Last year we were headed to Yellowstone from MN. By the time we got to western S.Dakota there were storms rolling in. We stopped to do a little sightseeing at dusk and took a look at radar on our smartphones. There were 2 huge storm systems on either side of the interstate just west of us with a narrow band of showers connecting them. We jumped back in the van and took off. We hit a little rain and some wind but nothing bad. A few days later, while in Yellowstone we met a couple whose tt was beaten up by hail (dents, broken skylight, etc.). They had gone thru the area in SD an hour or two behind us and stopped for the night. They got clobbered by the storm we just missed. A week later on our return trip, we stopped in SD for a few days and many places were still cleaning up branches, etc. from the storm. Sometimes its good to be just plain lucky.