Images to follow the SAL

[Derek Ortt]

I did this last year and was a bit late to start this year, but I again have SSMi SAL imagery available on nwhhc.

http://www.nwhhc.com/salimages/

This year, I have included both of the day's passes on the same page, making it a bit more user friendly

[Dave C]

[Derek Ortt]

?????

[Aquawind]

total precipitable water content = SAL ? or in general terms? Please clarify..Thanks

[USAwx1]

total precipitable water content = SAL ? or in general terms? Please clarify..Thanks

Areas where the SAL is especially strong are very dry. Therefore PW will be lower.

[Derek Ortt]

The blue areas represent the dry regions; thus, the SAL areas

[Aquawind]

total precipitable water content = SAL ? or in general terms? Please clarify..Thanks

Areas where the SAL is especially strong are very dry. Therefore PW will be lower.

Well of course..SAL itself is more specific than dry air though..I mean dry air alone does not mean SAL or does it?

[Aquawind]

The blue areas represent the dry regions; thus, the SAL areas

I am not stupid.

[Derek Ortt]

no, but checl out wher eit is coming from. That makes it easy to detect

[USAwx1]

total precipitable water content = SAL ? or in general terms? Please clarify..Thanks

Areas where the SAL is especially strong are very dry. Therefore PW will be lower.

Well of course..SAL itself is more specific than dry air though..I mean dry air alone does not mean SAL or does it?

No not always. SAL is also associated with a significant temperature inversion.

[Aquawind]

Unless SAL is in all dry air?

[Matthew5]

Remember The SAL comes from the Deserts of Africa(Sand that floats in the Atmosphere) This moves out into the Atlatnic oceans in kills off the storms. Dry air doe's not have sand or anything to do with it but it's just dry.

[Aquawind]

Were getting closer..The Graphic is more in general terms of SAL possibly located in these Drier(Blue) areas and more likely the closer to the African Coast..

[USAwx1]

heres a rundown on SAL that i posted earlier this year.

---

The term SAL was first coined by Atmospheric Chemist Joe prospero, and an associate of his, Toby Carlson of PSU.

SAL forms in a very dry and well-mixed environment over the Sahel region of Africa that propagates westward and eventually is undercut by an area of cool and more moist air (since cooler air is more dense it sinks) after coming off the coast. The airmass is VERY DRY and consists of Mineral dust lifted from the Surface of the desert.

Why and How does SAL effect tropical systems? The answer is b/c SAL is associated with significant increases in VERTICAL shear in response to the development of a stronger easterly jet, temperature inversion (w/ a pronounced warm layer above the cooler air) and of course DRY AIR.

All of these things can inhibit TC development.

[Aquawind]

total precipitable water content = SAL ? or in general terms? Please clarify..Thanks

so...total precipitable water content ~SAL...but certainly not SAL itself..just in genreal terms...geesh that was hard..LOL

Geesh I even had SAL explained to me..lol

What other graphics are used for SAL interpretation Derek or anyone else?

[Aquawind]

Thanks USA..I read all your posts..

[USAwx1]

http://www.storm2k.org/weather/sal.html

[USAwx1]

Thanks USA..I read all your posts..

No problem. Check out the link in my last post for more sal maps/

[Aquawind]

Says Analysis..
GOES-12 10.7 µm (Ch. 4) and 12 µm (Ch. 5) IR channels


Is this superimposed model data or combined sattelite channels?
Is this Sattelite interpretation alone or is there other data input into the Analysis?

[USAwx1]

Here's some info on it from CIMSS.

http://cimss.ssec.wisc.edu/tropic/real- ... ginfo.html