It's not going to take a lot of wind.
Of course to figure out exactly would take Math or repetitive testing. Plus if you put a bike cover on it it's going to act as a sail and catch the wind.
I would park near a building or bigger object to block the wind.
I used to park mine in my apartment, but I was lucky enough to live on first floor with a sliding glass door.
If you have the option to park it in a dedicated spot, try putting tie down stakes in the ground and strap the bike down.
If that's not an option, try mounting a wheel chock to a long board or pipe and strapping the Max to that.
And if all that is not an option then the center stand would be your best bet as long as it's on concrete or pavement.
Another option (which I don't recommend because I've done it and is Not reversible) Is to grind some of the stop off the kickstand. This will let the kickstand move forward a bit and let the bike lean more while sitting on the kickstand. But more lean means more weight on the kickstand. Which means more often it will get pressed through hot pavement and soft ground. So carry a kickstand pad with you at all times.
