While the location of the cable headend matters in this situation, you may not realize that Norman (KOUN) is just an AWOS. You see it reporting every 20 minutes, but AWOS stations provide data that can be suspect. However, Oklahoma City (KOKC) has an ASOS, which gives a standard report every hour and is far more superior to an AWOS. By rule, only ASOS stations can be used for climate, and TWC usually defers to an ASOS for the LF when there is a choice between both types of stations nearby because of this discrepancy.