On April 12, 1972 – nineteen Oklahoma HCN stations reached 100 degrees, and Mangum reached 106 degrees. Temperatures in Mangum today are forecast to be half that, at 53 degrees.
GHCN command used to generate this data
./ghcn.exe OK.txt through=0412 > OK.csv
If this happened today, climate experts would cite it as 100% proof of global warming, and James Hansen would say it was impossible with CO2 below 350 PPM.