When we left Gillette, Wyoming on our way back to Midvale, Utah, there was already a heavy amount of rain coming down, worse than the day before when rain prevented us from seeing Mount Rushmore and Crazy Horse. We were driving a car from California with no snow chains, no snow tires, and no four-wheel drive on a bumpy Wyoming highway through a snowstorm that was getting worse by the minute. As bad as it seemed to us, we later found out that this was the worst late-spring snowstorm in Wyoming in 74 years!
https://www.youtube.com/watch?v=xH2RMHpIZdE