We tried to outrun a mother of storms in the middle of Nebraska. by the time we made it to Omaha, two other storms converged - most lightning, rain and wind I've seen. (And looking through the window of a Class A gives a great view).
I pulled off the Interstate into a shopping center. I pulled up real close to a big store (ShopKo?) that was all closed down. Made sure there were no light poles nearby and waited out the storm. Getting close to the concrete wall of the store helped a bit and provided us with some lightening protection. Still, it was a little nerve-racking.