90L.INVEST in the South Atlantic

#1 Postby **P.K.** » Fri Dec 31, 2004 4:07 pm

Should really be 90T.Invest though shouldn't it?

Matt-hurricanewatcher · #2 Postby **Matt-hurricanewatcher** » Fri Dec 31, 2004 4:16 pm

Holy $#$%

#3 Postby **P.K.** » Fri Dec 31, 2004 4:32 pm

Sea temperatures are not really high enough though as you would expect. I was quite surprised when I saw it as well. I can't even find any wind shear charts for the South Atlantic. :lol:

James · #4 Postby **James** » Fri Dec 31, 2004 4:51 pm

It's also in a similar place to the tropical cyclone that was there earlier in the year!

Matt-hurricanewatcher · #5 Postby **Matt-hurricanewatcher** » Fri Dec 31, 2004 5:15 pm

Looking at the satellite is appears that this system was a short lived tropical storm this morning. Then strong wind shear pushed all the convection to the northeast.

#6 Postby **Hurricanehink** » Fri Dec 31, 2004 5:42 pm

Does anyone have a pic from this morning?
BTW, wow! Could this be the start of a new Tropical Basin? Even though it isn't very organized, it shows that the South Atlantic has potential for storms. I agree it should be 90T, as 93L was used for Otto. Just to reduce confusion.

#7 Postby **P.K.** » Fri Dec 31, 2004 5:57 pm

http://www.sat.dundee.ac.uk/pdus/EI/200412312100EI1_g.jpg - Just change the time in the address. It updates every three hours.
http://www.sat.dundee.ac.uk/pdus/EV/200412311800EV1_g.jpg - Same as with the IR images.

I'm not sure if you have to be registered to view these images. (You do for the UK images)

Anonymous · #8 Postby **Anonymous** » Fri Dec 31, 2004 7:06 pm

Some images from earlier...

http://www.independentwx.com/images/90L/

https://www.youtube.com/user/senorpepr · #9 Postby **senorpepr** » Fri Dec 31, 2004 7:11 pm

P.K. wrote:Should really be 90T.Invest though shouldn't it?

Well, the USN uses the L-suffix for all Atlantic system, regardless of hemisphere. The UKMO, on the other hand, uses the T-suffix for South Atlantic systems.

The best guidance I have refers to using the T-suffix in this case.

#10 Postby **P.K.** » Fri Dec 31, 2004 7:22 pm

Ok, thanks. 8-)

I'll go with what the Met Office say as I don't want Daniel Corbett chasing me. :lol:

(I'm not expecting many of you to understand what I'm talking about here :lol:

)

https://www.youtube.com/user/senorpepr · #11 Postby **senorpepr** » Fri Dec 31, 2004 7:26 pm

P.K. wrote:Ok, thanks.

I'll go with what the Met Office say as I don't want Daniel Corbett chasing me.

Actually, if I'm not mistaken, it was the UKMO that first used the T-suffix for South Atlantic systems. They also used the M-suffix for Mediterranean systems.

#12 Postby **P.K.** » Fri Dec 31, 2004 7:33 pm

Good to see we are always ahead of everyone else.. :lol:

Is there any reason why tropical cyclones could form in this area at lower temperatures than in the main basins? I've been trying to think of reasons why this could be the case.

https://www.youtube.com/user/senorpepr · #13 Postby **senorpepr** » Fri Dec 31, 2004 7:37 pm

P.K. wrote:Good to see we are always ahead of everyone else..

Is there any reason why tropical cyclones could form in this area at lower temperatures than in the main basins? I've been trying to think of reasons why this could be the case.

I'm without a clue. I do, however, notice that NRL has removed the system from their pages. Only 06S and 07S are listed.

#14 Postby **P.K.** » Fri Dec 31, 2004 7:42 pm

I wrote down a few ideas and came up with these. (Remember they are only ideas :lol:

)

Maybe temperatures can be lower if they are warm enough to a deeper depth?

Another thing I can think of it maybe there is some sort of change going on with the thermohaline conveyor belt in that area leading to warmer seas?

Some sort of El Nino effect induced by man?

Maybe something to do my third year project on next year.......

https://www.youtube.com/user/senorpepr · #15 Postby **senorpepr** » Fri Dec 31, 2004 8:51 pm

Oops...

looks like NRL is having some problems with their website. According to FNMOC, 90T (or 90L), 06S (which is finaled), 07S, and 96S are active.

Invest 90T
29.6S 47.1W (245mi ENE of Porto Alegre, Brazil)
25 mph
1009 mb

Matt-hurricanewatcher · #16 Postby **Matt-hurricanewatcher** » Fri Dec 31, 2004 9:03 pm

This morning the system had deep convection over its LLC. With banding forming. Must be that freaking wind shear. But this doe's count as another rare storm.

#17 Postby **senorpepr** » Fri Dec 31, 2004 10:25 pm

The "word on the street" is that NRL is having a little problem listing storms because it's looking for data for 2004, but since UTC is now in 2005...

I'm sure once the computer guys at Monterey wake up from their vacation it'll get fixed. Meanwhile, FNMOC ( http://tcweb.fnmoc.navy.mil/tc-bin/tc_home.cgi ) has the hook-up.

Matt-hurricanewatcher · #18 Postby **Matt-hurricanewatcher** » Fri Dec 31, 2004 11:07 pm

http://www.sat.dundee.ac.uk/pdus/AI/200 ... 0AI1_g.jpg

Earlier the system had deep convection in a clearly defined LLC on quickscats. This was a depression. Very weird things are going on. :eek:

https://www.youtube.com/user/senorpepr · #19 Postby **senorpepr** » Fri Dec 31, 2004 11:20 pm

Matt-hurricanewatcher wrote:http://www.sat.dundee.ac.uk/pdus/AI/200412311200AI1_g.jpg

Earlier the system had deep convection in a clearly defined LLC on quickscats. This was a depression. Very weird things are going on.

It may be possible, although I think it wasn't quite depression status.

KWT · #20 Postby **KWT** » Sat Jan 01, 2005 2:01 pm

I'm starting to think that maybe these sorts of systems will become more common,it was only last year that we got another such system,apprently a first for a while,then we get 2 in 15 odd months.

90L.INVEST in the South Atlantic

90L.INVEST in the South Atlantic

Re: 90L.INVEST in the South Atlantic

Who is online