These cities, in conjunction with most other jurisdictions in the Central Oklahoma area, test their outdoor warning siren (OWS) system every Saturday at Noon local time.
Norman Outdoor Warning Sirens
The City of Norman’s current OWS was purchased in 2011 and consists of 68 sirens. The new system entirely replaced an earlier system that had some components dating back to Cold War attack siren days and that did not cover the entire city.
While the system has built-in telemetry and remote diagnostics members of the South Canadian Amateur Radio Society can provide value to the city by collecting direct observations of the proper functioning of the individual siren units. Each siren is typically set to run for either 30 or 60 seconds, depending on location for the siren test process. The total run time of each siren is reported to make sure each siren is working properly. Click on the map to view a larger image.
Moore Outdoor Warning Sirens
The City of Moore’s current outdoor warning siren system consists of 41 sirens. While the system has built-in telemetry and remote diagnostics members of the South Canadian Amateur Radio Society can provide value to the city by collecting direct observations of the proper functioning of the individual siren units. The total run time of each siren is reported to make sure each siren is working properly. Click on the map to view a larger image.
The SCARS/Norman Saturday Noon Siren Net is conducted as a roll-call net on the SCARS UHF repeater (443.7+ MHz, 141.3 Hz tone). Participating stations will wait until called to transmit their report. When called, each operator will reply with the station’s callsign, their assigned outdoor warning siren number, and “Test Good” or “Test Fail”. Total runtime of the of each siren is also reported. At the end of the roll call, you will be given an opportunity to report any siren, even if you’re not on the roll-call list. Stations with a “Test Fail” status will be queried for details of the failure for transmission to the City of Norman or the City of Moore Emergency Management Coordinators.
For this net to fulfill its mandate, volunteers are needed. Please consult the maps above and the spreadsheet at this link to determine which siren is closest to your station’s location. Ideally, operators will “adopt” the siren nearest their homes or at a convenient location for their Saturday afternoon activities. The only requirement is that volunteers be around most Saturdays at noon and that they be able to reliably report on the status of their adopted siren. If you happen to be out of position on Saturday, feel free to report on a siren near you.
There may be some weekly special requests for specific locations. If you’re available to roam, watch for posts on the SCARS Facebook page.
Sample Siren Sound
For those of you who need to have something to compare to, Ed Hatch AG5DV has provided us with a stereo, near field recording of Siren 20. Yes, this audio is probably loud, and will definitely wake the neighbors. Please play at your own risk. It sounded for three minutes, on the afternoon of August 5, 2017: