While the system will be tested nationally this weekend, it is also designed for state emergencies, according to the FCC, like AMBER alerts, but can also work in cases of national security emergencies. It has been designed as a joint venture by the FCC and FEMA. According to the FEMA website:
At the Federal Communications Commission’s June 9, 2011 Agenda meeting, Public Safety and Homeland Security Bureau Chief Jamie Barnett, joined by representatives from FEMA and the National Weather Service, announced that the first nationwide test of the Emergency Alert System (EAS) would take place at 2:00 PM (Eastern Standard Time) on November 9, 2011. The purpose
of the test is to assess the reliability and effectiveness of the EAS as a public alert mechanism. EAS Participants currently participate in state-level monthly tests and local-level weekly tests, but no top-down review of the entire system has ever been undertaken. The Commission, along with the Federal Emergency Management Agency, will use the results of this nationwide test to assess the reliability and effectiveness of the EAS as a public alert mechanism, and will work together with EAS stakeholders to make improvements to the system as appropriate.
Besides these announcements, the FCC has released a fairly spooky PSA featuring Chief of the Public Safety and Homeland Security Bureau of the FCC James Barnett, who reminds everyone to please not panic when they lose their television and radio for a few minutes on Wednesday. That ad, courtesy FCC, below: