EnidBuzz has an item on the 1966 tornado, starting with a dramatic picture that illustrates Oklahoma’s red-dirt lands and black-dirt lands in vertical form. A deadly core sample.

The readers describe the path, which agrees with my guesses. I wasn’t in Enid at that time. I lived in Manhattan, which was hit on the same day by the same huge outbreak of wrong-way tornados. Later I lived in the part of Enid that was destroyed, renting a house that had been moved into one of the emptied lots.