St. Francis, Kansas
I remember seeing one of these on a trip many years ago with Sinbad. It was in a campground in Missouri, Arkansas or the like. Can't recall where exactly. This one was right here in our little city park camp. How nice. The sign shows it is rated to 250 mph wind speed.
Those vents are open to the outside. Just imagine the increase in air pressure and the noise. I could see daylight around the edges of the door. That other shelter I recall being completely sealed off from the outside. This one was better in the sense it had places to sit and a container with some survival supplies like a first aid kit, a flashlight, snacks, bottles water, etc.
And in the corner just in case the tornado scared the whatever out of you.
The lady in the museum told me this part of Kansas has rarely ever seen a tornado. But the storms coming down off of the Rockies to the west are pretty intense. Hail is a big factor here. One time hail came down in the shape of daggers, not round balls. Thin narrow sharp blades of ice. Ooo boy!