How much wind is dangerous?

As others have mentioned, every situation is differrent. Also,err on the side of caution. I believe that the heavier the rv, the more cross wind you can withstand comfortably. As ex-semi drivers, running light or empty was our greatest fear in wind. An empty 53ft. dry van is lighter than many of our rv's and has more side surface area, making them easy to roll over. If it is a heavily loaded van, it takes a great deal of cross wind to roll it over. We (during our career) were in some pretty bad stuff, but never felt uneasy,as long as we were heavily loaded.

In summary: there is no definitive answer!