Stay safe trooper and tell the wife to head North now.... Not west, don't wait. You know as well as anyone that hesitation can kill you. We may be chewing the same turf really soon. We already have shower trailers being dispatched to the area.
If you wait for the wind to pick up it's going to be too late and she may not be able to pull the trailer. She ain't going to out run the wind once it gets there.
At 25 mph steady winds we are required to shut down per our company guidelines. IIRC At 35 mph high profile vehicles are not supposed to be on the highway per federal law.
If she's driving in a cross wind, a micro burst will flip these trailers in a heart beat. Several transport companies lost both truck and trailers like that this year including our own. Our driver really did a number and did a complete 360* rollover off a bridge in Ontario with a fifth wheel trailer completely totaling the truck and trailer. You could not even tell what they were it was such a mangled mess.
I can tell you for a fact these trailers are a handfull in the wind and when you combine highway speed with a 25 mph cross wind or quartering wing parts like the lower skirts, TV antennaes and awnings bend, break and tear. Now add a little rain to the equation.......Have you ever seen followed somebody trying to drive/pull an RV in a 50 mph wind without the sense to stop. I have and they like to be sideways and lift tires off the ground. I generally won't even drive without a trailer in wind like that.
Stay safe, Godspeed.
