Siren Test Net

The purpose of this net is to collect reports on the function of the outdoor warning system sirens in the cities of Norman and Moore during the weekly regional test.

These cities, along with others in the Central Oklahoma area, test their outdoor warning system (OWS) sirens every Saturday at Noon local time.

Volunteers Needed

For this net to fulfill its mandate, volunteers are needed. Please consult the maps below 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. It is important to report that a specific siren is sounding (or not sounding) and not whether the observer “hears sirens”.  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 are available to roam, watch for posts on the SCARS Facebook page.

Norman Outdoor Warning System

The City of Norman’s current OWS was purchased in 2011 and consists of 67 sirens. The new system entirely replaced an earlier system that did not adequately cover the entire city and that had some components dating back to Cold War attack-siren days.

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.  Most sirens are set to sound for 60 seconds during a regular test though a few sound for 20 seconds based on their location.  Occasionally, sirens will be tested for 3 minutes.  Click on this link for a list of the Norman sirens. Click on the map to view a larger image.

map

Moore Outdoor Warning System

The City of Moore’s current outdoor warning 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.  Some OWS sirens in Moore are electro-mechanical and have components that rotate and rotation or lack thereof should be reported.  The siren test typically runs for 3 minutes.  Click on this link for a list of the Moore sirens. Click on the map to view a larger image.

Net Structure

The SCARS Norman-Moore 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 their station’s callsign, their assigned outdoor warning siren number, and “Test Good” or “Test Fail”.  Siren run time and, if a monitored unit is electro-mechanical, whether rotation was observed, should be noted.  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 appropriate city’s emergency management personnel.

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: