I figured it must be a levee breech somewhere, and I saw that mentioned in news articles, but with no real specifics. It wasn't until I saw today's ( Sunday's ) MODIS AQUA image of the lower Mississippi that I was able to locate it:
See it? Lake Providence is the brown "pond" at center bottom. ( This is my hand processed version of the "raw" image. )
Compare and contrast the much ballyhooed Bonnet Carre and Morganza spillway openings:
Well, you can see the efflux of the Bonnet Carre spillway, but the is nothing in the Morganza floodway after two days! After all, they only opened a couple of gates. I suppose there is water pooled by the spillway, but the "pond" you see in the circle is largely on the riverside, where it's supposed to flow through the spillway when it's opened. My thought: The Morganza opening was "pro forma". Evidently the breech of the abandoned thousand year old ;-) levee south of Greenville was much more efficacious.
The secretary will ignore all of my pronouncements, should you choose to accept them.