I graduated from high school in Altus about then. Nobody that lived there had to be told when to go to the "'fraidy hole" in the storms that occur this time of year. We all knew when it was time to watch and time to duck and cover.
Only yankee carpetbaggers needed explicit instructions in how to stay out of the rain.
Well, you remember how it tore up Moore really bad?
The problem was, IIRC, many ppl didn’t have cellars or storm shelters. By the time it bore down on them it was either run away in a car (many died trying) or ride it out in their above ground apartment, stick house, etc. The roads were jammed. A substantial portion of casualties were those attempting to flee by car.
I was in an apt. in Lawton and ID-d a tel. manhole cover nearby that I planned to pry off and get in should one come our way. Not guaranteed but a better chance then a 2nd floor apt in a stick building.