flash flood

About a week and a half ago I was working down south of Moab, Utah. While I was down there working we had a few rain storms go through and dump quite a bit of rain. Well on my way home, I was in Green River, Utah, and off to the west I could see a storm that was just dumping the rain. When I had been on highway 6 for about 5 miles, all of a sudden the semi that was in front of me a ways, came to a screeching halt. And in front of him on the highway was lots and lots of water, with lots of debris all over the road. We finally went through the water, and it was really deep, If I went over 5 mph, the water was splashing over the hood on my service truck. It was a sight to see. I had never seen anything like it before, it was really interesting.