ATL: ISAAC - Models

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Re: ATL: INVEST 94L - Models

#301 Postby Hurricane Alexis » Sun Aug 19, 2012 6:01 am

Nimbus wrote:Moving west near 20 knots and both Ernesto and 7 actually sped up a little till they got past Jamaica. There is a higher probability that the fast forward speed would hinder development in the near term thus the model shifts towards weak and west solutions.

GFS and HWRF are tracking over Guadalupe again into the Caribbean. If there was a rapid intensification earlier into a deeper system the BAMD model pushes south which probably indicates they are expecting strong ridging over the southeast ConUS at that time with the systems current forward speed.

That argues against an early recurve or an immediate track up the East coast. The system could stall late in the forecast and get pulled north by a weakness somewhere though.

Still a fair probability of a landfall anywhere from Mexico to the Florida panhandle (just an opinion).


Could also end up crossing south florida from the south if it's strong enough to feel a weakness that may occur.
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Re: ATL: INVEST 94L - Models

#302 Postby cycloneye » Sun Aug 19, 2012 7:55 am

12z Models

SHIP goes bunkers!

Code: Select all

191244
CHGHUR
TROPICAL CYCLONE GUIDANCE MESSAGE
NWS NATIONAL HURRICANE CENTER MIAMI FL
1244 UTC SUN AUG 19 2012
 
DISCLAIMER...NUMERICAL MODELS ARE SUBJECT TO LARGE ERRORS.
PLEASE REFER TO NHC OFFICIAL FORECASTS FOR TROPICAL CYCLONE
AND SUBTROPICAL CYCLONE INFORMATION.
 
ATLANTIC OBJECTIVE AIDS FOR
 
DISTURBANCE INVEST (AL942012) 20120819 1200 UTC
 
        ...00 HRS...   ...12 HRS...   ...24 HRS. ..   ...36 HRS...
        120819  1200   120820  0000   120820  1200   120821  0000
 
         LAT    LON     LAT    LON     LAT    LON     LAT    LON
BAMS    14.4N  36.4W   15.5N  39.5W   16.5N  43.2W   17.5N  47.5W
BAMD    14.4N  36.4W   15.1N  39.1W   15.8N  41.8W   16.6N  44.6W
BAMM    14.4N  36.4W   15.4N  39.3W   16.3N  42.6W   17.4N  46.1W
LBAR    14.4N  36.4W   14.9N  39.4W   15.4N  42.7W   15.9N  46.1W
SHIP        25KTS          27KTS          34KTS          46KTS
DSHP        25KTS          27KTS          34KTS          46KTS
 
        ...48 HRS...   ...72 HRS...   ...96 HRS. ..   ..120 HRS...
        120821  1200   120822  1200   120823  1200   120824  1200
 
         LAT    LON     LAT    LON     LAT    LON     LAT    LON
BAMS    18.0N  52.1W   18.4N  61.3W   18.5N  70.0W   17.8N  76.4W
BAMD    17.3N  47.4W   17.6N  52.9W   17.3N  57.5W   16.2N  59.8W
BAMM    18.2N  49.9W   18.8N  58.0W   19.8N  66.2W   21.4N  72.9W
LBAR    16.5N  49.5W   17.7N  56.6W     .0N    .0W     .0N    .0W
SHIP        58KTS          84KTS         100KTS         101KTS
DSHP        58KTS          84KTS         100KTS         101KTS
 
         ...INITIAL CONDITIONS...
LATCUR =  14.4N LONCUR =  36.4W DIRCUR = 275DEG SPDCUR =  16KT
LATM12 =  14.2N LONM12 =  32.6W DIRM12 = 279DEG SPDM12 =  20KT
LATM24 =  13.2N LONM24 =  28.7W
WNDCUR =   25KT RMAXWD =   60NM WNDM12 =   30KT
CENPRS = 1011MB OUTPRS = 1014MB OUTRAD =  150NM SDEPTH =   M
RD34NE =    0NM RD34SE =    0NM RD34SW =    0NM RD34NW =   0NM
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Re: ATL: INVEST 94L - Models

#303 Postby Gustywind » Sun Aug 19, 2012 8:00 am

cycloneye wrote:12z Models

SHIP goes bunkers!

Code: Select all

191244
CHGHUR
TROPICAL CYCLONE GUIDANCE MESSAGE
NWS NATIONAL HURRICANE CENTER MIAMI FL
1244 UTC SUN AUG 19 2012
 
DISCLAIMER...NUMERICAL MODELS ARE SUBJECT TO LARGE ERRORS.
PLEASE REFER TO NHC OFFICIAL FORECASTS FOR TROPICAL CYCLONE
AND SUBTROPICAL CYCLONE INFORMATION.
 
ATLANTIC OBJECTIVE AIDS FOR
 
DISTURBANCE INVEST (AL942012) 20120819 1200 UTC
 
        ...00 HRS...   ...12 HRS...   ...24 HRS. ..   ...36 HRS...
        120819  1200   120820  0000   120820  1200   120821  0000
 
         LAT    LON     LAT    LON     LAT    LON     LAT    LON
BAMS    14.4N  36.4W   15.5N  39.5W   16.5N  43.2W   17.5N  47.5W
BAMD    14.4N  36.4W   15.1N  39.1W   15.8N  41.8W   16.6N  44.6W
BAMM    14.4N  36.4W   15.4N  39.3W   16.3N  42.6W   17.4N  46.1W
LBAR    14.4N  36.4W   14.9N  39.4W   15.4N  42.7W   15.9N  46.1W
SHIP        25KTS          27KTS          34KTS          46KTS
DSHP        25KTS          27KTS          34KTS          46KTS
 
        ...48 HRS...   ...72 HRS...   ...96 HRS. ..   ..120 HRS...
        120821  1200   120822  1200   120823  1200   120824  1200
 
         LAT    LON     LAT    LON     LAT    LON     LAT    LON
BAMS    18.0N  52.1W   18.4N  61.3W   18.5N  70.0W   17.8N  76.4W
BAMD    17.3N  47.4W   17.6N  52.9W   17.3N  57.5W   16.2N  59.8W
BAMM    18.2N  49.9W   18.8N  58.0W   19.8N  66.2W   21.4N  72.9W
LBAR    16.5N  49.5W   17.7N  56.6W     .0N    .0W     .0N    .0W
SHIP        58KTS          84KTS         100KTS         101KTS
DSHP        58KTS          84KTS         100KTS         101KTS
 
         ...INITIAL CONDITIONS...
LATCUR =  14.4N LONCUR =  36.4W DIRCUR = 275DEG SPDCUR =  16KT
LATM12 =  14.2N LONM12 =  32.6W DIRM12 = 279DEG SPDM12 =  20KT
LATM24 =  13.2N LONM24 =  28.7W
WNDCUR =   25KT RMAXWD =   60NM WNDM12 =   30KT
CENPRS = 1011MB OUTPRS = 1014MB OUTRAD =  150NM SDEPTH =   M
RD34NE =    0NM RD34SE =    0NM RD34SW =    0NM RD34NW =   0NM

Cycloneye, what do you mean by go bunker :) ? Thanks to you for the explanation, i'm a bit curious about this sentence.
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Re: ATL: INVEST 94L - Models

#304 Postby cycloneye » Sun Aug 19, 2012 8:06 am

Cycloneye, what do you mean by go bunker ? Thanks to you for the explanation, i'm a bit curious about this sentence.


Hi Gusty. It means that the model went from developing a major hurricane in the first runs,then going down developing a Tropical Storm in runs after that,and now up again developing a major hurricane in this 12z run. :)
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Re: ATL: INVEST 94L - Models

#305 Postby Gustywind » Sun Aug 19, 2012 8:25 am

cycloneye wrote:
Cycloneye, what do you mean by go bunker ? Thanks to you for the explanation, i'm a bit curious about this sentence.


Hi Gusty. It means that the model went from developing a major hurricane in the first runs,then going down developing a Tropical Storm in runs after that,and now up again developing a major hurricane in this 12z run. :)

Thanks to you, that's more clear now... :) Given what models are showing run after, looks like predicting intensity is "yoyo time" with 94L :cheesy:

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Re: ATL: INVEST 94L - Models

#306 Postby SFLcane » Sun Aug 19, 2012 9:00 am

Indeed Luis...

Image
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Re: ATL: INVEST 94L - Models

#307 Postby SFLcane » Sun Aug 19, 2012 9:06 am

Here's a look at this mornings 06z GFS ensembles..

Image
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Re: ATL: INVEST 94L - Models

#308 Postby meriland23 » Sun Aug 19, 2012 9:40 am

SFLcane wrote:Here's a look at this mornings 06z GFS ensembles..

Image


So back into agreement for the EC path vs carribean I see. Gosh when they change their minds, they sure change them pretty drastically.. such a back and forth thing here. Noticed this slowed a wee bit, few kt.
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#309 Postby meriland23 » Sun Aug 19, 2012 9:44 am

wow, 12z run is so much different, seems to take the same path (through e carribean) loses strength, then curves north to regain strength, and rides the entire EC as a significant hurricane.

http://raleighwx.americanwx.com/models/ ... SLoop.html
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Re: ATL: INVEST 94L - Models

#310 Postby Meso » Sun Aug 19, 2012 9:47 am

wow, 12z run is so much different, seems to take the same path (through e carribean) loses strength, then curves north to regain strength, and rides the entire EC as a significant hurricane.


That is yesterday's run though, the start of the 12z for today is expected in about an hour.
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#311 Postby gatorcane » Sun Aug 19, 2012 9:50 am

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GFS and ECMWF mid-level air pattern with trough over the Eastern half of North America. This would suggest unlike Ernesto and TD 7/Helene, this system may not end up in Central America. In fact at this time I am not forecasting it to impact Central America. The track would be further north.

06Z GFS 228 hours:
Image

00Z ECMWF 240 hours:
Image
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Re: ATL: INVEST 94L - Models

#312 Postby SFLcane » Sun Aug 19, 2012 9:59 am

United Kindom model from last night says it goes north of the islands. ECM was indeed the first to show little to no development with this system so it might be on to something specially with all that dry airmass just north of it. It has a rather large envelope/circulation with it so i think in time it could develope when it finds that sweet spot.

Image
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Re: ATL: INVEST 94L - Models

#313 Postby Hurricaneman » Sun Aug 19, 2012 9:59 am

The OP 6zGFS is much different than the ENS 6zGFS

The OP goes towards the Yucatan while the Ensembles are heading for the southeast US so track is pretty much still up in the air

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Re: ATL: INVEST 94L - Models

#314 Postby Hurricaneman » Sun Aug 19, 2012 11:12 am

12zGFS shows this going south of hispaniola and heads for Jamaica at 126 unlike the 6zGFS which hits all the big islands

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#315 Postby SeminoleWind » Sun Aug 19, 2012 11:17 am

12Z shows it trying get to a little stronger around Jamaica at 138 as well
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#316 Postby Riptide » Sun Aug 19, 2012 11:20 am

SeminoleWind wrote:12Z shows it trying get to a little stronger around Jamaica at 138 as well

Definitely trying to go to town south of Cuba, heading north again.
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Re: ATL: INVEST 94L - Models

#317 Postby Hurricaneman » Sun Aug 19, 2012 11:20 am

This run could be very dangerous for the gulf

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#318 Postby SeminoleWind » Sun Aug 19, 2012 11:22 am

At 162 looks like almost totally NW since 138, yikes.
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Re: ATL: INVEST 94L - Models

#319 Postby perk » Sun Aug 19, 2012 11:31 am

Anybody have a link to that new GFS run.
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Re: ATL: INVEST 94L - Models

#320 Postby SeminoleWind » Sun Aug 19, 2012 11:33 am

perk wrote:Anybody have a link to that new GFS run.


http://raleighwx.americanwx.com/models/12zgfs.html
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