Tropical Wave in Eastern Caribbean

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Hurricaneman
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Re: Strong Tropical Wave in Western Africa

#61 Postby Hurricaneman » Thu Jul 06, 2017 11:50 pm

Hypercane_Kyle wrote:00z GFS remaining quite vigorous with the wave in question once it reaches the Caribbean.

JMO, likely convective feedback. The GFS did the same exact thing with TD 4.


Hopefully it's convective feedback or this needs to be watched in the next week to 10 days
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Re: Strong Tropical Wave in Western Africa

#62 Postby Dylan » Thu Jul 06, 2017 11:52 pm

Hypercane_Kyle wrote:00z GFS remaining quite vigorous with the wave in question once it reaches the Caribbean.

JMO, likely convective feedback. The GFS did the same exact thing with TD 4.


I guess the European-Parallel has convective feedback issues as well. :roll:
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Re: Strong Tropical Wave in Western Africa

#63 Postby Hurricaneman » Thu Jul 06, 2017 11:54 pm

Dylan wrote:
Hypercane_Kyle wrote:00z GFS remaining quite vigorous with the wave in question once it reaches the Caribbean.

JMO, likely convective feedback. The GFS did the same exact thing with TD 4.


I guess the European-Parallel has convective feedback issues as well. :roll:

Makes me think this could be a real threat to the lesser Antilles the next 7 to 10 days
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Re: Strong Tropical Wave in Western Africa

#64 Postby Alyono » Thu Jul 06, 2017 11:59 pm

convective feedback should be banned on this forum as most misuse it and have no clue what it even means

Now, there are some serious issues with this MU run that gives me pause regarding its dynamics. Weakening in the Gulf under a large ridge of high pressure? Seriously?
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Re: Strong Tropical Wave in Western Africa

#65 Postby Dylan » Fri Jul 07, 2017 12:00 am

Hurricaneman wrote:
Dylan wrote:
Hypercane_Kyle wrote:00z GFS remaining quite vigorous with the wave in question once it reaches the Caribbean.

JMO, likely convective feedback. The GFS did the same exact thing with TD 4.


I guess the European-Parallel has convective feedback issues as well. :roll:

Makes me think this could be a real threat to the lesser Antilles the next 7 to 10 days


The GFS has a tropical storm as soon as Tuesday. If the models continue to come on with this, we could see the NHC use the yellow crayon by this weekend.
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Re: Strong Tropical Wave in Western Africa

#66 Postby Hurricaneman » Fri Jul 07, 2017 12:00 am

Alyono wrote:convective feedback should be banned on this forum as most misuse it and have no clue what it even means

Now, there are some serious issues with this MU run that gives me pause regarding its dynamics. Weakening in the Gulf under a large ridge of high pressure? Seriously?


Agreed, if anything that would more than likely be a nasty hurricane
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Re: Strong Tropical Wave in Western Africa

#67 Postby Kingarabian » Fri Jul 07, 2017 12:13 am

Alyono wrote:convective feedback should be banned on this forum as most misuse it and have no clue what it even means

Now, there are some serious issues with this MU run that gives me pause regarding its dynamics. Weakening in the Gulf under a large ridge of high pressure? Seriously?


Probably some unforeseen shear that is not charted well on the GFS shear map.

The Euro Parallel was hinting at a very strong ridge. It made landfall over Venezuela then tried to do it again before brushing the ABC islands.
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Re: Strong Tropical Wave in Western Africa

#68 Postby Kingarabian » Fri Jul 07, 2017 12:20 am

GFS Parallel develops this. In the EPAC.
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Re: Strong Tropical Wave in Western Africa

#69 Postby Hypercane_Kyle » Fri Jul 07, 2017 12:28 am

Alyono wrote:convective feedback should be banned on this forum as most misuse it and have no clue what it even means


I apologize for using an incorrect and inaccurate term.

Guess we'll see what the models are showing in the AM... ECMWF operational has developed this system before in the past, but only for one run. It'll be interesting to see if the ECMWF-parallel is a prelude to the operational jumping onboard.
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Re: Strong Tropical Wave in Western Africa

#70 Postby AutoPenalti » Fri Jul 07, 2017 12:47 am

There will come a time in the (near?) future when model runs from 200+ hrs out will become accurate enough in consecutive runs to the point where terms like "convective feedback" will become obsolete.

By that logic, anxiety levels would plummet completely. :lol:
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Re: Strong Tropical Wave in Western Africa

#71 Postby Alyono » Fri Jul 07, 2017 12:53 am

AutoPenalti wrote:There will come a time in the (near?) future when model runs from 200+ hrs out will become accurate enough in consecutive runs to the point where terms like "convective feedback" will become obsolete.

By that logic, anxiety levels would plummet completely. :lol:


models have been accurate that far out recently. Matthew and Cindy were well forecast that far out
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Re: Strong Tropical Wave in Western Africa

#72 Postby Ivanhater » Fri Jul 07, 2017 1:38 am

00Z Euro now showing an intensifying hurricane approaching the Islands
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Re: Strong Tropical Wave in Western Africa

#73 Postby wxmann_91 » Fri Jul 07, 2017 1:39 am

0Z Euro now shows development as well through 168 hr.

EDIT: dangit, ninja'd!
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Re: Strong Tropical Wave in Western Africa

#74 Postby Dylan » Fri Jul 07, 2017 1:43 am

Thats a pretty strong signal, with the GFS/GFS Ensembles, ECMWF, and ECMWF-Parallel all showing a hurricane approaching the Lesser Antilles in a little over a week. Only recent thing that is comparable is Emily in July 2005.
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Re: Strong Tropical Wave in Western Africa

#75 Postby Dylan » Fri Jul 07, 2017 1:46 am

Significant disagreement between the GFS & European on the 500mb synoptic pattern over the Continental North America.
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Re: Strong Tropical Wave in Western Africa

#76 Postby Ivanhater » Fri Jul 07, 2017 1:49 am

00Z Euro has an intensifying Major Hurricane strike on the Lesser Antilles at 216 hours
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Re: Strong Tropical Wave in Western Africa

#77 Postby Alyono » Fri Jul 07, 2017 1:59 am

957mb on the full res at the end of the run

Not only would this cause severe wind damage, but catastrophic flood damage as it is not moving fast at all
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Re: Strong Tropical Wave in Western Africa

#78 Postby AutoPenalti » Fri Jul 07, 2017 2:00 am

Ivanhater wrote:00Z Euro has an intensifying Major Hurricane strike on the Lesser Antilles at 216 hours

Presumably located a bit south of the Herbert Box?


EDIT: Looks like it's starts to turn poleward right at the end of the run.
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The posts in this forum are NOT official forecasts and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or STORM2K. For official information, please refer to products from the NHC and NWS.


Model Runs Cheat Sheet:
GFS (5:30 AM/PM, 11:30 AM/PM)
HWRF, GFDL, UKMET, NAVGEM (6:30-8:00 AM/PM, 12:30-2:00 AM/PM)
ECMWF (1:45 AM/PM)

TCVN
is a weighted averaged

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Re: Strong Tropical Wave in Western Africa

#79 Postby Kingarabian » Fri Jul 07, 2017 2:30 am

Dylan wrote:Significant disagreement between the GFS & European on the 500mb synoptic pattern over the Continental North America.


It's interesting that the Euro has shifted considerably towards the JMA.

Japanese model in its steering patterns is showing low pressures
that extend well off the eastern seaboard (weakness). It's hard to imagine anything getting past the eastern Caribbean with that kind of setup.

So if it's going to affect land areas, how fast it develops is the key factor as a weaker system will move more west.
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Re: Strong Tropical Wave in Western Africa

#80 Postby USTropics » Fri Jul 07, 2017 2:47 am

The CFS has consistently shown lowering pressures in this area for the past 4 runs now:

Image
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