Just another T-storm?

This morning when I drove to work around 7 a.m. the sun was shining. After a few miles I noticed a thunder flash, a few minutes later it started to become dark and very windy. It became even darker then on a regular night and it started raining like I never saw before, the sight was very bad and big hail stones where falling down. The Highway was one big pool. At one spot I was even worried that the water would flow inside the car. A few miles later the sun was back and it seemed like nothing has ever happened. It was just a local thunderstorm...