> You can't go to the basement every time there's a tornado watch.

You can, though. I grew up attending a summer camp in Iowa, and we did go to the basement anytime there's a _warning_. 24 hours a day, if there's a nearby warning, all 200 campers & staff crammed into a basement singing songs and trying to keep the first-graders from crying.

That said, being able to tell the difference between a tornado warning and "a tornado will be at your house in 10 minutes" is the kind of detail that will almost certainly get folks to move to the basement and save lives.