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Tropical Atlantic 2015 speculation/action


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Sheesh...23 knots of shear as of 12z. Good thing this year is the year of the pathetic naked swirl.

 

The MPI in that region is 894mb which is a nice differential of 115mb from the current intensity. 

Max Pot Int (MPI,from Emanuel) : 894.0 hPa
MPI differential (MSLP-MPI) : 115.0 hPa

CIMSS Vertical Shear Magnitude : 12.2 m/s
Direction : 308.7 deg
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Looking at the loop doesn't it look like a new center wants to form under the deep convection and the naked swirl will just slowly die as it moves west?

The turning to the southeast of TD 11 is the decoupled mid level low. Most of the time the convection slowly dies if there's no low level support, especially with a still very well defined LLC. My bet is that new convection will start to fire near or just east of the exposed low level low.

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The turning to the southeast of TD 11 is the decoupled mid level low. Most of the time the convection slowly dies if there's no low level support, especially with a still very well defined LLC. My bet is that new convection will start to fire near or just east of the exposed low level low.

The 12z UKmet does some weird things with this system that somewhat agree with current trends.

http://meteocentre.com/models/get_panel.php?mod=ukmet&run=12&stn=PNMPR&mode=latest&map=na〈=en&hh=000

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Surprised this board isn't getting more action this afternoon. We have both major Hurricane models showing a potent storm traveling into Long Island, the European which shoes a Cat 1 Storm hitting the Mid Atlantic with a Sandy like track, and ALL models showing extreme amounts of rainfall for New England with widespread 5-10 inch amounts. 

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Surprised this board isn't getting more action this afternoon. We have both major Hurricane models showing a potent storm traveling into Long Island, the European which shoes a Cat 1 Storm hitting the Mid Atlantic with a Sandy like track, and ALL models showing extreme amounts of rainfall for New England with widespread 5-10 inch amounts. 

Probably because the typical tropical snob rolls his eyes at a setup like this. They want a landfalling hurricane along the Gulf.

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Surprised this board isn't getting more action this afternoon. We have both major Hurricane models showing a potent storm traveling into Long Island, the European which shoes a Cat 1 Storm hitting the Mid Atlantic with a Sandy like track, and ALL models showing extreme amounts of rainfall for New England with widespread 5-10 inch amounts. 

 

The extreme rain is from 99L getting dragged along the front, but the insane ECM/HWRF/GFDL solutions are from TD11

 

Just to clarify. 

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Concerning on the one hand given the UA pattern, but the system has a long battle ahead of it, so am not putting stock in the perilous GFDL and HWRF intensity forecasts. Potential for heavy rain is uppermost in my mind, even without a direct strike, given the front retrograding back toward us from offshore and interacting with tropical moisture.

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The upper level anticyclone, currently centered around S FL, will start to migrate NE, to the NE of the Bahamas, while a deep trough sweeps it's way towards the E CONUS. Models have been trending farther to the left with TD 11, which means they are now much closer to where the anticyclone will be, hence why the models are showing a stronger depiction of what is now TD 11, since the shear is forecasted to diminish significantly.

 

Not saying that's going to happen, but there's a valid possibility we see a hurricane out of TD 11 and a possible east coast threat.

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The upper level anticyclone, currently centered around S FL, will start to migrate NE, to the NE of the Bahamas, while a deep trough sweeps it's way towards the E CONUS. Models have been trending farther to the left with TD 11, which means they are now much closer to where the anticyclone will be, hence why the models are showing a stronger depiction of what is now TD 11, since the shear is forecasted to diminish significantly.

 

Not saying that's going to happen, but there's a valid possibility we see a hurricane out of TD 11 and a possible east coast threat.

 

Exactly, recon shows the LLC trying to retrograde back into the convection per the latest pass. If this can stall out and get underneath the ULAC like the UKMET/HWRF suggest, then 11L has a shot at becoming a decent system. Something to watch as this is probably one of the last real tropical threats we'll see this season. 

 

Individual ECM members per Dr. Ryan Maue 

ScreenHunter_195%20Sep.%2028%2016.27.png

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I gave some crap this AM for posting outlier model runs, but I'm officially intrigued here.  Lots of shear to get through first, but a very worrisome upper air pattern for homebrew landfall on the EC.  This plus 99L is a perfect storm for heavy rain, and SSTs along the EC are anomalously high, especially N of 30N.

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