TD 6 in the SAL

[Derek Ortt]

Development is really looking unlikely as this is embeded within the SAL. Probably not much development until this breaks free, which may not occur until this is in the GOM

[OtherHD]

You're probably right derek...I think at the most this will stay a TD/weak TS until the GOM. I wouldn't rule out short bursts like the one tonight and what we saw with Claudette, but nothing to really increase its intensity. It's bone dry up to the NW Caribbean.

[*StOrmsPr*]

why do you think the nhc havent made any mention about SAL on the 06 disc.??

[Derek Ortt]

Because it is too new of a factor and somewhat experimental (research is being conducted, and I won't give much away about that research). They didn't even mention it in Joyce, even after the G-IV aircraft dropsondes obviously indicated that the cause of the weakening was the SAL

[DROliver]

Because it is too new of a factor and somewhat experimental (research is being conducted, and I won't give much away about that research). They didn't even mention it in Joyce, even after the G-IV aircraft dropsondes obviously indicated that the cause of the weakening was the SAL

Hey Derek,

Who is doing this research?
Please provide a link that details the project.Also if you could provide us with an outline of this experiment.I would like to learn more.

Peace

[Derek Ortt]

For the most part, this is an HRD project, though I, at UM, am also looking into selected storms by analyzing G-IV dropsondes. However, most of this is an HRD project

[mf_dolphin]

Derek could you explain what the SAL is? I think it would be good for our member to at least know what the term means. Thanks

[DROliver]

Thanks for the quick response.

Will you provide access to the ongoing data?

Peace

[Derek Ortt]

SAL is Saharan Air Layer

As for access to real time data. This is not possible to provide the actual data. I generally do not disclose much in the way of any research data. However, there is a loop available that tracks the SAL from the University of Wisconson http://www.ssec.wisc.edu/tropic/real-ti ... l-atl.html

[LEWP]

Because it is too new of a factor and somewhat experimental (research is being conducted, and I won't give much away about that research). They didn't even mention it in Joyce, even after the G-IV aircraft dropsondes obviously indicated that the cause of the weakening was the SAL

It's mentioned in the TPC Joyce report from three years ago:

http://www.nhc.noaa.gov/2000joyce.html

Data from NOAA aircraft GPS dropsondes on the 30th and satellite imagery suggest that a mechanism responsible for the above weakening was the entrainment of lower-tropospheric dry Saharan air into Joyce's circulation.

I don't recall if the discussions mentioned it at the time; they of course don't mention absolutely everything in the discussions or they'd be 20 pages long.

I remember the CIMISS SAL products being public, for, I think 3 years and possibly more (I see they finally fixed them, had problems switching to GOES-12 earlier in the year.)

I don't see SAL as some sort of brand-new atomic secret.

[Steve Cosby]

That's absolutely fascinating.

So, the idea is that this layer of Sahara origin air (presumably the dry slot that shows on the WV loops?) ends up inhibiting TS development? And this air is found at some level in the atmosphere when it is present? The images seem to show a near blow torch coming off the African continent.

Thanks for posting this!

[Steve Cosby]

I posed the question to Bastardi and got this answer (typos and all!)

yes and no,. If tis to the north and leading it the wave is negatively tilted and no, if near or south, yest

JB is not the best typist in the world...

[wx247]

What a great answer from him. Maybe some day he will go to typing school. I wonder if anyone proofreads his columns.

[Steve Cosby]

You notice he always says when he finishes the write-up on something that is out for "editing". No kidding!

[southerngale]

I guess we all have our weaknesses.....

[Johnny]

I've gotten the same type of e-mails from JoeB. Lots of mis-spelled words and they are simple words. Either he is jetting through e-mails too quickly or he's got a spelling problem. If he's got a spelling problem then he's got a professional typing up his columns for him. No big deal just a little food for thought.

[Derek Ortt]

The SAL loops have been available. I was referring to the vertical profiles from the G-IV dropsondes and the actual SSMi data (not the NRL images). The ones I generate at UM, along with the actual data is not available

[DROliver]

The SAL loops have been available. I was referring to the vertical profiles from the G-IV dropsondes and the actual SSMi data (not the NRL images). The ones I generate at UM, along with the actual data is not available

Is the data from the G-IV dropsondes and SSMi data available to the public?(from NOAA) If you could please provide a link.

Peace

[Derek Ortt]

The actual data is not exactly available as special programs are needed to view the data (gunzipped and fortran required). Plus, the data will end up boggin down your PC as each SSMI pass (not from NOAA) is about 80MB


However, the pass images are available from NRL

[DROliver]

The actual data is not exactly available as special programs are needed to view the data (gunzipped and fortran required). Plus, the data will end up boggin down your PC as each SSMI pass (not from NOAA) is about 80MB


However, the pass images are available from NRL

I own 100 servers plus I use the college's computer systems We crunch tons of stats everyday and I have those programs.My PC can handle 80MB It is a Intel Dual Xenon 1 gig of Ram and 3 120 gig HD! :o

So it would not be a problem to run that data.But it might consume to much of my time!

When will you make your data available?It sounds intriguing.

Peace