Let me know what you figure out. I'm in Houston as well. I have a similar noise. Maybe a joint strike?
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2004 Boxster S Anniversary Edition #1540 - My daily driver
2012 Mini Countryman S - Her daily driver
1966 Ford Mustang - Son's daily driver in 2026
They couldn't find a thing. All looks good up there. So, don't worry, be happy, and leave the top down!
You will not find this issue with a visual inspection... Here is where the noise was coming from when I had the same problem (see attached picture), you will need to replace the the control arm links.