The EF5 tornado that swept through Oklahoma on 20 May 2013, benefited from the response of radio amateurs operators, who assisted the state and the American Red Cross with its communications efforts.
“Amateur Radio operators were asked to support voice communications from the American Red Cross Oklahoma City Chapter Headquarters to their feeding station at the Incident Command Post located in Moore,” explained ARRL Oklahoma Section Emergency Coordinator Mark Conklin, N7XYO.
Moore, located about halfway between Norman and Oklahoma City, suffered the brunt of the tornado damage. As of 8:30 CDT on 22 May 2013, all Amateur Radio operations in support of the American Red Cross ceased.
Read the full story - http://www.arrl.org/news/amateurs-in-oklahoma-respond-to-storm-aftermath
Oklahoma Amateur Radio Emergency Services (ARES) Yahoo Group - http://groups.yahoo.com/group/aresoklahoma/
ARES Oklahoma - http://www.aresok.org/
Spotter Network - https://twitter.com/spotternetwork