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Major Hurricane Irma


NJwx85

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7 minutes ago, MillvilleWx said:

 


It's a little weaker and with a storm this magnitude, it could more northerly than anything else, but it shouldn't escape. Big hit on Charleston incoming.


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Well I guess all our talk of this possibly traversing The Loop Current goes out the window on this run :P

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3 minutes ago, MillvilleWx said:

 


It's a little weaker and with a storm this magnitude, it could more northerly than anything else, but it shouldn't escape. Big hit on Charleston incoming.


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Gotta watch this, could get another ec landfall again. So back to drawing board again! 

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3 minutes ago, MillvilleWx said:

 


It's a little weaker and with a storm this magnitude, it could more northerly than anything else, but it shouldn't escape. Big hit on Charleston incoming.


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Hilton Head gets wrecked. If that pressure was to come true Charleston would have severe flooding all the way to the airbase. I think we're nearing that point where S. Fla is going to get absolutely wrecked and it's just a matter of 50 miles one way or the other. I'd like to see what they're modifying to get the GOM landfalls. 

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3 minutes ago, MillvilleWx said:

Not done yet. Fun for MA incoming. Trough not as sharp, but it's there. Winds will be elevated and right side of remnant circulation should provide an oppotunity for some spin ups


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For some east coast action, would like for this to track east of the Apps.  What would it take for that to happen and what percentage chance would you put on it (using eastern PA as a reference point- a track over eastern PA or just to its east?)

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2 minutes ago, MillvilleWx said:

Not done yet. Fun for MA incoming. Trough not as sharp, but it's there. Winds will be elevated and right side of remnant circulation should provide an opportunity for some spin ups


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Northeast and MA will def get some rain and winds according to this 

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2 minutes ago, MillvilleWx said:

 


Haven't been able to check Dvorak. You have the Raw T#? Last I heard was 7.1


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UW - CIMSS ADVANCED DVORAK TECHNIQUE ADT-Version 8.2.1 Tropical Cyclone Intensity Algorithm ----- Current Analysis ----- Date : 05 SEP 2017 Time : 091500 UTC Lat : 16:39:15 N Lon : 57:12:27 W CI# /Pressure/ Vmax 7.0 / 925.2mb/140.0kt Final T# Adj T# Raw T# 7.0 6.9 6.9

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With all the shifts west on the guidance, you have to think that a shift east will happen again.  Similar to winter storms when the models go all out and then rebound a little.

Now that we have better sampling of the trough, the models are probably able to get a better idea of the output.  I think the trough will influence it a little more than thought.  That's a strong air mass and front moving through.

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1 hour ago, timnc910 said:

So with all the 0z models going way west of previous runs.. I'm taking it that the east cost is fairly safe from any impacts from Irma? If trends are the thing to watch you can't deny the trends that happened all day yesterday. . Can the models go back to showing it's going east of Florida and making lf on east coast this very unlikely at this point.. all focused goes to Florida and the gulf coast.. the east coast will be spared from this storm..

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This should answer you question:

gfs_mslp_wind_watl_27.png

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For some east coast action, would like for this to track east of the Apps.  What would it take for that to happen and what percentage chance would you put on it (using eastern PA as a reference point- a track over eastern PA or just to its east?)



East coast action needs to at least ride the Apps. You want a sharper trough for phasing interaction and jet couplet to develop at 250-300mb. That would provide better lift due to divergent flow on the right entrance region of the jet streak over the NE and left exit coming in from Lakes. Chances of remnant circulation overhead need a bit more easterly presence once it makes turn and interacts with Lower Miss Valley shortwave. Can ride up coast a bit offshore and would want to hit somewhere around Wilmington NC to get over Central VA longitude.


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5 minutes ago, MillvilleWx said:

 


East coast action needs to at least ride the Apps. You want a sharper trough for phasing interaction and jet couplet to develop at 250-300mb. That would provide better lift due to divergent flow on the right entrance region of the jet streak over the NE and left exit coming in from Lakes. Chances of remnant circulation overhead need a bit more easterly presence once it makes turn and interacts with Lower Miss Valley shortwave. Can ride up coast a bit offshore and would want to hit somewhere around Wilmington NC to get over Central VA longitude.


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Definitely- I use Wilmington, NC as my reference point too.  It seems that TC that make landfall near there end up near the Jersey Coast or Western Long Island, while TC that make landfall near Cape Hatteras end up near the east end of LI or SE NE.  Going the other way, if it makes landfall near Myrtle Beach or Charleston, for whatever reason those storms seem to go west of the Apps.  Do you believe the mountains can influence the track of a TC?  I'd assume that a track right over the spine is least likely and the TC (like what happens with coastal systems) gets pushed either west of the Apps or east of them.

 

A sharper trough would also aid in enhancing the outflow so it would help the storm maintain some of its intensity (or at least not lose it as quickly as it would otherwise) on its trip north.

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1 hour ago, timnc910 said:

So with all the 0z models going way west of previous runs.. I'm taking it that the east cost is fairly safe from any impacts from Irma? If trends are the thing to watch you can't deny the trends that happened all day yesterday. . Can the models go back to showing it's going east of Florida and making lf on east coast this very unlikely at this point.. all focused goes to Florida and the gulf coast.. the east coast will be spared from this storm..

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Nothing is off the table yet.

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1 minute ago, jbenedet said:

Big shift east on that versus 0z guidance. Really need to watch that trough over the northeast--subtle changes have huge implications, even for southern Florida.

The 0z UKMET shifted north also from 12z yesterday and it's usually the furthest south with tracks.

0z

0_es4.png.8d4a1b4a9fc8ba73296a87afa6090b4d.png

12z

12_es4.png.257e1e19d13d78a720337d5de9906450.png

 

 

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