Domain: tiger-web1.srvr.media3.us Hurricane Irma - Spinning Down | Page 34 | O-T Lounge
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re: Hurricane Irma - Spinning Down

Posted on 9/2/17 at 4:24 am to
Posted by GEAUXmedic
Premium Member
Member since Nov 2011
42051 posts
Posted on 9/2/17 at 4:24 am to
Remember how 2 days ago when it was aimed to the Gulf everyone was saying the models are too far out to be accurate and to wait til we're closer.

It's the same thing now that the models say we are in the clear. Just cause it gives us a favorable outcome doesn't mean it's more accurate. That is the definition of wishcasting.

We just have to be patient.
Posted by cajunangelle
Member since Oct 2012
164057 posts
Posted on 9/2/17 at 6:53 am to
quote:

LINK ]Why the Hurricane Irma Forecast for the U.S. Is Still Uncertain and Difficult | The Weather Channel



The example below features, in gray, the ensemble forecast tracks from the European Centre for Medium-Range Weather Forecasts, conducted Aug. 31 at 8 p.m. EDT. You can hardly see the U.S. map below the mess of possible tracks, extending from south of Newfoundland to the Gulf of Mexico.

The second part of the animation shows another set of ensemble forecast tracks – this time in blue – from NOAA.




So, how's your forecast confidence now? Mine, frankly, is very low. There are surely a number of ominous tracks, but many also curl Irma out to sea away from the East Coast.

This kind of uncertainty is very common with hurricanes thousands of miles and more than a week away from the U.S.

Professional meteorologists don't analyze one particular run of one model, but look at an entire suite of current data – such as those from satellites as well as ensemble models – learn each model's biases and, importantly, look for trends in those models over time to help diagnose the danger of any hurricane to the East Coast.

All we can say right now is that the U.S. East Coast and Gulf Coast all need to monitor the progress of Irma.

This post was edited on 9/2/17 at 6:56 am
Posted by X123F45
Member since Apr 2015
29669 posts
Posted on 9/2/17 at 7:17 am to
quote:

There's a U2 concert in NOLA on the 14th, too. shite.




Great. Now God has to send it to Louisiana.
Posted by RebelOP
Misty Mountain Top
Member since Jun 2013
12499 posts
Posted on 9/2/17 at 7:19 am to






Posted by deltaland
Member since Mar 2011
101482 posts
Posted on 9/2/17 at 7:51 am to
quote:

Yea it's still a while away but that jump north into a strong ridge is odd We will see what the next few runs show


Yea I would have thought if it misses the trough it would go into the gulf
Posted by East Coast Band
Member since Nov 2010
66950 posts
Posted on 9/2/17 at 8:34 am to
What's that lowest pressure estimate in the center?
Posted by rds dc
Member since Jun 2008
21263 posts
Posted on 9/2/17 at 8:55 am to
Irma is making the turn to the SW. How far SW does it go?

Posted by Hulkklogan
Baton Rouge, LA
Member since Oct 2010
43482 posts
Posted on 9/2/17 at 9:05 am to
Getting closer to that annular status, too...
Posted by rt3
now in the piney woods of Pineville
Member since Apr 2011
146915 posts
Posted on 9/2/17 at 9:16 am to
the 06z GFS this AM... essentially the same landfall spot as the 00z GFS

This post was edited on 9/2/17 at 9:19 am
Posted by rds dc
Member since Jun 2008
21263 posts
Posted on 9/2/17 at 9:20 am to
quote:

Getting closer to that annular status, too...


The current Annular Hurricane Index is 0 with 100 being best fit annular.
Posted by Hulkklogan
Baton Rouge, LA
Member since Oct 2010
43482 posts
Posted on 9/2/17 at 9:23 am to


ok i'll shut up.
This post was edited on 9/2/17 at 9:29 am
Posted by slackster
Houston
Member since Mar 2009
91502 posts
Posted on 9/2/17 at 9:25 am to
quote:

ok i'll shut up.
Posted by East Coast Band
Member since Nov 2010
66950 posts
Posted on 9/2/17 at 9:29 am to
quote:

Getting closer to that annular status, too...


The current Annular Hurricane Index is 0 with 100 being best fit annular.


0 is only 100 away from 100.
Posted by rds dc
Member since Jun 2008
21263 posts
Posted on 9/2/17 at 9:30 am to
quote:

0 is only 100 away from 100.


You got to start somewhere!
Posted by Hulkklogan
Baton Rouge, LA
Member since Oct 2010
43482 posts
Posted on 9/2/17 at 9:31 am to
I literally couldn't be more wrong
Posted by slackster
Houston
Member since Mar 2009
91502 posts
Posted on 9/2/17 at 9:35 am to
I'm not sure where you can find the current index rating, but this is something I found while looking for it:



Values greater than 0 indicate an annular hurricane, so basically only the top right.
Posted by rds dc
Member since Jun 2008
21263 posts
Posted on 9/2/17 at 9:38 am to
quote:

I'm not sure where you can find the current index rating, but this is something I found while looking for it:


## ANNULAR HURRICANE INDEX (AHI) AL112017 IRMA 09/02/17 12 UTC ##
## STORM NOT ANNULAR, SCREENING STEP FAILED, NPASS=5 NFAIL=2 ##
## AHI= 0 (AHI OF 100 IS BEST FIT TO ANN. STRUC., 1 IS MARGINAL, 0 IS NOT ANNULAR) ##

ETA: It's in the SHIPS text file LINK
This post was edited on 9/2/17 at 9:43 am
Posted by slackster
Houston
Member since Mar 2009
91502 posts
Posted on 9/2/17 at 9:54 am to
Thanks.
Posted by rds dc
Member since Jun 2008
21263 posts
Posted on 9/2/17 at 9:57 am to
12z early tracks, 15N,55W is kind of the benchmark that I'm watching for the SW dive that would start to raise some concerns, nothing really close.

Posted by JimMorrison
The Peninsula
Member since May 2012
20747 posts
Posted on 9/2/17 at 10:04 am to
When is Irma supposed to hit Cat 4 status?
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