The city of Norman is the home of the largest weather community in the world. Here are some links that possess useful information and to other local clubs (click on picture):
The National Weather Service in Norman, Oklahoma
The Storm Prediction Center in Norman, Oklahoma
The National Severe Storms Laboratory in Norman, Oklahoma
Also, the city of Norman is the home of the University of Oklahoma
Information on Cleveland County, Oklahoma Skywarn is located here
American Radio Relay League
Central Oklahoma Radio Amateurs (CORA) is made up of representatives from area clubs. They conduct Ham Holiday each year in July.
For a good reference for ham radio repeaters and locations, please visit USRepaters.com