It depends on relative wind direction, gustiness, how fast you are going, TT side area, CG and loading, the amount of control in your hitch setup, weight and stiffness of your tow vehicle.
Moving trailers don't just blow over from wind pressure when moving, like they might standing still. The get started tipping, also swaying, from wind pressure, tipping relieves the pressure, they bounce back, repeat and oscillations start building, pretty quickly beyond your ability to do something about it.
If the hitch connection is strong enough, it might take the tow vehicle over too, but more often you simply lose control before that happens and have a roll over accident from leaving the road sideways or spinning.
I have family whose 26 foot lightweight TT was blown over in 35-40 mph winds, caught suddenly leaving a sheltered area of highway for an open one. You don't need 100 mph.