Just a heads up, the only guaranteed delivery timeline for USPS is their priority mail express service.
Everything else is just an estimate. First class, ground advantage, priority, and it essentially gets there when it gets there.
Looks like the package was in a large pickup and USPS is in possession, but it hasn't been scanned into the mailstream as of yet. Should've been scanned at the local office or at their local processing plant.
Stuff going through Houston, Atlanta and the other large distro centers either tend to A- move through quickly with no issue, or B- enter some kinda black hole and randomly pop up in the mailstream.