Latitude of the ITCZ and SAL

[SouthFloridawx]

Check out the big burst of SAL into the Atlantic. Also the ITCZ is much farther south than normal.

[TYNI]

What affect does the ITCZ being further south typically have? Most of the time, when I read about new tropical waves, I hear that the convection is partially embedded within the ITCZ. Also, is the monsoon trough usually aligned with the ITCZ from the African coast and westward? Does this impact more than late season potential CV storms?

The SAL provides a hostile environment to development, as I understand.

Just trying to learn a little.

[cycloneye]

Without a doubt,is the largest sal outbreak so far in 2011. Normally,June and July are the prime months to have those outbreaks.



About why the ITCZ is almost at the equator on late June is a good question for any of our pro mets to explain this.

[SouthFloridawx]

[stormreader]

What affect does the ITCZ being further south typically have? Most of the time, when I read about new tropical waves, I hear that the convection is partially embedded within the ITCZ. Also, is the monsoon trough usually aligned with the ITCZ from the African coast and westward? Does this impact more than late season potential CV storms?

The SAL provides a hostile environment to development, as I understand.

Just trying to learn a little.

ITCZ being further south has a negative impact on development of storms (from what I can tell). Its impossible for a system to spin up at the equator itself. So its usually later in the season, as the ITCZ migrates north some, that the coriolis force from the earth's spinning allows for a counterclockwise spin up of tropical cyclones.

[tolakram]

It doesn't look like the NHC archives the surface analysis graphic but they do archive the discussions.

http://www.nhc.noaa.gov/archive/text/TWDAT/

805 AM EDT THU JUN 25 2009
...THE ITCZ...

FROM AFRICA NEAR 9N13W TO 7N30W 5N40W 7N54W. STRONG SHOWERS AND
THUNDERSTORMS ARE IN THE OCEAN FROM 6N TO 10N BETWEEN 13W AND
20W...AND FROM 7N TO 8N BETWEEN 49W AND 50W. SCATTERED MODERATE
TO STRONG SHOWERS AND THUNDERSTORMS ARE FROM 4N TO 8N BETWEEN
32W AND 40W. ...

805 AM EDT FRI JUN 25 2010
...ITCZ...

ITCZ AXIS IS CENTERED ALONG 12N15W 10N22W 4N46W 7N56W 10N62W.
CLUSTERS OF SCATTERED MODERATE CONVECTION ARE FROM 5N-12N E OF
23W TO INLAND OVER W AFRICA AND FROM 1N-6N BETWEEN 40W-47W.



805 AM EDT SAT JUN 25 2011
...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA FROM THE PRIME MERIDIAN
AT 22N ALONG 19N10W TO 20N16W. IT PICKS UP W OF A TROPICAL WAVE
CONTINUING ALONG 7N30W TO 5N34W. THE ITCZ AXIS CONTINUES FROM
5N34W ALONG 4N45W 3N57W. SCATTERED MODERATE/STRONG CONVECTION
WITHIN 90 NM S OF THE AXIS BETWEEN 30W-37W...AND WITHIN 90 NM
N...45 NM S OF THE AXIS BETWEEN 42W-47W. ...


It has a funny bend south near SA (57W is more south than usual) but overall I don't think it's abnormally south.

[BigB0882]

Isn't the SAL normal for this time of year? The ITCZ is quite far south but this is the time of year we usually have Caribbean and Gulf storms pop up, so I am guessing the ITCZ would not be much of a hindrance any more than it normally is. If it were that far south in late Aug then I would begin to think it was possibly going to affect storm totals and keep us in a possibly quiet season.

[SouthFloridawx]