I actually asked this question a few hours ago in Del Rio, Texas. I was pulling out of my hotel when we were dazzled by an immense lightning display offsetting an ominous cloud formation that reached from a low sealing down to ground. I hit the brakes to avoid running a stop sign as the sky opened in an epic downpour. I asked my friend, “What does a tornado look like”. He pointed at the cloud formation – “like that”. It was then that the sirens for a tornado warning started. We were not sure what it meant, after all, Los Angeles is tornado free. We called a Texan for advice, only to get his voice mail. We decided to drive away from the storm. It was a scary moment. We ended up stopping for a steak outside of town while we watched a dazzling lighting show. When we returned, the streets were flooded, but everything looked ok.
The local news reported that a Super Cell produced numerous tornadoes to the north and south of the city of Del Rio. I’ve had fun for one night. I never want to see a tornado again.