Wind...one of my favourite subjects. Since losing a 5er to a blowover on I80 west of Laramie a few years ago I have alot of respect for wind.
On breezy days we pay attention to tree branches moving, grass moving, the direction of flags flying, ripples on ponds, anything that gives an indication of direction & velocity of wind.
We are also concious of weight & where it is in the trailer. The side that the fridge is on is much heavier so we load other stuff as much as possible to compensate.
One thing we load up on if we know we will have a windy travel day is water. We can carry 100gal so over 800# down low between the wheels is a good thing. The extra fuel burned is cheap compared to the consequences of a blowover.
If there is the slightest doubt about safety we stay put for the day, or get off the road if we get caught out. Seeing big rigs wobble is a good reason to get off the road.