Interesting system over the South Atlantic

Ptarmigan · #21 Postby **Ptarmigan** » Fri Feb 29, 2008 10:54 pm

Interesting to watch for sure. I remember Hurricane Catarina hitting Brazil in April of 2004. Hurricanes likely have formed inthe South Atlantic prior to satellites.

South Atlantic is one of the areas that do not see any tropical cyclone development because of lack of intertropical convergence zone, strong wind sheer from large extratropical low pressure systems that surround Antartica and make the Southern Ocean one of the stormiest places on Earth, and cooler waters. Same reason applies to why the Southeast Pacific off the coast of South America is devoid of tropical cyclones, which has the Humboldt Current and a semi-permanent high pressure system. It explains why Atacama Desert is the driest in the world.

MetSul Weather Center · #22 Postby **MetSul Weather Center** » Sat Mar 01, 2008 1:50 pm

#23 Postby **HURAKAN** » Sat Mar 01, 2008 2:38 pm

Looks interesting but seems to have no interest in acquiring tropical characteristics.

#24 Postby **HURAKAN** » Sat Mar 01, 2008 2:43 pm

Pretty large ET system.

MetSul Weather Center · #25 Postby **MetSul Weather Center** » Sat Mar 01, 2008 2:52 pm

Hi Hurakan !!!

The interesting point regarding this system is the warm core in the lower levels, so it is not purely ET. See the HPC/NOAA discussion on this cyclone in the page 1 of this topic.

Alexandre

#26 Postby **HURAKAN** » Sat Mar 01, 2008 3:03 pm

That sounds weird but interesting. A system so large and partially tropical. Weird!!!

Cyclone1 · #27 Postby **Cyclone1** » Sat Mar 01, 2008 3:32 pm

I'm not a geometry expert, but isn't this an
"Interesting system over the west South Atlantic" ?

:wink:

#28 Postby **HURAKAN** » Sat Mar 01, 2008 3:44 pm

Cyclone1 wrote:I'm not a geometry expert, but isn't this an
"Interesting system over the west South Atlantic" ?

This thread was for the system near Africa in the South Atlantic and that's why it was refered as the "eastern South Atlantic."

MetSul Weather Center · #29 Postby **MetSul Weather Center** » Sat Mar 01, 2008 4:08 pm

HURAKAN wrote::uarrow: That sounds weird but interesting. A system so large and partially tropical. Weird!!!

In fact, weird !!!

We have no recollection of a subtropical system developing over the continent, but the structure of this system resembles a subtropical one. It has a warm core in the lower levels and cold core in the upper levels. Here is the current phase diagram from the GFS:

http://moe.met.fsu.edu/cyclonephase/gfs ... 00/12.html

#30 Postby **HURAKAN** » Sat Mar 01, 2008 6:35 pm

Could the diagram be getting this wrong?

Chacor · #31 Postby **Chacor** » Sat Mar 01, 2008 10:06 pm

Cyclonephase diagrams are based off models, so it's possible.

#32 Postby **HURAKAN** » Sun Mar 02, 2008 2:14 pm

Chacor · #33 Postby **Chacor** » Sun Mar 02, 2008 10:07 pm

Interesting new system east-northeast of this old one.

#34 Postby **HURAKAN** » Sun Mar 02, 2008 10:48 pm

Okay. This is when you know that there is not much in the tropics!!!

Interesting system over the South Atlantic

Re: Interesting system over eastern South Atlantic

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