Just thought I would take this opportunity to mention something you may or may not already know. The National Weather Service’s Norman Forecast Office covers 48 counties in Oklahoma as well as 8 counties in western, north Texas.
As for Oklahoma coverage from other NWS forecast offices:
The Amarillo, Texas forecast office covers the Oklahoma Panhandle.
Tulsa covers areas of eastern and northeastern Oklahoma.
Shreveport, La. covers areas of southeastern Okla.