The 7am tide I reported was for the Grand Isle area (though I has two sources - differing by about 45 mins.). Either way, it ain't low tide, for sure. And in this case, it might as well be a tsunami.
I picked up the data for Southwest Pass - it's actually at 4:41 AM there. I'm not familiar with the coastal geography of the delta, so I don't know exactly where these locations are at.