ARPSC Siren Test Information
With over 270 Early Warning Sirens throughout Oakland County, residents are provided a tool to stay informed of approaching
severe weather when they are outdoors and may be away from television or radio media sources. Oakland County's policy is
to activate the warning sirens when a Tornado Warning or a Severe Thunderstorm with forecast winds of 70 MPH or more has
been issued by the National Weather Service. When activated, the sirens will sound for a period of approximately three minutes.
Residents are advised to listen to a radio or watch television in order to hear detailed information concerning the weather threat.
In order to ensure the functionality of the sirens, the ARPSC takes part in the first Saturday of the month siren test by
deploying members to observe sirens during the test. Volunteer amateur radio operators visually inspect and report on the
following items during the test:
- Activation for a full three minutes
- Continual, smooth rotation of the siren's horn while activated
- Full sound volume from the siren
- Condition of the siren horn, antenna, cable, and control box
- Encroachment of tree limbs or vegetation upon the control box or siren horn
In addition to the ARPSC visual inspection, the siren system also provides automated data metrics that are sent to the Oakland
County Department of Homeland Security.
Procedure for Participating
All amateur radio operators are encouraged to participate in the monthly siren test. To take part in a siren test, follow these steps:
- Select a siren you would like to observe from the OCARPSC website.
- Contact the Sub-Net Control Operator to confirm your selection. (See Sub-net Map.)
- Make sure your radio is programmed for the appropriate Sub-Net repeater. (See OCARPSC website.)
- Plan to arrive at your assigned siren at least 20 minutes early to allow sufficient time to locate the siren and get into position.
- Check-in with the Sub-Net Control Operator when you are in route to your siren and when you are on location. This confirms to the
Sub-net Control Operator that you remembered your siren assignment; arrived safely;
located the siren; and are in position, ready to go.
- Observe the items noted above during the test.
- Report your results when Net Control performs a roll call of all operators.
- Report "All OK" if the siren looks and performs properly, or report specific concerns or conditions requiring attention.
The goal is to observe all sirens within Oakland County at least once per year. Therefore, we ask all operators to check this
website when selecting a siren to determine whether it has already been checked. (See Checked Sirens)
Siren Testing Guidelines
- Sirens are chosen on line on the ARPSC website, or assigned by the Sub-net Control Operator on a first-come basis.
- Other amateur radio volunteers who may not belong to the OCARPSC may be assigned a siren by the Sub-net
- Sub-net Control Operators are expected to check the ARPSC website siren assignments prior to a scheduled test in
order to avoid duplicate assignments.
- Once a siren is assigned or chosen, you are expected to observe that siren. If for some reason you cannot
meet your obligation, you must notify the Sub-net Control Operator as soon as possible to allow time to
find a replacment.
- Volunteers are expected to go anywhere in the home quadrant, not just near your home.
- Volunteers should be willing to fan out during the season to cover other remaining sirens in the home quadrant,
and then remaining sirens in other quadrants if needed to help meet our goal.
- Siren maps are considered secure by the OCDHS and cannot be shared. Locations/directions will be provided by the
Sub-net Control Operator as needed.
- Once all of the sirens have been tested and observed, then a siren can be re-checked, but this must still be
coordinated with the Sub-net Control Operator in order to avoid duplicate assignments.
- Testing the same siren multiple times does not serve a purpose unless the siren is listed
as a Hot siren and requires retesting. Coordination with the Sub-net Control Operator is required
in order to avoid duplicate assignments.