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Hurricane Irma


downeastnc

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The part that really sucks is this thing is at best 12 or so days away from any impact it might have on the US, thats a long time to fret over model runs lol....and until we see a wholesale change in the upper level setup it looks like most of those runs will be threats to the US....the Euro is also weaker with the system overall and this also might be why its further south with it, a deep strong cane is gonna want to go north more so that might lend the GFS solution a little more weight if the storm actually bombs into a Cat 4/5. 

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And pin the thread. Fixing to get alot of traffic next week. Amazing at euro and ukmet forecasting that ridge so strong and now gfs caving. Very likely this is gonna effect conus. Biggest hope we have is it hitting speed bump DR, PR, Honduras. Otherwiis it's gonna be lights out for some folks somewhere between Texas to any where on east coast. That's up in the air, but Irma is  coming to the neighborhood just a matter of who's doorbell gets rung.

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The GFS has the SW turn east of the islands but then it turns NW as soon as its done moving SW passing well north of the islands...kinda crazy that the storm would turn that fast...at hr 96 its headed SW by 108 its already got a NW motion to it....but if you run the loop from this frame you will see why, look to its NW north of the greater Antilles. The Euro doesnt have that at all thus more west. 

https://www.tropicaltidbits.com/analysis/models/?model=gfs&region=atltropics&pkg=z500_vort&runtime=2017083112&fh=126&xpos=0&ypos=100

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8 minutes ago, downeastnc said:

The GFS has the SW turn east of the islands but then it turns NW as soon as its done moving SW passing well north of the islands...kinda crazy that the storm would turn that fast...at hr 96 its headed SW by 108 its already got a NW motion to it....but if you run the loop from this frame you will see why, look to its NW north of the greater Antilles. The Euro doesnt have that at all thus more west. 

https://www.tropicaltidbits.com/analysis/models/?model=gfs&region=atltropics&pkg=z500_vort&runtime=2017083112&fh=126&xpos=0&ypos=100

Big hurricanes don't turn fast...They barrow forward.

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9 minutes ago, Eskimo Joe said:

GFS probably over deepening the low and trying to turn it poleward quicker.  If the ridge was weak sauce I'd be a bit more inclined to believe it, but not with a stout high to the north.

It has the ULL out in front of it north of the islands run the last 4 GFS runs with 500mb vort map and you can see how the strength/timing of that really steers the storm.....the Euro doesnt have that ULL at all, neither does the CMC ( well its there just weaker )  and its further west though it stalls and appears to want to go north at the end of the run at 12Z but its much further SW this run versus last. If the GFS drops the ULL it would be much further west too...will be something to watch to see who has that right. 

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3 minutes ago, griteater said:

In opposition to the GFS, Mike Ventrice says "the best Euro Ensemble members via initialization score are west of the ensemble mean track, taking Irma into the Gulf of Mexico"

Tough to argue with the Euro but if there is a caveat it appears the Euro is much weaker with the storm overall....a stronger system will want to pull north more. Really though it will be Tues or Wed next week before model runs will be close enough to put a landfall inside of 7 days and until then I imagine there will be much disagreement and changes in the model runs as the upper level pattern comes into better range. 

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3 hours ago, frazdaddy said:

Hazel is the only cat4 for NC I think. We seem to be having an uptick in "rare" events of late though.

NC Hurricane History book by Jay Barnes lists three CAT 4 hurricanes with NC landfall...

Unnamed, Aug 1879, 168 MPH, Southport up thru Topsail Island

Hazel, Oct 1954, 150 MPH, Holden Beach

Unnamed, Aug 1899, 140 MPH, just east of Beaufort

Max winds noted are listed as estimates for each storm at landfall

 

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1 hour ago, jburns said:

Add the fact that as of this morning we have this complication.

The Colonial Pipeline, which carries huge amounts of gasoline and other fuel between Houston and the East Coast, is shutting down after Harvey forced the closure of refineries and some of the pipeline's own facilities.

The pipeline has two main lines that together transport more than 100 million gallons of gasoline, heating oil and aviation fuel as far as the New York harbor each day.

Saw an article on this and a gas "expert" said as soon as the pipelines start back up, prices would rapidly fall! Gonna have to call BS on that one!

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3 minutes ago, packfan98 said:

 Current map here. GFS breakdown at ATL ridge, a known bias likely taking over. Here is my idea from am

DIkxSAoXoAA5QiM.jpg

So basically JB is predicting a landfalling Cat 3/4 storm with maybe a 5% chance of escape.  Still 50/50 which side of FL takes the hit.  About the worst possible case either way.  

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Just now, kvegas-wx said:

So basically JB is predicting a landfalling Cat 3/4 storm with maybe a 5% chance of escape.  Still 50/50 which side of FL takes the hit.  About the worst possible case either way.  

Looks like the best hope is for it to have as much land interaction as possible to keep it weaker.  If it goes too far south, it will end up in the gulf as a powerhouse system.  

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1 hour ago, NCSNOW said:

And pin the thread. Fixing to get alot of traffic next week. Amazing at euro and ukmet forecasting that ridge so strong and now gfs caving. Very likely this is gonna effect conus. Biggest hope we have is it hitting speed bump DR, PR, Honduras. Otherwiis it's gonna be lights out for some folks somewhere between Texas to any where on east coast. That's up in the air, but Irma is  coming to the neighborhood just a matter of who's doorbell gets rung.

That may be your biggest hope, but I'm pretty sure the people living on those islands would not see it the same way:  "Please, please, Irma, plow right over the top of us so that by our sacrifice we might decrease the amount of suffering experienced by our very dear neighbors to the north."  :D:P

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40 minutes ago, kvegas-wx said:

So basically JB is predicting a landfalling Cat 3/4 storm with maybe a 5% chance of escape.  Still 50/50 which side of FL takes the hit.  About the worst possible case either way.  

JB cone is fine on the west side but needs to be extended east.  He has the cone barely east of Hatteras.  Like people have said a stronger cane pulls poleward.  Trough could catch it too.  

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36 minutes ago, calculus1 said:

That may be your biggest hope, but I'm pretty sure the people living on those islands would not see it the same way:  "Please, please, Irma, plow right over the top of us so that by our sacrifice we might decrease the amount of suffering experienced by our very dear neighbors to the north."  :D:P

This is a really good comment.  I have been thinking it would be great if the islands can help shred Irma to some degree.  I forget that this could come into the islands as a violent Cape Verde storm.  We are a wealthy nation.  Those poor people down there with limited resources would experience far more misery than we can imagine.  Hope the 12Z Euro follows the trend of keeping Irma further NE.  

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