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85mph overhang pressures

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As someone else said, pressure is a function of V^2.
So if my math is correct, the difference between 85mph and 90mph:
(90)^2-(85)^2   x 100% = 12%
Now a 12% increase in overhang uplift in my opinion affects nothing. So you end up MAYBE with a slightly larger uplift strap. Great, that is the weakest point of the structure and money well spent. Since straps are less than a buck anyway for the most part. I have seen lots of roof and structural failures that started with the uplift strap.
I would use 90mph and rock on.
Andrew Kester, P.E.
Principal/Project Manager
ADK Structural Engineering, PLLC
1510 E. Colonial Ave., Suite 301
Orlando, FL 32803