantic (Pouch 39L)

#691 Postby gatorcane » Sat Sep 24, 2016 5:48 am

276 hours and the 06z is even stronger than 00Z. Shortwave coming down from Midwest :eek:

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Last edited by gatorcane on Sat Sep 24, 2016 5:49 am, edited 1 time in total.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#692 Postby SouthFLTropics » Sat Sep 24, 2016 5:48 am

Yucatan Channel and here comes the recurve. Decent trough digging across Texas.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#693 Postby gatorcane » Sat Sep 24, 2016 5:51 am

Big Bend about get leveled with a CAT 5

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Re: Tropical Wave in East Atlantic (Pouch 39L)

#694 Postby SouthFLTropics » Sat Sep 24, 2016 5:53 am

gatorcane wrote:Tampa about to get leveled

Image


It may go Big Bend again. Trough is oriented more north/south versus NE/SW. If this was even a week later the trough would dig further and it would turn more towards the peninsula.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#695 Postby gatorcane » Sat Sep 24, 2016 5:55 am

Yeah Big Bend again. Also remarkable that it is the same spot as where the 00Z made landfall. Obviously we are talking so far out in the long-range, this will likely all change. Best to be in the GFS target zone this far out. Last three GFS runs are showing recurve with the last two across Eastern Gulf.
Last edited by gatorcane on Sat Sep 24, 2016 5:56 am, edited 1 time in total.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#696 Postby jlauderdal » Sat Sep 24, 2016 5:56 am

SouthFLTropics wrote:
gatorcane wrote:Tampa about to get leveled



It may go Big Bend again. Trough is oriented more north/south versus NE/SW. If this was even a week later the trough would dig further and it would turn more towards the peninsula.


GFS just loves to hit Florida with big systems..it must be written into the code that at least one run of every system puts a major into Florida...usually I-4 corridor or south :roll:
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#697 Postby cycloneye » Sat Sep 24, 2016 5:56 am

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Re: Tropical Wave in East Atlantic (Pouch 39L)

#698 Postby SouthFLTropics » Sat Sep 24, 2016 5:57 am

I'll tell you what is unnerving...the run to run consistency of the models developing something big and also the fact that none have shown a peninsula hit as of yet. At 240+ hours I generally like to be the target because it's bound to change. So far, we haven't been targeted yet.
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Re: Tropical Wave in East Atlantic (Pouch 39L)

#699 Postby cycloneye » Sat Sep 24, 2016 5:57 am

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Re: Tropical Wave in East Atlantic (Pouch 39L)

#700 Postby gatorcane » Sat Sep 24, 2016 6:00 am

So looking at all of the global models, every one of them develops this. Might be 30% for now but that NHC percent number is going up

http://ruc.noaa.gov/hfip/tcgen/
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